CBSE - Carbon and its Compounds

1 Carbon and its Compounds 

Coal is called fossil fuel because :

(1) In future coal will become completely exhausted
(2) It was formed 300 million years ago
(3) Fossils are obtained along with mining of coal
(4) It was formed from the dead remains of living organisms

2 Carbon and its Compounds 

Which of the following substance is used for unsaturation test of hydrocarbons

(1) Br₂  solution 
(2) Baeyer's reagent 
(3) Ethylene glycol 
(4) A and B both

3 Carbon and its Compounds 

An organic compound 'A' on treating with acidified potassium dichromate solution gives 'B' with molecular mass 60 gm/mol. 'A' on heating with conc. H₂SO₄  of 443 K produces a gas that decolourless bromine water. The compound A is

(1) n-propyl alcohol
(2) iso-propyl alcohol
(3) ethyl alcohol
(4) acetaldehyde

4 Carbon and its Compounds 

The number of carbon atom in kerosene oil is

(1) C₆– C₁₁
(2) C₂₀ – C₃₀
(3) C₁₁ – C₁₆
(4) C₁₈ – C₂₂ 

5 Carbon and its Compounds 

Property of self-combination of the atoms of the same element to form long chains is known as

(1) Protonation
(2) Carbonation
(3) Coronation
(4) Catenation

6 Carbon and its Compounds 

The action of cleaning of oily dirt by soap is based on .......

(1) solubility in water
(2) hydrophilic property
(3) hydrophobic property
(4) presence of both hydrophilic and hydrophobic groups

7 Carbon and its Compounds 

Chemical formula of Teflon is-

(1) (-CF₂-CF₂-)_n 
(2)
(3) (-CH₂-CH₂-)_n
(4) None

8 Carbon and its Compounds 

An organic compound which is used to preserve biological specimen is 

(1) ether 
(2) methanal 
(3) ethanal 
(4) ethanol

9 Carbon and its Compounds 

Which of the following hydrocarbons have acidic hydrogen?
(1) CH₂=CH₂
(2)
(3) CH₄
(4) C₆H₆

10 Carbon and its Compounds 

The allotrope of carbon in amorphous form among the following is .......

(1) Diamond
(2) Graphite
(3) Buckministerfullerene
(4) Coal