AIPMT 2012 Prelims | Equilibrium Question 45 | Chemistry

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Equimolar solutions of the following substances were prepared separately. Which one of these will record the highest pH value ?

BaCl₂

AlCl₃

LiCl

BeCl₂

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

Buffer solutions have constant acidity and alkalinity because

these give unionised acid or base on reaction with added acid or alkali

acids and alkalies in these solutions are shielded from attack by other ions

they have large excess of H⁺ or OH^$$-$$ ions

they have fixed value of pH

AIPMT 2011 Mains

MCQ (Single Correct Answer)

-1

In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag⁺ and pb²⁺ at a concentration of 0.10 M. Aqueous HCl is added to this solution until the Cl^$$-$$ concentration is 0.10 M. What will the concentrations of Ag⁺ and Pb²⁺ be at equilibrium ?

(K_sp for AgCl = 1.8 $$ \times $$ 10^$$-$$10, K_sp for PbCl₂ = 1.7 $$ \times $$ 10^$$-$$5)

[Ag⁺] = 1.8 $$ \times $$ 10^$$-$$7 M, [Pb²⁺] = 1.7 $$ \times $$ 10^$$-$$6 M

[Ag⁺] = 1.8 $$ \times $$ 10^$$-$$11 M, [Pb²⁺] = 8.5 $$ \times $$ 10^$$-$$5 M

[Ag⁺] = 1.8 $$ \times $$ 10^$$-$$9 M, [Pb²⁺] = 1.7 $$ \times $$ 10^$$-$$3 M

[Ag⁺] = 1.8 $$ \times $$ 10^$$-$$11 M, [Pb²⁺] = 1.7 $$ \times $$ 10^$$-$$4 M

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

The value of $$\Delta $$H for the reaction
X_2(g) + 4Y_2(g) $$\rightleftharpoons$$ 2XY_4(g)
is less than zero. Formation of XY_4(g) will be favoured at

high temperature and high pressure

low pressure and low temperature

high temperature and low pressure

high pressure and low temperature

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