Hydrocarbons

Q.

Carbon compounds that are made up of only carbon and hydrogen are called hydrocarbons.

1. True

2. False

Q.

Graphite is the purest form of carbon.

1. True
2. False

Q.

List any two uses of (i) coal (ii) petroleum

Q.

Why was it important for air or oxyzen to remain absent for the formation of petroleum products?

Q. energy sources are naturally replenished.

1. Renewable
2. Non-renewable
3. Conventional

Q.

Name three main type of pollution.

Q. What do you mean by catenation?

Q. What is chlorofluorocarbons ?

Q. The valency of carbon is___

Q. Which of the following is suitable for coating dress materials of firefighters?

1. Melamine
2. Nylon
3. Polyester
4. Acrylic

Q. Which of the following resources are inexhaustible?

1. Water
2. Coal
3. Geothermal
4. LPG
5. Wind
6. CNG
7. Solar
8. Petroleum
9. Hydroelectric
10. Crude Oil

Q.

Name the hardest known natural substance.

Q. Which of the following are true regarding hydrocarbons?

1. Hydrocarbons are produced due to complete combustion of fuel used in automobiles.
2. Hydrocarbons are carcinogenic.
3. Hydrocarbons harm plants by causing ageing, shading of leaves, flowers and twigs.
4. All of the above

Q. Most hydrocarbons from petroleum are obtained by

1. vaporisation
2. fractional distillation
3. fractional crystallisation
4. isomerisation

Q. Which of the following are different types of energy?

1. Light
2. Oil
3. Petroleum
4. Heat
5. Coal
6. Natural gas
7. Sound
8. Chemical
9. Potential
10. Water

Q. Hydrocarbons burn to produce

1. ${\text{CO}}_2$ and ${\text{H}}_2\text{O}$
2. ${\text{CO}}_2$
3. ${\text{CO}}_2$ and ${\text{O}}_2$
4. ${\text{CO}}_2$ and ${\text{H}}_2$

Q. Identify the fossil fuels from the given options.

1. Coal
2. Water
3. Crude oil
4. Solar
5. Natural gas
6. Wind
7. Petroleum
8. Biomass
9. LPG

Q. Which one of the following is a thermosetting plastic?

1. Polyethene
2. Bakelite
3. Acrylic
4. PET

Q. Most amount of fossil fuels is used in the .

1. vehicles
2. domestic purpose
3. industries