Question # 1

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

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

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dm⁺⁶mole^-2

mole²dm^-6

Mole dm^-3

Having no units

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 pH of human blood is

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7.0

7.4

4.0

6.5

A buffer solution can be prepared by mixing

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Weak acid and its salt with weak base

Weak base and its salt with strong acid

Strong acid and its salts with weak base

Strong base and its salt with weak acid

Catalyst used in preparation of NH3 from N2 and H2 is.

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Ni

Fe

Pt

V2O5

If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by

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Change of temperature

Change of pressure

Change of concentration

Catalyst

When concentration of one product is removed at equilibrium stage, in which direction it moves to reestablish equilibrium.

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Forward

Reverse

Neither forward nor reverse

Equally move in both direction

Buffer action can be explained by

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Common ion effect

Law of mass action

Le Chateller's principle

All above

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The value of K_pfalls with a rise in temperature

The value of K_pfalls with increasing pressure

Adding V₂O₅catalyst increase the equilibrium yield of sulphur trioxide

The value of K_pis equal to K_c

The unit of Kc for the reaction N2 +O2 = 2NO will be

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mol dm-3

mol-1 dm+3

mol-2 dm+6

No units

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

A solution will be unsaturated if

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Ionic product = Kap

Ionic product < Ksp

Ionic Product > Ksp

both 'a' and 'b' are correct

One dm3 of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH4OH having pKa of 3 has pH.

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4

6

9

10

A solution has pH zero. Its H+ ions concertation will

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zero

More than unity

Less than unity

Unity only

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

The sum of pH and pOH is

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0

7

14

10

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