1. A hydrocarbon has four carbon atoms. Give its molecular formula if it is an alkene. ?

C4H4

C4H6

C4H8

C4H10

Answer: C4H6

Explanation:


2. Name the functional group present in CH3COCH3 ?

Aldehyde

Carboxylic acid

Alcohol

Ketone

Answer: Ketone

Explanation:


3. The blindness and death is caused by consuming adultrated liquor contains ?

CH3CHO

CH3COCH3

CH3OH

CH3COOH

Answer: CH3OH

Explanation:

Methanol causes blindness and even death.


4. Which of the following represents saponification reaction ?

2CH3COOH + 2Na ? 2CH3COONa + H2

CH3COOC2H5 + NaOH ? CH3COONa + C2H5OH

CH3COOH + C2H5OH + H2SO4 ? CH3COOC2H5 +H2O

CH3COONa + NaOH + CaO ? CH4 + Na2CO3

Answer: CH3COOC2H5 + NaOH ? CH3COONa + C2H5OH

Explanation:

In saponification reaction, when an ester is heated with sodium hydroxide solution, ester gets hydrolysed (breaks down) to form the parent alcohol and sodium salt of carboxylic acid.


5. Consider the following statements and choose the correct one ?

An unsaturated hydrocarbon in which the two carbon atoms are connected by a double bond is called an alkene.

An unsaturated hydrocarbon in which the two carbon atoms are connected by a triple bond is called an alkyne.

The group formed by the removal of one hydrogen atom from an alkane molecule is called an alkyl group.

All the above.

Answer: All the above.

Explanation:

all the statements are correct. Hence, your answer will be option [D]


6. Which of the given can be used for the denaturation of ethyl alcohol ?

Copper sulphate

Methyl alcohol

Pyridines

All of these

Answer: All of these

Explanation:

All of these


7. Butanone is a four carbon compound with functional group ?

aldehyde

alcohol

carboxylic acid

ketone

Answer: ketone

Explanation:


8. Ionic compounds have does not show below property ?

Conduction of electricity in solid state

Conduction of electricity in molten state

High boiling point

High melting point

Answer: Conduction of electricity in solid state

Explanation:


9. Subsequent members of homologous series differ by how many atomic mass units ?

28

14

24

16

Answer: 14

Explanation:


10. The isomeric pair is ?

Butane and 2-methylpropane

Ethane and ethane

Propane and butane

Ethane and propane

Answer: Butane and 2-methylpropane

Explanation: