Mass and Stoichiometry, Class 11 Chemistry NCERT Solutions

1. There will be total 20  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. For the reaction 2NaN₃(s) → 2Na(s) + 3N₂ (g), how many moles of sodium azide (NaN₃) must react in order to produce 8.75 moles of nitrogen gas?

13.1 moles NaN₃

2.50 moles NaN₃

2.00 moles NaN₃

5.83 moles NaN₃

Your comments:

Question 1 of 20

2. Formula mass is used for which of the following substances?

Ionic compounds

Molecules

Atoms

Molecular compounds

Your comments:

Question 2 of 20

3. Amount of water produced by the combustion of 16g of methane is:

34 g

30 g

32 g

36 g

Your comments:

Question 3 of 20

4. Branch of chemistry in which quantities of reactants and products of a chemical reaction are determined is known as:

Thermodynamics

Stoichiometry

Chemical kinetics

Stereochemistry

Your comments:

Question 4 of 20

5. The mass of 1 Χ 10²² molecules of CuSO₄.5H₂O is:

41.59 g

415.9 g

4.159 g

None of these

Your comments:

Question 5 of 20

6. Which of the following is an element?

Sugar solution

Brass

HCl

Copper metal

Your comments:

Question 6 of 20

7. The mass of one mole of NaOH will be( At. mass of Na =23, O = 16, H =1)

16

40

80

23

Your comments:

Question 7 of 20

8. Substances whose two or more components completely mix with each other to make a uniform composition are called:

Ionic compounds

Elements

Heterogeneous mixtures

Homogenous mixtures

Your comments:

Question 8 of 20

9. If 2 moles of H₂ and O₂ are available for the reaction, identify the limiting reagent for the reaction,
2H₂ + O₂ → 2H₂O

H₂

O₂

H₂O

Both H₂ and O₂

Your comments:

Question 9 of 20

10. Which of the following has more number of atoms?

1 mole of Neon gas

1 mole of Ozone gas

1 mole of Oxygen gas

1 mole of Carbon monoxide gas

Your comments:

Question 10 of 20

11. Molecular mass of glucose molecule (C₆H₁₂O₆) is:

172 g

182 g

180 g

192 g

Your comments:

Question 11 of 20

12. If 0.5 mole of BaCl₂ is mixed with 0.2 mole of Na₃PO₄ ,then maximum number of moles of Ba₃(PO₄)₂ that can be formed

0.5

0.1

0.3

0.7

Your comments:

Question 12 of 20

13. The atomic mass of an element is usually fractional because:

Elements contain impurities

Elements are mixture of isotopes

Elements are mixture of allotropes

Elements are mixture of isobars

Your comments:

Question 13 of 20

14. Which of the following is a compound?

Air

Gold

Water

Sulphur

Your comments:

Question 14 of 20

15. If you have 2 moles of A and 3 moles of B, Identify the limiting reagent in the following reaction.

A + B → AB

A

B

A as well as B

None

Your comments:

Question 15 of 20

16. According to the chemical equation,

Mg(s) + 2HCl → MgCl₂(aq) + H₂(g)

How many moles of magnesium are needed to produce 12.34 moles of hydrogen gas?

24.68 mol

3.09 mol

6.17 mol

12.34 mol

Your comments:

Question 16 of 20

17. Two different atoms A and B combine together to form AB. What will be AB?

Atom

Ion

Element

Molecule

Your comments:

Question 17 of 20

18. Arsenic is a/an:

Element

Heterogeneous mixture

Homogeneous mixture

Compound

Your comments:

Question 18 of 20

19. If 0.5 mole of BaCl₂ is mixed with 0.2 mole of Na₃PO₄, then the maximum number of moles of Ba₃(PO₄)₂ that can be formed will be:

0.1

0.3

0.7

0.5

Your comments:

Question 19 of 20

20. 20 L of H₂ gas at S.T.P weigh about:

20 g

1.8 g

12.2 g

448 g

Your comments:

Question 20 of 20

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