11 th Std Phy Unit 5 : Question 1 of 100

How many mole of oxygen gas at STP are equivalent to 5.6 litre? How many mole of oxygen gas at STP are equivalent to 5.6 litre?

2 Mark(s)

1/2 mole 1/2 mole
1/8 mole 1/8 mole
1 mole 1 mole
1/4 mole 1/4 mole

What is the correct order of C—X bond strength in CH₃—X? [MHT-CET 2020] What is the correct order of C—X bond strength in CH₃—X? [MHT-CET 2020]

2 Mark(s)

(A) CH₃I > CH₃Br > CH₃Cl > CH₃F (A) CH₃I > CH₃Br > CH₃Cl > CH₃F
(B) CH₃Cl > CH₃Br > CH₃I > CH₃F (B) CH₃Cl > CH₃Br > CH₃I > CH₃F
(C) CH₃F > CH₃Br > CH₃Cl > CH₃I (C) CH₃F > CH₃Br > CH₃Cl > CH₃I
(D) CH₃F > CH₃Cl > CH₃Br > CH₃I (D) CH₃F > CH₃Cl > CH₃Br > CH₃I

ΔU when system does 140 kJ work and gains 40 kJ heat? [2022] ΔU when system does 140 kJ work and gains 40 kJ heat? [2022]

2 Mark(s)

(A) -280 kJ (A) -280 kJ
(B) -100 kJ (B) -100 kJ
(C) -180 kJ (C) -180 kJ
(D) -200 kJ (D) -200 kJ

Which aromatic compound is least reactive to electrophilic substitution? Which aromatic compound is least reactive to electrophilic substitution?

2 Mark(s)

Which from following statements about hybrid orbitals is NOT true? Which from following statements about hybrid orbitals is NOT true?

2 Mark(s)

(A) Unequal hybrid orbitals formed (A) Unequal hybrid orbitals formed
(B) Different shapes (B) Different shapes
(C) Same energy (C) Same energy
(D) Holds 2 e⁻ (D) Holds 2 e⁻

Standard electrode potential is highest for Standard electrode potential is highest for

2 Mark(s)

(A) ½F₂(g) + e⁻ ⇌ F⁻(aq) (A) ½F₂(g) + e⁻ ⇌ F⁻(aq)
(B) ½Cl₂(g) + e⁻ ⇌ Cl⁻(aq) (B) ½Cl₂(g) + e⁻ ⇌ Cl⁻(aq)
(C) ½Br₂(g) + e⁻ ⇌ Br⁻(aq) (C) ½Br₂(g) + e⁻ ⇌ Br⁻(aq)
(D) ½I₂(g) + e⁻ ⇌ I⁻(aq) (D) ½I₂(g) + e⁻ ⇌ I⁻(aq)

Prefix 'nano' comes from Prefix 'nano' comes from

2 Mark(s)

Korean word meaning billion Korean word meaning billion
Greek word meaning dwarf Greek word meaning dwarf
Latin word meaning particles Latin word meaning particles
Latin word meaning visible. Latin word meaning visible.

Teflon, neoprene, nylon-6 are all Teflon, neoprene, nylon-6 are all

2 Mark(s)

Co polymer Co polymer
Condensation polymer Condensation polymer
Homopolymer Homopolymer
Monomers Monomers

The bleaching action of SO₂ is due to The bleaching action of SO₂ is due to

2 Mark(s)

(A) Hydrolysis (A) Hydrolysis
(B) Oxidation (B) Oxidation
(C) Reduction (C) Reduction
(D) It's active nature (D) It's active nature

Most reactive towards HCN? Most reactive towards HCN?

