General Science: Questions and Answers
(Chapter: 05)
121. Iron coated with _________ is called galvanized iron.
Ans: Zinc
122. Compounds of _________ are used as cooling agents in refrigerators.
Ans: Flourine
123. The most abundant metal in the earth crust is _________
Ans: Aluminium
124. Man-made elements are known as ________
Ans: Transuranics
125. Mendeleev’s periodic table is based on ________
Ans: Atomic weight
126. The first man-made element is _________
Ans: Technicium
127. The element used to increase the hardness of rubber is _______
Ans: Sulphur
128. The heaviest gaseous element is _______
Ans: Radon
129. The most chemically active element is ________
Ans: Flourine
130. Element extracted from monazite sand is _______________
Ans: Thorium.
131. The method used for refining metals containing volatile impurities is _______
Ans: Oxidation
132. ________ is the poorest conductor of heat.
Ans: Lead
133. ________ is used in atomic clocks.
Ans: Cesium
134. Pewter is an alloy of _______ and _______
Ans: Tin, Lead
135. The most plentiful mineral is ________
Ans: Felspar
136. Malachite is the mineral of _________
Ans: Copper
137. Element stored in Kerosene to prevent oxidation is _______
Ans: Sodium
138. __________ is used for making integrated chips.
Ans: Silicon and Germanium
139. __________ is the metal having highest melting point.
Ans: Tungsten
140. The father of the periodic table is ______
Ans: Mendeleev
141. ______ is known as laughing gas.
Ans: Nitrous Oxide
142. Dry Ice is _______
Ans: Solid Carbon dioxide
143. The most common element in the universe is _______
Ans: Hydrogen
144. The metal which regulates blood pressure in human beings is ______
Ans: Sodium
145. The natural element having highest atomic weight is _________
Ans: Uranium
146. The lightest and simplest element (gas) is _______
Ans: Hydrogen
147. ________ are chemicals that can be applied to living tissues to destroy microorganism.
Ans: Antiseptics
148. Water-gas is a mixture of carbon monoxide and ________
Ans: Hydrogen
149. Ferrous Sulphate crystals are known as _______
Ans: Green Vitriol
150. _______ are the chemicals used to bring down body temperature.
Ans: Antipyretics
151. ________ is known as Bathing Salt.
Ans: Sodium Carbonate
152. Coral reefs are made of _______
Ans: Calcium Carbonate
153. Rat poison is _______
Ans: Zinc Phosphide
154. ________ is used to make artificial rain.
Ans: Silver iodide
155. _______ are chemicals used as medicine for mental disorders.
Ans: Tranquillizers
(Chapter: 05)
121. Iron coated with _________ is called galvanized iron.
Ans: Zinc
122. Compounds of _________ are used as cooling agents in refrigerators.
Ans: Flourine
123. The most abundant metal in the earth crust is _________
Ans: Aluminium
124. Man-made elements are known as ________
Ans: Transuranics
125. Mendeleev’s periodic table is based on ________
Ans: Atomic weight
126. The first man-made element is _________
Ans: Technicium
127. The element used to increase the hardness of rubber is _______
Ans: Sulphur
128. The heaviest gaseous element is _______
Ans: Radon
129. The most chemically active element is ________
Ans: Flourine
130. Element extracted from monazite sand is _______________
Ans: Thorium.
131. The method used for refining metals containing volatile impurities is _______
Ans: Oxidation
132. ________ is the poorest conductor of heat.
Ans: Lead
133. ________ is used in atomic clocks.
Ans: Cesium
134. Pewter is an alloy of _______ and _______
Ans: Tin, Lead
135. The most plentiful mineral is ________
Ans: Felspar
136. Malachite is the mineral of _________
Ans: Copper
137. Element stored in Kerosene to prevent oxidation is _______
Ans: Sodium
138. __________ is used for making integrated chips.
Ans: Silicon and Germanium
139. __________ is the metal having highest melting point.
Ans: Tungsten
140. The father of the periodic table is ______
Ans: Mendeleev
141. ______ is known as laughing gas.
Ans: Nitrous Oxide
142. Dry Ice is _______
Ans: Solid Carbon dioxide
143. The most common element in the universe is _______
Ans: Hydrogen
144. The metal which regulates blood pressure in human beings is ______
Ans: Sodium
145. The natural element having highest atomic weight is _________
Ans: Uranium
146. The lightest and simplest element (gas) is _______
Ans: Hydrogen
147. ________ are chemicals that can be applied to living tissues to destroy microorganism.
Ans: Antiseptics
148. Water-gas is a mixture of carbon monoxide and ________
Ans: Hydrogen
149. Ferrous Sulphate crystals are known as _______
Ans: Green Vitriol
150. _______ are the chemicals used to bring down body temperature.
Ans: Antipyretics
151. ________ is known as Bathing Salt.
Ans: Sodium Carbonate
152. Coral reefs are made of _______
Ans: Calcium Carbonate
153. Rat poison is _______
Ans: Zinc Phosphide
154. ________ is used to make artificial rain.
Ans: Silver iodide
155. _______ are chemicals used as medicine for mental disorders.
Ans: Tranquillizers
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