Q91. Which of the following carbon compounds is used as a fire- extinguisher?
[A] Methylene chloride
[B] Carbon tetrachloride
[C] Carbon disulphide
[D] Chloroform
Q92. What is the bond angle (in degrees) in the structure of a benzene molecule?
[A] 120
[B] 60
[C] 150
[D] 90
Q93. Which one of the following is used to induce artificial rain?
[A] Ammonium chloride
[B] Potassium Nitrate
[C] Silver lodide
[D] Calcium carbonate
Q94. Which element has similar properties to Beryllium?
[A] Calcium
[B] Manganese
[C] Both A & B
[D] Helium
Q95. The Most Abundant Rare Gas in the Atmosphere is
[A] Ar
[B] Xe
[C] He
[D] Ne
Q96. Positive ions are formed from neutral atoms by loss of
[A] nuclear charge
[B] neutrons
[C] electrons
[D] protons
Q97. The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA ?
[A] 2nd
[B] 1st
[C] 3rd
[D] 4th
Q98. Which of the following acids is present in ant bites?
[A] Formic acid
[B] Nitric acid
[C] Malic acid
[D] Perchloric acid
Q99. Curdling of milk is an example of
[A] Inversion
[B] Coagulation
[C] Denaturation
[D] Hydrolysis
Q100. Which one of the following is a natural colloid?
[A] Sodium chloride solution
[B] Urea solution
[C] Blood
[D] Cane sugar solution