2 Mark(s)

HCHO HCHO
C₆H₅CHO C₆H₅CHO
CH₃COCH₃ CH₃COCH₃
CH₃CHO CH₃CHO

The velocity of electron in first orbit of H-atom as compared to the velocity of light is The velocity of electron in first orbit of H-atom as compared to the velocity of light is

2 Mark(s)

1/01th 1/01th
1/100th 1/100th
1/4000th 1/4000th
Same Same

Identify secondary allylic alcohol: [MHT-CET 2021] Identify secondary allylic alcohol: [MHT-CET 2021]

2 Mark(s)

(A) CH₂=CH–CH(OH)–CH₃ (A) CH₂=CH–CH(OH)–CH₃
(B) CH₂=CH–CH₂OH (B) CH₂=CH–CH₂OH
(C) (CH₃)₂C=CH–CH₂OH (C) (CH₃)₂C=CH–CH₂OH
(D) C₆H₅–CH₂OH (D) C₆H₅–CH₂OH

Carbohydrates are Carbohydrates are

2 Mark(s)

Hydrates of carbon Hydrates of carbon
Polyhydroxy aldehydes/ketones Polyhydroxy aldehydes/ketones
Polyhydroxy acids Polyhydroxy acids
Polyhydroxy amino compounds Polyhydroxy amino compounds

Preservation of food by addition of heat does not involve Preservation of food by addition of heat does not involve

2 Mark(s)

Pasteurisation Pasteurisation
Sterilization Sterilization
Canning Canning
puff drying puff drying

Identify the polymer from following used to prepare disposable cups and plates. [2023] Identify the polymer from following used to prepare disposable cups and plates. [2023]

2 Mark(s)

Polypropylene Polypropylene
PVC PVC
PETE PETE
Polystyrene Polystyrene

Which of the following antiseptic is used to clean mouth cavity and prevent bad breath : Which of the following antiseptic is used to clean mouth cavity and prevent bad breath :

2 Mark(s)

Iodine Iodine
lodoform lodoform
Boric acid Boric acid
H₂O₂ H₂O₂

2 Mark(s)

(A) 39.27% (A) 39.27%
(B) 68.02% (B) 68.02%
(C) 74.05% (C) 74.05%
(D) 78.54% (D) 78.54%

When sulphur dioxide combines with chlorine in the presence of charcoal catalyst, the product formed is [MHT-CET 2020] When sulphur dioxide combines with chlorine in the presence of charcoal catalyst, the product formed is [MHT-CET 2020]

2 Mark(s)

(A) (A)
(B) (B)
(C) Colloidal Sulphur (C) Colloidal Sulphur
(D) SO₂Cl₂ (D) SO₂Cl₂

Aromatic ketone? Aromatic ketone?

2 Mark(s)

Benzophenone Benzophenone
Diethyl ketone Diethyl ketone
Acetone Acetone
Ethyl methyl ketone Ethyl methyl ketone

Emulsifier is an agent which Emulsifier is an agent which

2 Mark(s)

homogenizes the emulsion homogenizes the emulsion
stabilises the emulsion stabilises the emulsion
accelerates the dispersion accelerates the dispersion
none of these none of these

Which of the following can form colloidal sol with water? [MHT-CET 2020] Which of the following can form colloidal sol with water? [MHT-CET 2020]

2 Mark(s)

Common salt Common salt
Ammonium sulphate Ammonium sulphate
Glucose Glucose
Starch Starch

Rate constant when concentration decreases by 90% in 30 min: Rate constant when concentration decreases by 90% in 30 min:

2 Mark(s)

7.7×10⁻² min⁻¹ 7.7×10⁻² min⁻¹
3.5×10⁻² min⁻¹ 3.5×10⁻² min⁻¹
2.1×10⁻² min⁻¹ 2.1×10⁻² min⁻¹
4.2×10⁻² min⁻¹ 4.2×10⁻² min⁻¹

Minimum spheres required to develop octahedral void? [MHT-CET 2024] Minimum spheres required to develop octahedral void? [MHT-CET 2024]

2 Mark(s)

(A) 8 (A) 8
(B) 4 (B) 4
(C) 6 (C) 6
(D) 2 (D) 2

False statement about hybrid orbitals False statement about hybrid orbitals

2 Mark(s)

(A) Unequal number formed (A) Unequal number formed
(B) Different shapes (B) Different shapes
(C) Same energy (C) Same energy
(D) Holds 2 e⁻ (D) Holds 2 e⁻

Amino acid with nonpolar side chain Amino acid with nonpolar side chain

2 Mark(s)

Isoleucine Isoleucine
Aspartic acid Aspartic acid
Serine Serine
Lysine Lysine

Shifting PCl₃ + Cl₂ ⇌ PCl₅ equilibrium right: Shifting PCl₃ + Cl₂ ⇌ PCl₅ equilibrium right:

