Chemistry- Questions and Answers 05
126. The gas usually filled in an electric bulb is —Answer: Nitrogen
127. Sodium burns in air to give-
Answer: Sodium peroxide
128. Which of the following elements is non-radioactive?
Answer: Zirconium
129. Heavy water is —
Answer: Deuterium oxide
130. Argon gas was discovered by-
Answer: William Ramsay
131. Most soluble in water is —
Answer: Sugar
132. One fathom is equal to–
Answer: 6 feet
133. According to Dalton’s atomic theory, the smallest particle which can exist independently is–
Answer: An atom
134. The gases used in different types of welding would include —
Answer: Oxygen & acetylene
135. Formaldehyde is the starting material for The manufacture of-
Answer: Bakelite
136. The recent atomic weight scale is based on–
Answer: 6C12
137. Which of the following alloys is used for making magnets?
Answer: Alnico
138. The phenomenon of “metamerism” is Shown by-
Answer: Methyl propyl ether and diethyl ether
139. The major ingredient of leather is–
Answer: Collagen
140. Chemically, vitamin C is __?
Answer: Ascorbic acid
141. If two liquids have widely different boiling Points, they may be separated by-
Answer: Fractional distillation
142. Glass is made from a mixture of–
Answer: Sand and silicates
143. Which of the following can be used as an anaesthetic?
Answer: Nitrous oxide
144. Which of the following is not an ore of Aluminium?
Answer: Azurite
145. Epoxy resins is used as–
Answer: Adhesives
146. Commercial acetic acid is used in the preparation of?
Answer: Vinegar
147. Most soluble in water is —
Answer: Sugar
148. One fathom is equal to–
Answer: 6 feet
149. An ice cube is floating on the surface of the water. How will the water level be affected by melting of this ice cube?
Answer: Water level will remain the same
150. Bromine is —
Answer: A red liquid.
151. Who discovered positrons?
Answer: Carl David Anderson
152. What is the unit for measuring the pitch or frequency of sound?
Answer: Decibel
153. Who measured the charge of an electron at first?
Answer: Robert Andrews Millikan
154. The metal used in storage batteries —
Answer: Lead
155. The fastest acting enzyme in the biological kingdom is–
Answer: carbonic anhydrase
156. Water has maximum density at —
Answer: –4°C
157. Lightening causes rainfall because–
Answer: It activates H2O molecule
158. Which one of the following is also called Stranger Gas?
Answer: Xenon
159. The chemical name of Uria is —
Answer: Carbamide
160. Nitrification means–
Answer: Convert the atmospheric nitrogen to an effective nitrogen compound.
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