961. Ketones are comparatively less reactive than aldehydes. It is due to?
A: Alkyl groups are electron-donating
B: Steric hindrance
C: Both A and B
D: None
962. Which of the following is not a use of formaldehyde?
A: In a silvery mirror
B: In making medicine urotropine
C: In making throat lozenges
D: In making acetic acid
963. Which of the following is not a use of acetaldehyde?
A: Formation of phenolic resins
B: Formation of a mirror
C: Antiseptic inhalant
D: Formation of throat lozenges
964. Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield?
A: Nylon 66
B: Urotropine
C: Aniline formaldehyde plastic
D: Bakelite
965. Which of the following will not give an addition reaction with NaHSO3?
A: HCHO
B: CH3CHO
C: CH3-CH2-CHO
D: None of the above
966. Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide?
A: Carbonic acid
B: Ethanol
C: Acetic acid
D: Methanoic acid
967. Gas used for artificial fruit ripening of green fruit is?
A: Acetylene
B: Ethylene
C: Methane
D: Ethane
968. Where does the oxygen that keeps us alive come from?
A: Carbonates absorbed from soil
B: Carbon dioxide
C: Oxides of minerals
D: Water
969. Fertilizer having high nitrogen content is?
A: Ammonium sulphate
B: Urea
C: Ammonium nitrate
D: Calcium citrate
970. Commercial nitric acid is coloured because it contains dissolved?
A: Nitrous oxide
B: Oxygen
C: Nitrogen dioxide
D: Coloured impurities
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