2 Mark(s)

Doubling volume Doubling volume
Increasing temperature Increasing temperature
Adding PCl₃ and PCl₅ Adding PCl₃ and PCl₅
Adding Cl₂ Adding Cl₂

Which ligand among the following has highest splitting power of d-orbitals of central metal ion? [MHT-CET 2020] Which ligand among the following has highest splitting power of d-orbitals of central metal ion? [MHT-CET 2020]

2 Mark(s)

(A) NCS (A) NCS
(B) H₂O (B) H₂O
(C) CO (C) CO
(D) NH₃ (D) NH₃

FeSO₄ gives brown ring with FeSO₄ gives brown ring with

2 Mark(s)

(A) NO (A) NO
(B) (B)
(C) (C)
(D) (D)

Which of the following properties does not correspond to the order HI < HBr < HCl < HF? Which of the following properties does not correspond to the order HI < HBr < HCl < HF?

2 Mark(s)

(A) Thermal stability (A) Thermal stability
(B) Reducing character (B) Reducing character
(C) Bond dissociation enthalpy (C) Bond dissociation enthalpy
(D) Dipole moment (D) Dipole moment

Unit of rate constant for time⁻¹: Unit of rate constant for time⁻¹:

2 Mark(s)

Zero order Zero order
First order First order
Second order Second order
Third order Third order

Compound soluble in benzene but not water: Compound soluble in benzene but not water:

2 Mark(s)

C₂H₅OH C₂H₅OH
CH₃COOH CH₃COOH
CH₃CHO CH₃CHO
C₆H₅NO₂ C₆H₅NO₂

A liquid is found to scatter a beam of light but leaves no residue when passed through the filter paper. The liquid can be know as A liquid is found to scatter a beam of light but leaves no residue when passed through the filter paper. The liquid can be know as

2 Mark(s)

oil oil
a suspension a suspension
a colloidal sol a colloidal sol
a true solution a true solution

t½ for first order with k=0.02 min⁻¹: t½ for first order with k=0.02 min⁻¹:

2 Mark(s)

100 min 100 min
2.5 min 2.5 min
34.7 min 34.7 min
50 min 50 min

How many donor groups are present in dimethyl glyoximato? [MHT-CET 2020] How many donor groups are present in dimethyl glyoximato? [MHT-CET 2020]

2 Mark(s)

(A) Two (A) Two
(B) Four (B) Four
(C) Three (C) Three
(D) One (D) One

Methyl ketone identification test? Methyl ketone identification test?

2 Mark(s)

Lucas test Lucas test
Haloform test Haloform test
Hinsberg test Hinsberg test
Millon's test Millon's test

Dissociation constant of 1.00 M acid (0.01% ionized): Dissociation constant of 1.00 M acid (0.01% ionized):

2 Mark(s)

1×10⁻⁸ 1×10⁻⁸
1×10⁻⁴ 1×10⁻⁴
1×10⁻⁶ 1×10⁻⁶
1×10⁻⁵ 1×10⁻⁵

Which product will not produce when BeCl₂ reacted with LiAlH₄? Which product will not produce when BeCl₂ reacted with LiAlH₄?

2 Mark(s)

(A) HCl (A) HCl
(B) BeH₂ (B) BeH₂
(C) AlCl₃ (C) AlCl₃
(D) LiCl (D) LiCl

The mass of nitrogen per gram hydrogen in the compound hydrazine is exactly one and half times the mass of nitrogen in the compound ammonia. The fact illustrates the The mass of nitrogen per gram hydrogen in the compound hydrazine is exactly one and half times the mass of nitrogen in the compound ammonia. The fact illustrates the

2 Mark(s)

Law of conservation of mass Law of conservation of mass
Multiple valency of nitrogen Multiple valency of nitrogen
Law of multiple proportions Law of multiple proportions
Law of definite proportions Law of definite proportions

Which is a vinylic halide? [2023] Which is a vinylic halide? [2023]

