1
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
The indicated atom is not a nucleophilic site in
A
$$\mathop B\limits_ \uparrow H_4^ - $$
B
$$\mathop C\limits_ \uparrow {H_3}Mgl$$
C
$$C{H_3}\mathop O\limits_ \uparrow H$$
D
$$C{H_3}\mathop N\limits_ \uparrow {H_2}$$
2
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
The H - N - H angle in ammonia is 107.6$$^\circ$$ while the H - P - H angle in phosphine is 93.5$$^\circ$$. Relative to phosphine, the p-character of the lone-pair on ammonia is expected to be
A
Less
B
More
C
Same
D
Cannot be predicted
3
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Which of the following has the strongest H-bond?
A
O$$-$$H ... S
B
S$$-$$H ... O
C
F$$-$$H ... F
D
F$$-$$H ... O
4
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The shape of $$XeF_5^ - $$ will be
A
square pyramid
B
trigonal bipyramidal
C
planar
D
pentagonal bipyramid
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