Q1) Which element is the backbone of organic compounds?

a) Hydrogen

b) Carbon

c) Oxygen

d) Nitrogen

Q2) Which type of bond is primarily formed between carbon atoms in organic compounds?

a) Ionic bond

b) Covalent bond

c) Metallic bond

d) Hydrogen bond

Q3) Which of the following is not a characteristic of organic compounds?

a) They are primarily composed of carbon and hydrogen.

b) They can conduct electricity in the molten state.

c) They often have low melting and boiling points.

d) They can form long chains and branched structures.

Q4) What is the general formula of an alkane?

a) CnH2n

b) CnH2n+2

c) CnHn

d) CnHn-2

Q5) Which functional group is present in aldehydes?

a) -OH

b) -CHO

c) -COOH

d) -NH2

Q6) Which type of reaction involves the addition of a hydrogen halide to an alkene?

a) Substitution

b) Elimination

c) Addition

d) Oxidation

Q7) Which organic compound is responsible for the characteristic smell of vinegar?

a) Ethanol

b) Methanol

c) Acetic acid

d) Butanoic acid

Q8) Which type of isomerism occurs when compounds have the same molecular formula but different spatial arrangements?

a) Structural isomerism

b) Stereoisomerism

c) Geometric isomerism

d) Optical isomerism

Q9) What is the functional group of an alcohol?

a) -OH

b) -CHO

c) -COOH

d) -NH2

Q10) What is the name of the reaction where a large molecule is broken down into smaller molecules by the addition of water?

a) Substitution

b) Condensation

c) Hydrolysis

d) Dehydration

Q11) Which organic compound is the main component of natural gas?

a) Ethane

b) Methane

c) Butane

d) Propane

Q12) Which type of isomerism occurs when compounds have the same molecular formula but different arrangements of atoms in space?

a) Functional isomerism

b) Structural isomerism

c) Geometric isomerism

d) Optical isomerism

Q13) Which functional group is present in carboxylic acids?

a) -OH

b) -CHO

c) -COOH

d) -NH2

Q14) What is the name of the reaction where a compound gains oxygen or loses hydrogen?

a) Reduction

b) Oxidation

c) Substitution

d) Elimination

Q15) What is the general formula of an alkene?

a) CnH2n

b) CnH2n+2

c) CnHn

d) CnHn-2

Q16) Which functional group is present in amines?

a) -OH

b) -CHO

c) -COOH

d) -NH2

Q17) Which organic compound is commonly known as rubbing alcohol?

a) Ethanol

b) Methanol

c) Isopropanol

d) Butanol

Q18) What is the name of the reaction where two smaller molecules combine to form a larger molecule with the elimination of a small molecule like water?

a) Substitution

b) Condensation

c) Hydrolysis

d) Dehydration

Q19) Which functional group is present in ketones?

a) -OH

b) -CHO

c) -COOH

d) -NH2

Q20) What is the general formula of an alkyne?

a) CnH2n

b) CnH2n+2

c) CnHn

d) CnHn-2