2 Mark(s)

(A) Ph—CH₂—X (A) Ph—CH₂—X
(B) CH₃—CH=CH—X (B) CH₃—CH=CH—X
(C) CH₂=CH—CH₂—X (C) CH₂=CH—CH₂—X
(D) CH₃—C≡C—X (D) CH₃—C≡C—X

The enthalpy of combustion of methane at 25°C is 890 kJ. The heat liberated when 3.2 g of methane is burnt in air is The enthalpy of combustion of methane at 25°C is 890 kJ. The heat liberated when 3.2 g of methane is burnt in air is

2 Mark(s)

445 kJ 445 kJ
278 kJ 278 kJ
-890 kJ -890 kJ
178 kJ 178 kJ

Vapour pressure of dilute aqueous glucose solution is 750 mmHg at 373 K. The mole fraction of solute is Vapour pressure of dilute aqueous glucose solution is 750 mmHg at 373 K. The mole fraction of solute is

2 Mark(s)

27760 27760
1/7.6 1/7.6
13881 13881
45931 45931

Which of the following drugs are used in sleep inducing pills? Which of the following drugs are used in sleep inducing pills?

2 Mark(s)

Antibiotics Antibiotics
Traquilizers Traquilizers
antipyretics antipyretics
Anti inflammatory drugs Anti inflammatory drugs

Which principle states that electrons pair only after each orbital in a subshell gets one electron? Which principle states that electrons pair only after each orbital in a subshell gets one electron?

2 Mark(s)

Hund’s rule Hund’s rule
Heisenberg principle Heisenberg principle
Aufbau principle Aufbau principle
Pauli’s principle Pauli’s principle

Weight of Cl₂ deposited by 300mA current for 1 min through molten NaCl: Weight of Cl₂ deposited by 300mA current for 1 min through molten NaCl:

2 Mark(s)

1.123×10⁻²⁰g 1.123×10⁻²⁰g
6.621×10⁻³g 6.621×10⁻³g
2.216×10⁻²⁰g 2.216×10⁻²⁰g
5.6×10¹⁹g 5.6×10¹⁹g

2 Mark(s)

Aldehyde, ketone, NH₃ Aldehyde, ketone, NH₃
Ketone, 1° amine, KMnO₄ Ketone, 1° amine, KMnO₄
Ketone, 2° amine, KMnO₄ Ketone, 2° amine, KMnO₄
Ketimine, 1° amine, H₂SO₅ Ketimine, 1° amine, H₂SO₅

Which among the following gases exhibits very low solubility in water at room temperature? Which among the following gases exhibits very low solubility in water at room temperature?

2 Mark(s)

NH₃ NH₃
O₂ O₂
CO₂ CO₂
HCl HCl

Among NH₃, HNO₃, NaN₃ and Mg₃N₂; the number of molecules having nitrogen in negative oxidation state is Among NH₃, HNO₃, NaN₃ and Mg₃N₂; the number of molecules having nitrogen in negative oxidation state is

2 Mark(s)

Molar conductivity of 0.01M solution with κ=1.061×10⁻⁴ Ω⁻¹ cm⁻¹: Molar conductivity of 0.01M solution with κ=1.061×10⁻⁴ Ω⁻¹ cm⁻¹:

2 Mark(s)

10.61 Ω⁻¹ cm² mol⁻¹ 10.61 Ω⁻¹ cm² mol⁻¹
1.061 Ω⁻¹ cm² mol⁻¹ 1.061 Ω⁻¹ cm² mol⁻¹
106.1 Ω⁻¹ cm² mol⁻¹ 106.1 Ω⁻¹ cm² mol⁻¹
1.061×10⁻⁴ Ω⁻¹ cm² mol⁻¹ 1.061×10⁻⁴ Ω⁻¹ cm² mol⁻¹

Which of the following has least oxidation state of Fe? Which of the following has least oxidation state of Fe?

2 Mark(s)

(A) K₃[Fe(OH)₆] (A) K₃[Fe(OH)₆]
(B) K₂[FeO₄] (B) K₂[FeO₄]
(C) FeSO₄(NH₄)₂SO₄·6H₂O (C) FeSO₄(NH₄)₂SO₄·6H₂O
(D) [Fe(CN)₆]³⁻ (D) [Fe(CN)₆]³⁻

Which one of the following is a copolymer? Which one of the following is a copolymer?

