CBSE Class 10 Science Carbon and Its Compounds Quiz 2

1. A reagent which can help us to distinguish between alkenes and alkynes is:

A Bromine water B Carbon tetrachloride C Alkaline KMnO D Ammoniacal cuprous chloride

2. The correct structural formula of butanoic acid is
MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers 1

A a B b C c D d

3. The soap molecule has a

A hydrophilic head and a hydrophobic tail B hydrophobic head and a hydrophilic tail C hydrophobic head and a hydrophobic tail D hydrophilic head and a hydrophilic tail

4. Detergents can be used for washing of clothes

A only in hard water B only in soft water C both in soft and hard water D None of the above

5. Which among the following are unsaturated hydrocarbons?
MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers 2

A (i) and (iii) B (ii) and (iii) C (ii) and (iv) D (iii) and (iv)

6. Acetic acid was added to a solid X kept in a test tube. A colourless, odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that

A solid X is sodium hydroxide and the gas Y is CO₂ B solid X is sodium bicarbonate and the gas Y is CO₂ C solid X is sodium acetate and the gas Y is CO₂ D solid X is sodium bicarbonate and the gas Y is SO₂.

7. Pentane has the molecular formula C₅H₁₂. It has

A 5 covalent bonds B 12 covalent bonds C 16 covalent bonds D 17 covalent bonds

8. Structural formula of ethyne is
MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers 3

A a B b C c D d

9. A student while observing the properties of acetic acid would report that this smells like

A vinegar and turns red litmus blue B rotten egg and turns red litmus blue C vinegar and turns blue litmus red D rotten egg and turns blue litmus red

10. Vinegar is a solution of

A 50% – 60% acetic acid in alcohol B 5% – 8% acetic acid in alcohol C 5% – 8% acetic acid in water D 50% – 60% acetic acid in water