9th Class Chemistry Chapter 11 TestHydrocarbons

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The ability of carbon atoms to form chains is called:

   1. Isomerism

   2. Catenation

   3. Resonance

   4. Condensation

2. Simplest family of organic compounds is:

   1. Carbohydrates

   2. Proteins

   3. Oils

   4. Hydrocarbons

3. Which product will be formed when ethyl bromide (CH₃ CH₂ Br) is treated with Zn / HCI:

   1. CH₄

   2. CH₃ - CH₃

   3. CH₃ - CH₂ - CH₂ - CH₃ 

   4. CH₃ - CH₂ - CH₃

4. Which of the following is considered as parent organic compound?

   1. Alkanes

   2. Alkenes

   3. Alkynes

   4. Aromatics

5. Chemical formula of methane is:

   1. C₂H₆

   2. CH₄

   3. CH₂CI

   4. CnH_2n+1

6. The formula of pentane is:

   1. C₅H₁₂

   2. C₅H₁₀

   3. C₅H₈

   4. C₅H₁₄

7. Alkane do not react in:

   1. Diffused sunlight

   2. Bright sunlight

   3. Dark

   4. None of these

8. Which other metal can be used to reduce alkyl halides?

   1. Al

   2. Mg

   3. Ni

   4. Co

9. Why does a mixture of zinc and hydrogen acid acts as a reducing agent?

   1. Because zinc acts as a reducing agent

   2. Because atomic hydrogen is produced with Zn / CHI which acts as a reducing agent 

   3. Because molecular hydrogen is produced with Zn / CHI which acts as a reducing agent

   4. Because chlorine ions are produced with Zn / CHI which acts as a reducing agent

10. Carbon is present in periodic table:

    1. Left side

    2. Right side

    3. Middle

    4. None of these