2 Mark(s)

Saran Saran
Orlon Orlon
PVC PVC
Teflon Teflon

2 Mark(s)

Energy of electron in stationary state n=2 is Energy of electron in stationary state n=2 is

2 Mark(s)

−0.545×10−18J −0.545×10−18J
−3.45×10−18J −3.45×10−18J
−2.5×10−18J −2.5×10−18J
−1.45×10−18J −1.45×10−18J

Heat of combustion at constant volume for C₆H₆(l) (ΔH=-3268 kJ/mol at 298K) [MHT-CET 2020] Heat of combustion at constant volume for C₆H₆(l) (ΔH=-3268 kJ/mol at 298K) [MHT-CET 2020]

2 Mark(s)

(A) -6728 kJ (A) -6728 kJ
(B) -672.8 kJ (B) -672.8 kJ
(C) -3264.2 kJ (C) -3264.2 kJ
(D) -1632 kJ (D) -1632 kJ

Preservation of food by addition of heat does not involve Preservation of food by addition of heat does not involve

2 Mark(s)

Pasteurisation Pasteurisation
Sterilization Sterilization
Canning Canning
puff drying puff drying

Interstitial hole is called tetrahedral because ______ Interstitial hole is called tetrahedral because ______

2 Mark(s)

(A) Formed by six spheres (A) Formed by six spheres
(B) Tetrahedral shape (B) Tetrahedral shape
(C) Four spheres form tetrahedron (C) Four spheres form tetrahedron
(D) Formed by three spheres (D) Formed by three spheres

The mass of 112 cm³ of CH4 gas at STP is The mass of 112 cm³ of CH4 gas at STP is

2 Mark(s)

0.16 g 0.16 g
0.8 g 0.8 g
0.08 g 0.08 g
1.6 g 1.6 g

What is the oxidation state of chlorine atom in chlorous acid? [MHT-CET 2020] What is the oxidation state of chlorine atom in chlorous acid? [MHT-CET 2020]

2 Mark(s)

-1 -1
2 2
3 3
1 1

What is the number of moles of silver iodide obtained when one mole of pentammineaquacobalt(III) iodide is treated with excess silver nitrate solution? [MHTCET 2024] What is the number of moles of silver iodide obtained when one mole of pentammineaquacobalt(III) iodide is treated with excess silver nitrate solution? [MHTCET 2024]

2 Mark(s)

(A) 2 (A) 2
(B) 3 (B) 3
(C) 4 (C) 4
(D) 5 (D) 5

When Ea decreases at constant T: When Ea decreases at constant T:

2 Mark(s)

e^(-Ea/RT) decreases e^(-Ea/RT) decreases
-Ea/RT decreases -Ea/RT decreases
k decreases k decreases
Ea/RT decreases Ea/RT decreases

Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at. wt. of Fe = 56) present in one molecule of haemoglobin is Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at. wt. of Fe = 56) present in one molecule of haemoglobin is

2 Mark(s)

The ionic radii of Rb⁺ and I⁻ are 1.46 Å and 2.16 Å. Most probable structure is? The ionic radii of Rb⁺ and I⁻ are 1.46 Å and 2.16 Å. Most probable structure is?

2 Mark(s)

(A) CsCl type (A) CsCl type
(B) ZnS type (B) ZnS type
(C) NaCl type (C) NaCl type
(D) CaF₂ type (D) CaF₂ type

The test for unsaturation is confirmed by the decolourisation of which of the following? The test for unsaturation is confirmed by the decolourisation of which of the following?

2 Mark(s)

Iodine water Iodine water
CuSO₄ solution CuSO₄ solution
Bromine water Bromine water
All of these All of these

Which does NOT undergo Schotten-Baumann reaction? Which does NOT undergo Schotten-Baumann reaction?

