Organic Basics — Set 4
Chemistry · कार्बनिक रसायन · Questions 31–40 of 50
Which of the following is the most abundant organic compound on Earth?
Correct Answer: A. Cellulose
• **Cellulose** = Cellulose is the primary structural component of the cell walls of green plants. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Starch; C: Glucose; D: Methane
What is the common name of the carboxylic acid found in lemons?
Correct Answer: D. Citric acid
• **Citric acid** = Citric acid is a weak organic acid that gives citrus fruits their characteristic sour taste. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Acetic acid; B: Tartaric acid; C: Lactic acid
Which functional group is present in the class of compounds known as ethers?
Correct Answer: C. -O-
• **-O-** = Ethers are characterized by an oxygen atom connected to two alkyl or aryl groups. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: -CHO; B: -OH; D: -COOH
Which polymer is used for making parachutes and ropes due to its high tensile strength?
Correct Answer: D. Nylon
• **Nylon** = Nylon is a synthetic polyamide fiber known for its exceptional strength and elasticity. • **first** — It was the first fully synthetic fiber ever produced • 💡 Wrong-option analysis: A: Polythene; B: Rayon; C: Terylene
The main constituent of natural rubber is?
Correct Answer: D. Isoprene
• **Isoprene** = Natural rubber is a polymer of isoprene (2-methyl-1,3-butadiene). • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Neoprene; B: Chloroprene; C: Butadiene
Which of the following acids is present in tamarind?
Correct Answer: B. Tartaric acid
• **Tartaric acid** = Tartaric acid provides the distinct sourness to tamarind and grapes. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Citric acid; C: Acetic acid; D: Oxalic acid
What is the chemical name of the explosive RDX?
Correct Answer: B. Cyclonite
• **Cyclonite** = RDX is a powerful explosive and its chemical name is cyclotrimethylenetrinitramine. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Trinitrotoluene; C: Picric acid; D: Nitrocellulose
Which organic compound is used to denature ethanol to make it unfit for drinking?
Correct Answer: D. Methanol
• **Methanol** = Methanol is added to ethanol to create denatured alcohol for industrial use. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Benzene; B: Acetone; C: Chloroform
The sweet smell of fruits is primarily due to?
Correct Answer: B. Esters
• **Esters** = Esters are volatile organic compounds formed from the reaction of acids and alcohols. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Alcohols; C: Ethers; D: Aldehydes
Which compound is known as 'Aspirin'?
Correct Answer: C. Acetylsalicylic acid
• **Acetylsalicylic acid** = Acetylsalicylic acid is the active ingredient in aspirin, used to treat pain and fever. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Methyl salicylate; B: Phenyl salicylate; D: Ethyl salicylate