91. In order to be called steel, an alloy should have iron percentage greater than
92. Carbon percentage is the same in cast iron and
93. Which one contains the least percentage of carbon?
94. Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys.
95. The purpose of nitriding the steel is to
96. Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of
97. Pick out the wrong statement
98. A material capable of undergoing large permanent deformation, when subjected to tension is termed as
99. Which one occupies the lowermost position in the electromotive series of metals?
100. Carbon is present in the uncombined (graphitic) form in case of
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