2 Mark(s)

Phenol Phenol
1° amine 1° amine
2° amine 2° amine
3° amine 3° amine

Maltose on hydrolysis produces Maltose on hydrolysis produces

2 Mark(s)

β-D-glucose β-D-glucose
α-D-glucose α-D-glucose
β-D-fructose β-D-fructose
α-D-fructose α-D-fructose

What is the radius of fourth orbit of Be3+? What is the radius of fourth orbit of Be3+?

2 Mark(s)

211.6 pm 211.6 pm
13.2 pm 13.2 pm
52.9 pm 52.9 pm
158.7 pm 158.7 pm

Depression in human is caused due to Depression in human is caused due to

2 Mark(s)

Increase in Noradrenaline level Increase in Noradrenaline level
Decrease in noradrenaline level Decrease in noradrenaline level
Increase in blood pressure Increase in blood pressure
Decrease in level of oxygen in blood Decrease in level of oxygen in blood

In reversible isothermal process, change in internal energy is In reversible isothermal process, change in internal energy is

2 Mark(s)

(A) Zero (A) Zero
(B) Positive (B) Positive
(C) Negative (C) Negative
(D) None (D) None

Unit of dipole moment is Unit of dipole moment is

2 Mark(s)

(A) dynes (A) dynes
(B) poise (B) poise
(C) newton (C) newton
(D) debye (D) debye

What is the quantity of sugar charcoal obtained when 34.2 g sugar is charred using conc. H₂SO₄? [2022] What is the quantity of sugar charcoal obtained when 34.2 g sugar is charred using conc. H₂SO₄? [2022]

2 Mark(s)

114 g 114 g
10.5 g 10.5 g
14.4 g 14.4 g
11.0 g 11.0 g

When HCl is treated with propene in presence of sodium peroxide, the major product obtained is When HCl is treated with propene in presence of sodium peroxide, the major product obtained is

2 Mark(s)

2,2 - dichloropropane 2,2 - dichloropropane
1,2 - dichloropropane 1,2 - dichloropropane
1-Chloropropane 1-Chloropropane
2-Chloropropane 2-Chloropropane

Identify allylic halide: Identify allylic halide:

2 Mark(s)

(A) CH₂=CH—CH₂—X (A) CH₂=CH—CH₂—X
(B) Ph—CH₂—X (B) Ph—CH₂—X
(C) CH₂=CH—X (C) CH₂=CH—X
(D) Ph—X (D) Ph—X

Identify the instrument used to find the structure of surface of material.[MHTCET 2024] Identify the instrument used to find the structure of surface of material.[MHTCET 2024]

2 Mark(s)

Scanning electron microscope Scanning electron microscope
UV-visible spectrophotometer UV-visible spectrophotometer
Transmission electron microscope Transmission electron microscope
X-ray diffractometer X-ray diffractometer

The value of n in MnO₄⁻ + 8H⁺ + ne⁻ → Mn²⁺ + 4H₂O is The value of n in MnO₄⁻ + 8H⁺ + ne⁻ → Mn²⁺ + 4H₂O is

2 Mark(s)

A cyclic hydrocarbon molecule has all the carbon and hydrogen in a single plane. All the carbon-carbon bonds are of same length, less than 1.54 Å, but more than 1.34 Å. The C-c bond angle will be A cyclic hydrocarbon molecule has all the carbon and hydrogen in a single plane. All the carbon-carbon bonds are of same length, less than 1.54 Å, but more than 1.34 Å. The C-c bond angle will be

2 Mark(s)

109°28' 109°28'
100° 100°
180° 180°
120° 120°

If molar conductivity of 0.8M solution is 5×10⁵ Ω⁻¹ cm² mol⁻¹, its conductivity is: If molar conductivity of 0.8M solution is 5×10⁵ Ω⁻¹ cm² mol⁻¹, its conductivity is:

2 Mark(s)

1.6×10² Ω⁻¹ cm⁻¹ 1.6×10² Ω⁻¹ cm⁻¹
4×10² Ω⁻¹ cm⁻¹ 4×10² Ω⁻¹ cm⁻¹
2×10² Ω⁻¹ cm⁻¹ 2×10² Ω⁻¹ cm⁻¹
6×10² Ω⁻¹ cm⁻¹ 6×10² Ω⁻¹ cm⁻¹

By using which of the following compound washing soda is prepared by ammonia soda process? By using which of the following compound washing soda is prepared by ammonia soda process?

