Chemistry Stoichiometry Mcqs Test Online Class 11th Punjab

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Question 1 of 18

Chemistry

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

27 g

54 g

108 g

26 g

Question 1 of 18

Question 2 of 18

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

71g

35.5g

142g

18.75g

Question 2 of 18

Question 3 of 18

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

106 g

127 g

254 g

74 g

Question 3 of 18

Question 4 of 18

4. 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?

 

150 cm³

200 cm³

100 cm³

300 cm³

Question 4 of 18

Question 5 of 18

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

Ethane

Methane

Diamond

Carbon Monoxide

Question 5 of 18

Question 6 of 18

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

40 g

None of these

100 g

50 g

Question 6 of 18

Question 7 of 18

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

1.5

1.0

2.0

0.5

Question 7 of 18

Question 8 of 18

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

Number of molecules

Number of Atoms

Number of electron

Mass

Question 8 of 18

Question 9 of 18

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

6.02x10²³

3.01x10²²

None of these

1.05x10²³

Question 9 of 18

Question 10 of 18

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

1.003x10²³

12.04x10²³

6.02x10²³

3.01x10²³

Question 10 of 18

Question 11 of 18

11. The Avogadro’s constant is the number of

Atoms in 24g of Mg

Electrons needed to deposit 24g of Mg

Atoms in 1g of Helium

Molecules in 35.5g of Chloride

Question 11 of 18

Question 12 of 18

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

2

8

10

13

Question 12 of 18

Question 13 of 18

13. 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

1.2 dm³

3.6 dm³

None of these

Question 13 of 18

Question 14 of 18

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

6.023x10¹⁹

1.084x10¹⁸

6.023x10²³

None of these

Question 14 of 18

Question 15 of 18

15. Which of the following statements is incorrect?

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

None of these

12g of Carbon gas contains one mole of atoms

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

Question 15 of 18

Question 16 of 18

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

Stoichiometric amount

Limiting reactant

Reactant

Stoichiometry

Question 16 of 18

Question 17 of 18

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

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

Question 17 of 18

Question 18 of 18

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

NH₃

N₂H₄

NH₄OH

NO

Question 18 of 18

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