STOICHIOMETRY QUIZ

The crystallisation of a solute from a solution may be done by

Change of temperature thereby causing supersaturation

Removal of pure solvent by evaporation

Changing the nature of the system by the addition of a more soluble material

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

A sugar solution containing __________ percent sugar is equivalent to 1 Brix.

1

10

0.1

0.01

TRUE ANSWER : ?
YOUR ANSWER : ?

The increase in the temperature of the aqueous solution will result in decrease of its

Mole fraction of the solute

Molarity

Weight % of the solute

Molality

TRUE ANSWER : ?
YOUR ANSWER : ?

Validity of the relationship, inputs = outputs, holds good for the system at steady state

None of these

With chemical reaction

Without chemical reaction & losses

Without chemical reaction

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1 kg of calcium carbide (CaC₂) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour?

15

10

5

20

TRUE ANSWER : ?
YOUR ANSWER : ?

At a temperature of 0°K, the molecules of a gas have only __________ energy.

Rotational

None of these

Vibrational

Translational

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Recycling in a chemical process facilitates

All of these

Heat conservation

Enrichment of product

Increased yield

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat of reaction is a function of the

Neither (a) nor (b)

Pressure

Both(a)&(b)

Temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the

Theoretical equations

Experimental data

Phase rule

Emperical equations

TRUE ANSWER : ?
YOUR ANSWER : ?

pH value of an alkaline solution is

< 7

Constant over a wide range

> 7

7

TRUE ANSWER : ?
YOUR ANSWER : ?

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