2 Mark(s)

(A) NaCl, NH₄OH and K₂CO₃ (A) NaCl, NH₄OH and K₂CO₃
(B) Sodium hydrogen carbonate NH₃ and CO₂
(C) Solution of NaCl, ammonia and CaCO₃
(D) Solution of brine,ammonia,milk of lime and CO₂ gas

What is the radius of fourth orbit of Be3+? What is the radius of fourth orbit of Be3+?

2 Mark(s)

211.6 pm 211.6 pm
13.2 pm 13.2 pm
52.9 pm 52.9 pm
158.7 pm 158.7 pm

To calculate Ea using Arrhenius equation, plot: To calculate Ea using Arrhenius equation, plot:

2 Mark(s)

lnk vs 1/T lnk vs 1/T
k vs T k vs T
lnk vs T lnk vs T
k vs 1/T k vs 1/T

Beautiful ruby red colour of some ancient glass paintings is due to ……. and …….. nanoparticles trapped in the glass matrix. Beautiful ruby red colour of some ancient glass paintings is due to ……. and …….. nanoparticles trapped in the glass matrix.

2 Mark(s)

Ag, Pt Ag, Pt
Ag, Cu Ag, Cu
Ag, Au Ag, Au
Au, Pt Au, Pt

Compound called p-cresol: [MHT-CET 2020] Compound called p-cresol: [MHT-CET 2020]

2 Mark(s)

(A) Benzene-1,2,4-triol (A) Benzene-1,2,4-triol
(B) Benzene-1,3-diol (B) Benzene-1,3-diol
(C) 4-Methylphenol (C) 4-Methylphenol
(D) Benzene-1,4-diol (D) Benzene-1,4-diol

______ an emulsifying agents helps in the formation of o/w emulsion. ______ an emulsifying agents helps in the formation of o/w emulsion.

2 Mark(s)

Long chain alcohols Long chain alcohols
Fatty acids Fatty acids
Lamp black Lamp black
Proteins Proteins

Tranquilizers are used to cure : Tranquilizers are used to cure :

2 Mark(s)

Bacterial infection Bacterial infection
To stop the growth of pus forming micro organisms
Headache and body pains Headache and body pains
Mental agitation and violence Mental agitation and violence

Reaction type for CO₂ + 2H₂O ⇌ CH₄ + 2O₂ (shifts right on heating): Reaction type for CO₂ + 2H₂O ⇌ CH₄ + 2O₂ (shifts right on heating):

2 Mark(s)

Exothermic Exothermic
Unimolecular Unimolecular
Endothermic Endothermic
Spontaneous Spontaneous

The chemical messengers The chemical messengers

2 Mark(s)

Carry different messages between neurons and muscles
Carry different messages between muscles
Carry messages between brain and nerves Carry messages between brain and nerves
Carry messages from body to thalamus Carry messages from body to thalamus

The equation λ=h/mv was deduced by The equation λ=h/mv was deduced by

2 Mark(s)

Newton Newton
de-Broglie de-Broglie
Planck Planck
Heisenberg Heisenberg

Pair of dihydric phenols: [2023] Pair of dihydric phenols: [2023]

2 Mark(s)

(A) Quinol + Phloroglucinol (A) Quinol + Phloroglucinol
(B) Resorcinol + Pyrogallol (B) Resorcinol + Pyrogallol
(C) Phloroglucinol + Pyrogallol (C) Phloroglucinol + Pyrogallol
(D) Catechol + Quinol (D) Catechol + Quinol

Electrons flowing when 5A current passes for 200s: Electrons flowing when 5A current passes for 200s:

2 Mark(s)

9.65×10²¹ 9.65×10²¹
1.60×10²¹ 1.60×10²¹
6.24×10²¹ 6.24×10²¹
3.12×10²¹ 3.12×10²¹

Calculate the wavenumber of photon emitted during transition from n=3to n=2 in hydrogen atom (RH=109677cm−1). Calculate the wavenumber of photon emitted during transition from n=3to n=2 in hydrogen atom (RH=109677cm−1).

