MCQs on Covalent Bonding

MCQs on Covalent Bonding

1. The octet rule is not valid for the molecule

1. CO₂
2. H₂O
3. O₂
4. CO

Answer: (d)

2. The nature of bonding in CCl₄ and CaH₂ is

1. electrovalent in both CCl₄ and CaH₂
2. covalent in CCl₄ and electrovalent in CaH₂
3. electrovalent in CCl₄ and covalent in CaH₂
4. covalent in both CCl₄ and CaH₂

Answer: (b)

3. CCl₄ is insoluble in water because

1. CCl₄ is nonpolar and water is polar
2. water is nonpolar and CCl₄ is polar
3. water and CCl₄ are both polar
4. none

Answer: (a)

4. Which is not an exception to octet rule?

1. BF₃
2. SnCl₄
3. BeI₂
4. ClO₂

Answer: (b)

5. The compound with the lowest melting point is

1. AlF₃
2. AlCl₃
3. AlBr₃
4. AlI₃

Answer: (d)

6. A solid substance is soft, has a low melting point and is a poor conductor of electricity. The substance is most likely

1. an ionic solid
2. network solid
3. a metallic solid
4. a molecular solid

Answer: (d)

7. By applying a Silver Nitrate solution to pure carbon tetrachloride

1. a white precipitate soluble in ammonia is obtained
2. a curdy precipitate insoluble in ammonia is obtained
3. a pale yellow precipitate is obtained
4. no precipitate is obtained

Answer: (d)

8. The rate of reaction of organic compounds is slow due to

1. ionic bonding
2. amphoteric nature
3. covalent bonding
4. coordinate covalent bonding

Answer: (c)

9. The self linking ability of carbon is called

1. catenation
2. sublimation
3. hydrogenation
4. carbonation

Answer: (a)

10. Almost 95% of compounds are of carbon because they can form

1. single bonds
2. double bonds
3. triple bonds
4. multiple bonds

Answer: (d)