# AIIMS MBBS Entrance Test 2019 Chemistry Paper with Answer & Solutions 26 May Second Shift Part 7

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Q-66: of a salt solution of wak acid & weak base is:

Options:

(1)

(2)

(3)

(4)

Answer: (1)

Solution:

Q-67: Radius of 1^{st} orbit of & some orbit of is same. Energy of their orbit of is:

Options:

(1)

(2)

(3)

(4)

Answer: (1)

Solutions:

n=2

Q-68: Select the correct statement regarding shapes of, &:

Options:

(1) All are square pyramidal

(2) All are trigonal bipyramidal

(3) One of the following is square pyramidal

(4) One of the following is tetrahedral

Answer: (3)

Solution:

Q 69. Which of the following is incorrect about?

Options:

(1) It can be prepared from.

(2) It is used in redox titrations.

(3) It is stable in both acid & base.

(4) It is orange in colour

Answer: (3)

Solution:

Colour of is orange

Is used in redox titrations.

Q-70: The conductivity of a solution of a weak monobasic acid is. If for weak acid is

, calculate Ka of weak monobasic acid:

Options:

(1)

(2)

(3)

(4)

Answer: (1)