At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ?

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1 BTU/lb.←°F is equivalent to ____________ kcal/kg.°C?

A. 1 B. 2.42 C. 1.987 D. 4.97...

Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?

A. Thermal spalling B. Slag attack C. Fusion under load D. CO attack...

Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?

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S.T.P. corresponds to _________________?

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In a neutral solution _________________?

A. H+ ions are absent B. OH- ions are absent C. Both H+ and OH- ions are present in very small but equal concentration D. None of these...