Organic Basics — Set 5
Chemistry · कार्बनिक रसायन · Questions 41–50 of 50
The primary component of coal gas is?
Correct Answer: A. Hydrogen
• **Hydrogen** = Coal gas is a mixture mainly consisting of hydrogen, methane, and carbon monoxide. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Carbon monoxide; C: Methane; D: Nitrogen
Which substance is used as a preservative for biological specimens?
Correct Answer: A. Formalin
• **Formalin** = Formalin is a 40% aqueous solution of formaldehyde. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Ethanol; C: Chloroform; D: Ether
Which hydrocarbon is the main constituent of 'Gobars gas' (Biogas)?
Correct Answer: A. Methane
• **Methane** = Biogas typically contains 50% to 75% methane, along with carbon dioxide. • (Contextual detail from explanation) • 💡 Wrong-option analysis: B: Propane; C: Ethane; D: Butane
Which organic compound is used in the preparation of dynamite?
Correct Answer: B. Glycerol
• **Glycerol** = Glycerol reacts with nitric acid to form nitroglycerin, the explosive component of dynamite. • **Nobel** — Alfred Nobel stabilized nitroglycerin using an absorbent material to create d... • 💡 Wrong-option analysis: A: Methyl alcohol; C: Glycol; D: Ethyl alcohol
Which functional group is present in the compound known as Carbolic acid?
Correct Answer: B. -OH
• **-OH** = Carbolic acid is the common name for Phenol, which has an -OH group attached to a benzene ring. • **first** — It was the first antiseptic used in surgery by Joseph Lister • 💡 Wrong-option analysis: A: -CO-; C: -COOH; D: -CHO
What is the monomer of the synthetic polymer PVC?
Correct Answer: A. Vinyl chloride
• **Vinyl chloride** = PVC stands for polyvinyl chloride, which is made by the polymerization of vinyl chloride. • **third** — It is the third-most widely produced synthetic plastic polymer • 💡 Wrong-option analysis: B: Ethylene; C: Tetrafluoroethylene; D: Propylene
Which organic gas was used as a chemical weapon in World War I?
Correct Answer: C. Mustard gas
• **Mustard gas** = Mustard gas is an organic sulfur compound that causes severe blistering of the skin and lungs. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Methane; B: Butane; D: Ethylene
The primary organic acid present in apples is?
Correct Answer: B. Malic acid
• **Malic acid** = Malic acid is a dicarboxylic acid that contributes to the tart taste of apples. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Formic acid; C: Citric acid; D: Oxalic acid
Which chemical is used to give a distinct odor to odorless natural gas?
Correct Answer: C. Ethyl mercaptan
• **Ethyl mercaptan** = Ethyl mercaptan (ethanethiol) has a very strong and unpleasant smell like rotten cabbage. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: Methane; B: Benzene; D: Ethanol
Which of the following describes the functional group of a carboxylic acid?
Correct Answer: B. -COOH
• **-COOH** = The carboxyl group (-COOH) consists of a carbonyl group and a hydroxyl group. • (Contextual detail from explanation) • 💡 Wrong-option analysis: A: -OH; C: -CHO; D: -CO-