# AIIMS MBBS Entrance Test 2019 Chemistry Paper with Answer & Solutions 26 May First Shift Part 5

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Q-70:

Find the standard enthalpy of formation of

(1)

(2)

(3)

(4)

Answer: (2)

Solution:

Formation of:

Q-71: If boiling point of water is. How much gram of is added in of water to increase its boiling point of water by approx.

Options:

(1)

(2)

(3)

(4)

Answer: (2)

Solution:

Q-72: In isolated system, find the condition for spontaneous reaction:

Options:

(1)

(2)

(3)

(4)

Answer: (3)

Q-73: A bulb is emitted electromagnetic radiation of wave length. The Total energy of radiation is the number of emitted photon will be:

Options:

(1)

(2)

(3)

(4)

Answer: (2)

Solution:

Number of photons

Q-74: At temperature, A hydrogen gas electrode is made by dipping platinum wire in a solution of of and by passing hydrogen gas around the platinum were at one pressure. The potential of electrode would be?

Options:

(1)

(2)

(3)

(4)

Answer: (1)

Solution:

Q-75: The decomposition of on Pt surface is a zero order reaction. If the value of rate constant is mole The rate of appearance of and are respectively:

Options:

N2 H2

(1)

(2)

(3)

(4)

Answer: (3)