Chemistry Stoichiometry Mcqs Test Online Class 11th Punjab

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Question 1 of 18

Chemistry

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

2

13

10

8

Question 1 of 18

Question 2 of 18

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

6.02x10²³

None of these

3.01x10²²

1.05x10²³

Question 2 of 18

Question 3 of 18

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

106 g

74 g

127 g

254 g

Question 3 of 18

Question 4 of 18

4. The Avogadro’s constant is the number of

Atoms in 1g of Helium

Electrons needed to deposit 24g of Mg

Atoms in 24g of Mg

Molecules in 35.5g of Chloride

Question 4 of 18

Question 5 of 18

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

Reactant

Limiting reactant

Stoichiometric amount

Stoichiometry

Question 5 of 18

Question 6 of 18

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

26 g

108 g

54 g

27 g

Question 6 of 18

Question 7 of 18

7. One mole of propane has the same ________.

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

Number of molecules as one mole of methane (CH₄)

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

Mass as half a mole of hexane (C₅H₁₄)

Question 7 of 18

Question 8 of 18

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

6.023x10²³

6.023x10¹⁹

None of these

1.084x10¹⁸

Question 8 of 18

Question 9 of 18

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

35.5g

71g

142g

18.75g

Question 9 of 18

Question 10 of 18

10. 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 10 of 18

Question 11 of 18

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

6.02x10²³

12.04x10²³

3.01x10²³

1.003x10²³

Question 11 of 18

Question 12 of 18

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

None of these

100 g

50 g

40 g

Question 12 of 18

Question 13 of 18

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

Mass

Number of electron

Number of molecules

Number of Atoms

Question 13 of 18

Question 14 of 18

14. Which of the following statements is incorrect?

12g of Carbon gas contains one mole of atoms

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

None of these

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

Question 14 of 18

Question 15 of 18

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

Carbon Monoxide

Diamond

Methane

Ethane

Question 15 of 18

Question 16 of 18

16. 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

150 cm³

200 cm³

100 cm³

Question 16 of 18

Question 17 of 18

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

N₂H₄

NH₄OH

NH₃

NO

Question 17 of 18

Question 18 of 18

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

1.5

2.0

0.5

1.0

Question 18 of 18

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