In the reaction, represented by Na2CO3 + HC1 → NaHO3 + NaCl, the equivalent weight of Na2CO3 is________________?

A. 53
B. 5.3
C. 106
D. 10.6

Thermal diffusivity of a refractory brick is high, when its ______________ is high?

A. Density
B. Specific heat
C. Thermal conductivity
D. None of these

In the reaction, Ca + 2H2O = Ca(OH)2 + H2; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water ? (Atomic weight of calcium = 40) ?

A. 4480
B. 2240
C. 1120
D. 0.4

Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the______________________?

A. Same elevation in boiling point
B. Different elevation in boiling point
C. Elevation in boiling point in the ratio of their molecular weights
D. None of these

1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is__________________?

A. C4H9OH
B. C3H21OH
C. (C2H4)2H2.OH
D. C2H33OH

Pure oxide refractories are generally monocrystalline in nature and are self bonded ______________ bricks are generally used as moderator in nuclear reactors?

A. Beryllia
B. Carborundum
C. Corundum
D. Thoria

The number of H+ in 1 c.c solution of pH 13 is__________________?

A. 6.023 × 1013
B. 6.023 × 1010
C. 6.023 × 107
D. 1013

Viscosity of 1 centipoise is equal to 1 Centistoke in case of________________?

A. Water
B. Mercury
C. Carbon tetrachloride
D. None of these

The value of the gas-law constant ‘R’ is 1.987 ?

A. kcal/kg-mole.°C
B. Btu/lb-mole.°R
C. kcal/kg-mole.°K
D. Both B. & C.

Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half will result in _____________ in the volume of the gas?

A. No change
B. Doubling
C. 1/4th reduction
D. Fourfold increase