Question # 1

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

The relationship between K_pand K_cis given by

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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 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

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

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

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 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

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

The sum of pH and pOH is

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0

7

14

10

K_aand K_bof a conjugate acid and are related with k_was

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K_a+ K_b=K_w

K_a-K_b=K_w

K_a.K_b= K_w

K_a/ K_b= K_w

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dm⁺⁶mole^-2

mole²dm^-6

Mole dm^-3

Having no units

Kw for water at 0 oc is 0.1 x 10^-34 and at 100 ^oC 7.5 x 10^-14, How many times dissociation of water increase from 0 ^oCto 100 ^oC

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7.5 times

50 times

75 times

100 times

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

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