Online Chemical Engineering Test - Stoichiometry Test

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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CaCO₃ contains __________ percent of Ca by weight.

[#]

In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the

solute concentration

temperature

both(a) & (b)

neither (a) nor (b)

[#]

Number of gram equivalent of solute dissolved in one litre of solution is called its

normally

molarity

molality

formality

[#]

The net heat evolved or absorbed in a chemical process, i.e. total change in the enthalpy of the system is independent of the

temperature & pressure.

number of intermediate chemical reactions involved.

state of aggregation & the state of combination at the beginning & the end of the reaction.

none of these.

[#]

Kinematic viscosity of 1 m² /second is equivalent to __________ stokes.

10²

10³

10⁴

[#]

With rise in temperature, the solubility of ammonia in water at a fixed pressure

increases

decreases

remains unchanged

increases exponentially

[#]

Enthalpy of a vapor gas mixture may be increased by increasing the

temperature at constant humidity.

humidity at constant temperature.

temperature and the humidity.

all (a), (b) & (c).

[#]

Which of the following ideal gas laws are not applicable to mixture of gases ?

Amgat's law

Dalton's law

Boyle's law & Charle's Law

none of these

[#]

Which of the following is insensitive to changes in pressure ?

Heat of vaporisation

Melting point

Heat of fusion

Both (b) and (c)

[#]

10.

Pick out the correct statement.

Heat of solution is always positive.

At equilibrium, ΔG is zero.

For the reaction, PCl₅

PCl₃ + Cl₂, ΔG is less than ΔE

The heating of water in a beaker is an example of an isolated system.

[#]

11.

In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.

kg of solute/kg of solvent

kg-mole of solute/kg-mole of solvent

kg-mole of solute/1000 kg of solvent

all (a), (b) & (c)

[#]

12.

Claussius Clapeyron equation applies to the __________ process.

sublimation

melting

vaporisation

all (a), (b) & (c)

[#]

13.

Pick out the correct conversion.

1 BTU =453.6 calories

1 BTU = 252 calories

1 calorie = 252 BTU

1 calorie = 453.6 BTU

[#]

14.

A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal

kinetic energy.

intermolecular forces of attraction.

potential energy.

total energy.

[#]

15.

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

5.3

106

10.6

[#]

16.

1 kg/cm² is equal to

760 torr

1KPa

10 metres of water column

1 metre of water column

[#]

17.

One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m³. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m³. The amount of water vapour condensed (in kg) is

0.0

0.065

0.1

1.0

[#]

18.

Recycling in a chemical process facilitates

increased yield

enrichment of product

heat conservation

all (a), (b) &(c)

[#]

19.

Which of the following gravity scales is used exclusively for liquids heavier than water ?

Baumme scale

Twaddel scale

API scale

none of these

[#]

20.

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

C₄H₉OH

C₃H₂₁OH

(C₂H₄)₂H₂.OH

C₂H₃₃OH

[#]

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