AIIMS MBBS Entrance Test 2019 Chemistry Paper with Answer & Solutions 26 May First Shift Part 4

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Q-55: is

(1) Ferromagnetic

(2) Antiferromagnetic

(3) Ferromagnetic

(4) Diamagnetic

Answer: (2)

Q-56:

Assertion: Pure is obtained from but not from

Reason: On decomposition gives gas.

Answer: (3)

Solution:

Q-57: Which have melting point below

Options:

(1

(2)

(3)

(4)

Answer: (2)

Solution:

Has very low m.p. due to low heat of atomization and weak metallic bond.

Q-58: Strong oxidizing agent used in purification of water

(1)

(2)

(3)

(4)

Answer: (1)

Solution:

is a good oxidizing agent and used to purify water

Q-59: Which give coloured carbonate precipitate?

(1)

(2)

(3)

(4)

Answer: (3)

Solution:

Carbonate of is pale yellow coloured, other carbonates of , are colourless

Q-60: Yellow colour of chlorine water fades because of

(1) Form

(2) Chlorine gas escapes

(3)

(4)

Answer: (1)

Solution:

;

(Nascent oxygen responsible for bleaching action)

Q-61: Which has least covalent radius.

(1)

(2)

(3)

(4)

Answer: (4)

Solution:

Covalent radius in pm

Q-62: Which is least soluble?

Options:

(1)

(2)

(3)

(4)

Answer: (2)

Solution:

is more covalent so it is least soluble

Q-63: Which of the following reacts most slowly with nitric acid?

Options

(1) Phosphorus

(2) Chlorine

(3) Sulphur

(4) Iodine

Answer: (2)

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