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Chem Test : Question 1 of 10

The stoichiometry of the following reaction is The stoichiometry of the following reaction is

2 Mark(s)

0.084722222222222 0.084722222222222
0.042361111111111 0.042361111111111
0.043055555555556 0.043055555555556
0.084027777777778 0.084027777777778

A gas has a vapour density of 11.2. The volume occupied by 1 g of the gas at NTP is A gas has a vapour density of 11.2. The volume occupied by 1 g of the gas at NTP is

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1 L 1 L
11.2 L 11.2 L
22.4 L 22.4 L
4 L 4 L

The maximum number of molecules are present in The maximum number of molecules are present in

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15 L of H2 gas at STP 15 L of H2 gas at STP
5 L of N2 gas at STP 5 L of N2 gas at STP
0.5 g of H2 gas 0.5 g of H2 gas
10 g of O2 gas 10 g of O2 gas

Identify numerical value from following that has same value in Celsius and Fahrenheit? Identify numerical value from following that has same value in Celsius and Fahrenheit?

2 Mark(s)

-8 -8
0 0
-40 -40
-11.2 -11.2

The least count of an instrument is 0.01 cm. Taking all precautions, the most possible error in the measurement can be The least count of an instrument is 0.01 cm. Taking all precautions, the most possible error in the measurement can be

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0.005 cm 0.005 cm
0.01 cm 0.01 cm
0.0001 cm 0.0001 cm
0.1 cm 0.1 cm

The smallest matter particle that can take part in chemical reaction is The smallest matter particle that can take part in chemical reaction is

2 Mark(s)

Atom Atom
Molecule Molecule
Both a and b Both a and b
None of these None of these

Mass of 0.1 mole of methane is Mass of 0.1 mole of methane is

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1 g 1 g
16 g 16 g
1.6 g 1.6 g
0.1 g 0.1 g

When 10 g of 90% pure limestone is heated completely, the volume (in litres) of CO₂ liberated at STP is When 10 g of 90% pure limestone is heated completely, the volume (in litres) of CO₂ liberated at STP is

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22.4 22.4
2.24 2.24
20.16 20.16
2.016 2.016

100 g of CaCO₃ is treated with 1 L of 1 N HCl. What would be the weight of CO₂ liberated after the completion of the reaction? 100 g of CaCO₃ is treated with 1 L of 1 N HCl. What would be the weight of CO₂ liberated after the completion of the reaction?

2 Mark(s)

55 g 55 g
11 g 11 g
22 g 22 g
33 g 33 g

2 g of mixture of CO and CO₂ on reaction with excess I₂O₅ produced 2.54 g of I₂. What would be the mass % of CO₂ in the original mixture? 2 g of mixture of CO and CO₂ on reaction with excess I₂O₅ produced 2.54 g of I₂. What would be the mass % of CO₂ in the original mixture?

2 Mark(s)

60 60
30 30
70 70
35 35

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