Question # 1

When solid KI dissolved in water, its heat of solution is positive. What would happen to dissolution when temperature is increased.

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Increases

Decreases

Remain same

Firs increases than decreases

The law of mass action was given by

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D.C. down and P wage

Gay Lussic and C.M

C.M Goldberg and P. Waage

Hendeson and Le Chateller's

Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities.

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Filtration

Crystallization

Common ion effect

Chromatography

When HCl is added to H2S aqueous solution, Its ionization

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Decrease

Increase

Remains constant

First increases than decreases

pKa of CH3COOH is 4.74. The pKb value of CH3COO- ions will be

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7

14

9.26

zero

For the equilibrium system N2 + O2 + Heat = 2NO the equilibrium constant deceases by

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Decreasing the temperature

Adding a catalyst

Adding N2

Adding NO

The pK_avalue of CH₃COOH is 4.74 when we mix CH₃COOH and CH₃COONa in the ratio of 10:1, tehn the pH of the buffer is

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4.74

5.74

3.74

7.00

Optimum pressure in Haber's process for synthesis of Ammonia is

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100 -150 atm

200- 300 atm

350 - 450 atm

500 - 600 atm

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

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the substance which increase the rate of reaction but remains unchanged at the end of the reaction is called.

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Indicator

Promoter

Catalyst

Activated complex

Almost forward reaction is complete when value of Kc is

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very high

Very small

Neither large nor very small

No correlation

Which acid has less value of pKa.

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CH3COOH

H2S

H2CO3

HCl

The pH of 10-3 mole dm-3 of an aqueous solution of H2SO4 is.

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3.0

2.7

2.0

1.5

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