10th Class Chemistry Chapter 9 TestHYDROCARBONS

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

1. Gasoline has range of carbon atoms:

   1. 1–4

   2. 5–6

   3. 6–10

   4. 10–14

2. What equipment is used to extract liquid petroleum after the flow of gases ceases?

   1. Pumps

   2. Drills

   3. Filters

   4. Burners

3. is a boiling range of:

   1. Diesel oil

   2. Kerosene oil

   3. Gasoline

   4. Fuel oil

4. Hydrocarbon fractions with high boiling points condense in which part of the column?

   1. In the lower part

   2. At the very top

   3. Outside the column

   4. They never condense

5. An increase in the molecular mass of a hydrocarbon strengthens its:

   1. Covalent bonds

   2. Intermolecular forces

   3. Volatility 

   4. Flammability 

6. Which of the following condition is required for the dehydration of ethanol to produce ethene?

   1. Alcoholic KOH at 180°C

   2. Dilute H₂SO₄ at 100°C

   3. Concentrated H₂SO₄ at 180°C

   4. Nickel catalyst at 150°C

7. It is the fracturing having a boiling point :

   1. Fuel oil

   2. Diesel oil

   3. Bitumen

   4. Lubricating oil

8. The chemical reactivity of alkenes is due to the presence of a:

   1. Carbon-oxygen double bond

   2. Carbon-carbon single bond

   3. Carbon-carbon double bond

   4. Carbon-hydrogen single bond

9. Lubricating oil has a range of carbon atoms:

   1. 6–10

   2. 14–19

   3. 19–35

   4. Above 35

10. Which colour of bromine is discharged when it reacts with an alkene?

    1. Reddish brown

    2. Purple

    3. Blue

    4. Green