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Quiz (Chem 242)

Total questions: 15

Worksheet time: 4hrs 45mins

Name
Class
Date
1.

The Solubility of two partially miscible liquids of phenol-water system is depends on two factors :..............&...........

a)

Temperature & pressure

b)

Volume & pressure

c)

Temperature & Concentration of phenol in water

2.

................. is defined as that particular ratio of components in a mixture that has the lowest freezing point.

a)

Critical point

b)

Eutectic point

c)

Boiling point

3.

In phenol-water system, If the %composition of phenol at critical Temperature is 33%

The % composition of water at critical temperature is ...........

a)

67%

b)

0.33%

c)

70%

4.

To convert the molar concentration (mol/L) to unit (g/L) by multiplying in .................

a)

number of moles (n)

b)

103

c)

Molecular weight (M.wt)

5.

For Ternary system, we have three components.If the system of only one phase,The degree of freedom F=

a)

3

b)

4

c)

5

6.

The liquids are completely dissolve in each other to form homogeneous solution called .............. liquids.

a)

Immiscible liquids

b)

miscible liquids

c)

partially miscible liquids

7.

The degree of freedom at constant pressure ......................

a)

F=C-P+2

b)

F=C-P+3

c)

F=C-P+1

8.

Plot a graph of % phenol against miscibility temperature.The graph is ...................

a)

Triangular

b)

Straight line

c)

bell-shaped

9.

If Distribution co-efficient smaller than one (D<1),This mean that concentration of substance in aqueous layer ............... than concentration in organic layer.

a)

smaller

b)

greater

c)

equal

10.

In the first order reaction,we determine the rate constant by plotting the relation between ln[A] and " t " and slope should be equal ...........

a)

K

b)

-K

c)

1/K

11.

Hydrolysis of ethyl acetate in acidic solution produces two product are ....................&...............

a)

CH3COOH + CH3CH2OH

b)

CH3COOH + H2O

c)

CH3CH2OH + H2O

12.

What is the half life (t1/2) of N2O5 if it decomposes with a rate constant of 5.7x10-4 S-1 ?

a)

8.22 X 10-4 Second

b)

1216.05 Second

c)

1121.05 Second

13.

Drive Integrated rate equation for first-order reaction ?

a)

-

b)

-

c)

-

14.

Solve this question on paper

a)

-

b)

-

c)

-

15.

Solve this question on paper

a)

-

b)

-

c)

-