Which of the following comprises of hydrocarbons ?

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In SO3 absorber (Contact Process), packing material used is of________________?

A. Cast iron B. Chemical stoneware C. Karbate D. Mild steel...

A hardness depth of about 3 mm can be achieved by induction hardness in ______________ seconds?

A. 5 B. 100 C. 250 D. 500...

Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?

A. Silicon steel B. Chromium steel C. Molybdenum steel D. None of these...

Metalloid is_______________________?

A. An element, which exhibits the properties of both metal & non metal B. Highly electronegative in nature C. An alloy D. All A., B. & C....

Which of the following is the softest material ?

A. Quartz B. Calcite C. Corundum D. Fluorite...