Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of ______________ °C?

Byadmin March 4, 2019August 24, 2021

Spalling of silica bricks occurs due to abrupt volume changes, when it is cooled below a temperature of ______________ °C?

A. 770
B. 570
C. 270
D. 70

Stoichiometry

2 litres of nitrogen at N.T.P. weighs ______________ gms ?

2 litres of nitrogen at N.T.P. weighs ______________ gms ?

A. 14
B. 2.5
C. 28
D. 1.25

Read More 2 litres of nitrogen at N.T.P. weighs ______________ gms ?
Stoichiometry

Cp – Cv for an ideal gas is equal to________________?

Cp – Cv for an ideal gas is equal to________________?

A. R
B. R/2
C. 2R
D. 3R

Read More Cp – Cv for an ideal gas is equal to________________?
Stoichiometry

The depression in freezing point of a solution is________________?

The depression in freezing point of a solution is________________?

A. Inversely proportional to the mass of solvent
B. Directly proportional to the mole of solute
C. Both A. and B.
D. Neither A. nor B.

Read More The depression in freezing point of a solution is________________?
Stoichiometry

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

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

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

The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?

The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?

A. H2O > C2H5OH > CS2
B. CS2 > C2H5OH > H2O
C. H2O > CS2 > C2H5OH
D. CS2 > H2O > C2H5OH

Read More The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?
Stoichiometry

Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________?

Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________?

A. Are held together by stronger inter-molecular forces
B. Move faster
C. Have no definite shape
D. Are heavier

Read More Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________?

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