Chemistry Stoichiometry Mcqs Test Online Class 11th Punjab

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Question 1 of 18

Chemistry

1. The Avogadro’s constant is the number of

Atoms in 24g of Mg

Molecules in 35.5g of Chloride

Atoms in 1g of Helium

Electrons needed to deposit 24g of Mg

Question 1 of 18

Question 2 of 18

2. If four moles of SO₂ are oxidized to SO₃, how many moles of oxygen molecules are required.

1.0

2.0

1.5

0.5

Question 2 of 18

Question 3 of 18

3. What volume of SO₂ at room temperature and pressure is produced on heating 9.7g of Zinc Sulphide (ZnS) if reaction takes place as follows
2ZnS(g) + 3O₂(g) → 2ZnO(g) + 2SO₂(g)

2.4 dm³

None of these

3.6 dm³

1.2 dm³

Question 3 of 18

Question 4 of 18

4. What is the mass of aluminum in 204 g of the aluminum oxide, Al₂O₃

108 g

27 g

26 g

54 g

Question 4 of 18

Question 5 of 18

5. One mole of ethanol and one mole of ethane have an equal

Number of electron

Mass

Number of molecules

Number of Atoms

Question 5 of 18

Question 6 of 18

6. One mole of propane has the same ________.

Mass as half a mole of hexane (C₅H₁₄)

Number of molecules as one mole of methane (CH₄)

Number of molecules as in one mole of ethane (C₂H₆)

Number of C-atoms as in one mole of butane (C₄H₁₀)

Question 6 of 18

Question 7 of 18

7. Which one of the following compounds contains the highest percentage by mass of nitrogen

NH₃

NO

NH₄OH

N₂H₄

Question 7 of 18

Question 8 of 18

8. How many moles of oxygen ate needed for the complete combustion of two moles of butane?

13

10

2

8

Question 8 of 18

Question 9 of 18

9. How many molecules are there in one mole of H²O?

6.023x10¹⁹

1.084x10¹⁸

6.023x10²³

None of these

Question 9 of 18

Question 10 of 18

10. Vitamin-A has a molecular formula C₂₀H₃₀ O. The number of vitamin – A molecules in 500 mg of its capsule will be

1.05x10²³

None of these

3.01x10²²

6.02x10²³

Question 10 of 18

Question 11 of 18

11. Methane reacts with steam to form H₂ and CO as shown below,

What volume of H₂ can be obtained from 100 cm³ of methane at the standard temperature and pressure?

 

300 cm³

200 cm³

150 cm³

100 cm³

Question 11 of 18

Question 12 of 18

12. When one mole of each of the following is completely burnt in oxygen, which will give the largest mass of CO₂?

Methane

Diamond

Carbon Monoxide

Ethane

Question 12 of 18

Question 13 of 18

13. Which of the following statements is incorrect?

1 dm³ of a 1.0 Mole dm³ solution of NaCl contains one mole of Chloride ions

None of these

12g of Carbon gas contains one mole of atoms

28g of Nitrogen gas contains one mole of molecules of N2

Question 13 of 18

Question 14 of 18

14. A necklace has 6g of diamond in it. What are the numbers of atoms in it?

1.003x10²³

12.04x10²³

3.01x10²³

6.02x10²³

Question 14 of 18

Question 15 of 18

15. The reactant which is consumed earlier and gives least quantity of product is called.

Limiting reactant

Reactant

Stoichiometry

Stoichiometric amount

Question 15 of 18

Question 16 of 18

16. A flask contains 500 cm³ of SO₂ at STP, The flask contains

50 g

None of these

40 g

100 g

Question 16 of 18

Question 17 of 18

17. What is the mass of one mole of Iodine Molecules?

106 g

254 g

74 g

127 g

Question 17 of 18

Question 18 of 18

18. The relative atomic mass of Chlorine is 35.5. What is the mass of 2 moles of Chlorine gas?

18.75g

35.5g

71g

142g

Question 18 of 18

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