AIPMT 2012 Prelims | Thermodynamics Question 33 | Chemistry

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

In which of the following reactions, standard reaction entropy change ($$\Delta $$S^o) is positive and standard Gibb's energy change ($$\Delta $$G^o) decreases sharply with increasing temperature ?

C_(graphite) + $${1 \over 2}$$O_2(g) $$ \to $$ CO_(g)

CO_(g) + $${1 \over 2}$$O_2(g) $$ \to $$ CO_2(g)

Mg_(s) + $${1 \over 2}$$O_2(g) $$ \to $$ MgO_(g)

$${1 \over 2}$$C_(graphite) + $${1 \over 2}$$O_2(g) $$ \to $$ $${1 \over 2}$$CO_2(g)

AIPMT 2011 Mains

MCQ (Single Correct Answer)

-1

Consider the following processes :

	H (kJ/mol)
1/2A $$ \to $$ B	+150
3B $$ \to $$ 2C + D	-125
E + A $$ \to $$ 2D	+350

For B + D $$ \to $$ E + 2C, $$\Delta $$H will be

525 kJ/mol

$$-$$175 kJ/mol

$$-$$ 325 kJ/mol

325 kJ/mol

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

Which of the following is correct option for free expansion of an ideal gas under adiabatic condition ?

q = 0, $$\Delta $$T $$ \ne $$ 0, w = 0

q $$ \ne $$ 0, $$\Delta $$T = 0, w = 0

q = 0, $$\Delta $$T = 0, w = 0

q = 0, $$\Delta $$T < 0, w $$ \ne $$ 0

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

Enthalpy change for the reaction,
4H_(g) $$ \to $$ 2H_2(g) is $$-$$869.6 kJ
The dissociation energy of H $$-$$ H bond is

434.8 kJ

$$-$$ 869.6 kJ

+ 434.8 kJ

+ 217.4 kJ

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