Q81. Which acid is produced when milk gets sour?
[A] Acetic acid
[B] Lactic acid
[C] Butyric acid
[D] Tartaric acid
Q82. In nuclear reactors, which of the following is used as moderator?
[A] Graphite
[B] Uranium
[C] Platinum
[D] Iron
Q83. Which of the following can be used as a catalyst in Hydrogenation reaction?
[A] Iron
[B] Palladium
[C] Barium
[D] Tungsten
Q84. What are long chains of Carbon Molecules called?
[A] Hydrocarbons
[B]Â Polymers
[C] Ribosomes
[D] None
450+ Chemistry Quiz Questions and Answers
Q85. __________ extinguishes fire.
[A] co2
[B] No2
[C] So2
[D] o2
Q86. Choose the pure substance from the list below.
[A] Lemonade
[B] Sea water
[C] Sugar
[D] Air
Q87. The particle with 13 protons and 10 electrons is
[A] Al3+ ion
[B] nitrogen isotope
[C] Al -atom
[D] None of these
Q88. Which bond has the greatest ionic character?
[A] H-O
[B] H-N
[C] H-Cl
[D] H-F
Q89. The metal which reacts most violently with with cold water is
[A] sodium
[B] calcium
[C] potassium
[D] magnesium
Q90. Most commonly used bleaching agent is
[A] Carbon dioxide
[B] Chlorine
[C] Sodium Chloride
[D] Alcohol