Chapter 8: Hydrocarbons Chemistry Mcqs for High School - Grade 10 - Set 5

1)   Trichloromethane is also called

a. chlorophyll
b. chloroplast
c. chloromethane
d. chloroform
Answer  Explanation 

ANSWER: chloroform

Explanation:
No explanation is available for this question!


2)   Loss of hydrogen halide from alkyl halide gives

a. alkenes
b. alkanes
c. alkynes
d. halogens
Answer  Explanation 

ANSWER: alkenes

Explanation:
No explanation is available for this question!


3)   The reaction of any substance with air is called

a. carbation
b. halogenation
c. sublimation
d. combustion
Answer  Explanation 

ANSWER: combustion

Explanation:
No explanation is available for this question!


4)   Vicinal dihalide eliminates two molecules of hydrogen halides from adjacent carbon atoms on treatment with

a. Zn dust
b. calcium hydroxide
c. alcoholic potassium hydroxide
d. calcium chloride
Answer  Explanation 

ANSWER: alcoholic potassium hydroxide

Explanation:
No explanation is available for this question!


5)   Which of the following is not true about alkynes?

a. they are unsaturated hydrocarbons
b. they are saturated hydrocarbons
c. they are non-polar
d. they dissolve readily in organic solvents
Answer  Explanation 

ANSWER: they are saturated hydrocarbons

Explanation:
No explanation is available for this question!


6)   In alkenes, the two carbon atoms forming double bond are joined to how many atoms?

a. one
b. two
c. three
d. four
Answer  Explanation 

ANSWER: three

Explanation:
No explanation is available for this question!


7)   What is the physical state of alkanes containing five to seventeen carbon atoms?

a. solid
b. liquid
c. gas
d. plasma
Answer  Explanation 

ANSWER: liquid

Explanation:
No explanation is available for this question!


8)   First three members of alkynes are

a. solids
b. liquids
c. gases
d. plasma
Answer  Explanation 

ANSWER: gases

Explanation:
No explanation is available for this question!


9)   Which of the following is not true about alkenes?

a. they are unsaturated hydrocarbons
b. they are insoluble in water
c. they are soluble in organic solvents such as alcohol
d. they are soluble in water
Answer  Explanation 

ANSWER: they are soluble in water

Explanation:
No explanation is available for this question!


10)   Which of the following is used in oxy-acetylene torches for welding and cutting metals?

a. Ethyne
b. ethene
c. ethane
d. methane
Answer  Explanation 

ANSWER: Ethyne

Explanation:
No explanation is available for this question!