General Science - 9

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

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PSC GENERAL SCIENCE QUESTIONS AND ANSWERS
1. General Science - Physics
2. General Science  Chemistry
3. General Science  Biology
4. General Science  Zoology
5. GENERAL SCIENCE - BOTANY
6. Every Day Science
7. General Science Questions and Answers

8. ARITHMETIC AND MENTAL ABILITY

9. Reasoning
10. Quantitative Aptitude

11. MATHS (SOLVED IN STEPS) => HCF & LCM <> PROFIT AND LOSS <> PROBLEMS ON TRAINS <> Problems on Age <> Problems on Average 

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