2 Mark(s)

15354.8 cm−1 15354.8 cm−1
30515.4 cm−1 30515.4 cm−1
41128.5 cm−1 41128.5 cm−1
82257.8 cm−1 82257.8 cm−1

Compound reacting with Na₂CO₃ to give salt + CO₂: Compound reacting with Na₂CO₃ to give salt + CO₂:

2 Mark(s)

Phenol Phenol
1-Hexanol 1-Hexanol
Formic acid Formic acid
Ethanal Ethanal

Which amine CANNOT be prepared via Gabriel synthesis? Which amine CANNOT be prepared via Gabriel synthesis?

2 Mark(s)

sec-propyl amine sec-propyl amine
tert-butyl amine tert-butyl amine
N-methyl benzyl amine N-methyl benzyl amine
2-phenylethyl amine 2-phenylethyl amine

Identify constitutes irreversible colloidal system in water as dispersion medium. Identify constitutes irreversible colloidal system in water as dispersion medium.

2 Mark(s)

Clay Clay
Fe(OH)₃ Fe(OH)₃
Platinum Platinum
All of these All of these

Vapour pressure of water at 20°C is 17.5 mmHg. If 18 g glucose (M=180) is added to 178.2 g water, P_solution is: Vapour pressure of water at 20°C is 17.5 mmHg. If 18 g glucose (M=180) is added to 178.2 g water, P_solution is:

2 Mark(s)

17.675 mmHg 17.675 mmHg
15.750 mmHg 15.750 mmHg
16.500 mmHg 16.500 mmHg
17.325 mmHg 17.325 mmHg

Which is NOT obtained when bromobenzene reacts with bromoethane + Na/dry ether? [MHT-CET 2020] Which is NOT obtained when bromobenzene reacts with bromoethane + Na/dry ether? [MHT-CET 2020]

2 Mark(s)

(A) Diphenyl (A) Diphenyl
(B) n-Butane (B) n-Butane
(C) Toluene (C) Toluene
(D) Ethylbenzene (D) Ethylbenzene

Solid CO₂ is an example of Solid CO₂ is an example of

2 Mark(s)

(A) Ionic crystal (A) Ionic crystal
(B) Covalent crystal (B) Covalent crystal
(C) Metallic crystal (C) Metallic crystal
(D) Molecular crystal (D) Molecular crystal

Which substrate will give racemised product? Which substrate will give racemised product?

2 Mark(s)

Calculate the molal elevation constant if ΔT_b = 0.68 K for a 0.34 m solution. Calculate the molal elevation constant if ΔT_b = 0.68 K for a 0.34 m solution.

2 Mark(s)

1.5 K kg mol⁻¹ 1.5 K kg mol⁻¹
2.0 K kg mol⁻¹ 2.0 K kg mol⁻¹
2.5 K kg mol⁻¹ 2.5 K kg mol⁻¹
3.0 K kg mol⁻¹ 3.0 K kg mol⁻¹

Incorrect statement about saccharic acid [MHT-CET 2020] Incorrect statement about saccharic acid [MHT-CET 2020]

2 Mark(s)

Obtained from gluconic acid Obtained from gluconic acid
Contains 1 COOH + 4 OH Contains 1 COOH + 4 OH
Obtained from glucose Obtained from glucose
Contains 2 COOH groups Contains 2 COOH groups

The carbohydrate which serves as reserve glucose in body is______ The carbohydrate which serves as reserve glucose in body is______

2 Mark(s)

Sucrose Sucrose
Starch Starch
Lactose Lactose
Glycogen Glycogen

The AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by the As atoms for bonding are The AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by the As atoms for bonding are

2 Mark(s)

(A) dx²-y², dz², s, px, py (A) dx²-y², dz², s, px, py
(B) dxy, s, px, pz (B) dxy, s, px, pz
(C) s, px, py, pz, dz² (C) s, px, py, pz, dz²
(D) dx²-y², s, px, py (D) dx²-y², s, px, py

Position of double bond in alkenes is identified by Position of double bond in alkenes is identified by

2 Mark(s)

Ozonolysis Ozonolysis
Bromine water Bromine water
Ammonical silver nitrate Ammonical silver nitrate
None of these None of these