Question # 1

The sum of pH and pOH is

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0

7

14

10

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

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

A chemical reaction A ---------- B is said to be in equilibrium when

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Complete conversion of A to B has taken place

Conversion of A to B is 50% complete

Rate of transformation of A to B is equal to B to A

50% Reactant have been changed to B

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dm⁺⁶mole^-2

mole²dm^-6

Mole dm^-3

Having no units

The solubility product of AgCI is 2.0 x 10^-10mol²dm^-6The maximum concentration of Ag⁺ions in the solution is

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2.0 x 10^-10mol dm^-3

1.41 x 10^-5mol dm^-3

1.0 x 10^-10mol dm^-3

4.0 x 10^-20mol dm^-3

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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 pH of human blood is

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7.0

7.4

4.0

6.5

The number of moles of acid or base required by one dm³of buffer to alter its pH by one unit is called

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Buffer efficiency

Buffer capacity

Buffer action

None

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

When small amount of acid or base is added to buffer, its pH.

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Remain same

Always increases

Always decreases

slightly increases or decreases

Which one of the following has highest pH

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Distilled water

1 M NH4OH

1 M NaOH

Water saturated with chlorine gas

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

_________ was derived by C.M Guldberg and P Waage in 1864

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Law of conservation of Mass

Law of mass action

Law of conservation of energy

Distribution law

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

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

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

At equilibrium stage of chemical reaction

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The concentration of reaction is equal to concentration of products

The rate constant of forward reaction is equal to rate constant of backward reaction

The rate of forward reaction is equal rate of backward reaction

The energy of activation of forward step is equal to energy of activation of backward step

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