1
MCQ (Single Correct Answer)

NEET 2016 Phase 1

Which is the correct statement for the given acids?
A
Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid.
B
Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid.
C
Both are diprotic acids.
D
Both are triprotic acids.

Explanation

2
MCQ (Single Correct Answer)

NEET 2016 Phase 1

Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option

Column $${\rm I}$$ Column $${\rm I}$$$${\rm I}$$
(A) XeF6 (i) distorted octahedral
(B) XeO3 (ii) square planar
(C) XeOF4 (iii) pyramidal
(D) XeF4 (iv) square pyramidal
A
(A) $$ \to $$ (iv);  (B) $$ \to $$ (iii);  (C) $$ \to $$ (i);  (D) $$ \to $$ (ii)
B
(A) $$ \to $$ (iv);  (B) $$ \to $$ (i);  (C) $$ \to $$ (ii);  (D) $$ \to $$ (iii)
C
(A) $$ \to $$ (i);  (B) $$ \to $$ (iii);  (C) $$ \to $$ (iv);  (D) $$ \to $$ (ii)
D
(A) $$ \to $$ (i);  (B) $$ \to $$ (ii);  (C) $$ \to $$ (iv);  (D) $$ \to $$ (iii)

Explanation

3
MCQ (Single Correct Answer)

NEET 2016 Phase 2

AlF3 is soluble in HF only in presence of KF. It is due to the formation of
A
K3[AlF3H3]
B
K3[AlF6]
C
AlH3
D
K[AlF3H]

Explanation

AlF3 is insoluble in anhydrous HF because the F ions are not available in hydrogen bonded HF but, it becomes soluble in presence of little amount of KF due to formation of complex, K3[AIF6].

AIF3 + 3KF $$ \to $$ K3[AIF6].
4
MCQ (Single Correct Answer)

NEET 2016 Phase 2

Boric acid is an acid because its molecule
A
contains replaceable H+ ion
B
gives up a proton
C
accepts OH$$-$$ from water releasing proton
D
combines with proton from water molecule.

Explanation

Boric acid behaves as a Lewis acid, by accepting a pair of electrons from OH ion of water thereby releasing a proton.

H-OH+B(OH)3 $$ \to $$ [B(OH)4] + H+

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