Hydrocarbons

Written by Dr. Ayesha Nadeem (Chemistry)

Class 10 · Chemistry · 10 questions

Name: ____________________ Date: ____________

The general formula of alkanes is:
- A CnH2n-2
- B CnH2n
- C CnH2n+2
- D CnHn
The simplest alkene is:
- A Propane
- B Ethene
- C Methane
- D Ethyne
Which hydrocarbon has a triple bond?
- A Ethene
- B Ethyne
- C Methane
- D Ethane
Alkenes decolourise bromine water because they are:
- A Acidic
- B Unsaturated
- C Saturated
- D Ionic
Complete combustion of methane gives:
- A Carbon and water
- B Carbon dioxide and water
- C Methanol
- D Carbon monoxide and hydrogen
The number of carbon atoms in propane is:
- A 3
- B 4
- C 2
- D 5
The number of hydrogen atoms in ethene, C2H4, is:
- A 6
- B 2
- C 8
- D 4
Polythene is made from many molecules of:
- A Ethane
- B Methane
- C Ethene
- D Ethyne
The general formula of alkenes is:
- A CnH2n+2
- B CnH2n
- C CnHn
- D CnH2n-2
Natural gas is mainly:
- A Benzene
- B Butane
- C Methane
- D Ethene

Answer key

1. C, 2. B, 3. B, 4. B, 5. B, 6. A, 7. D, 8. C, 9. B, 10. C