WB JEE 2020 | Chemical Bonding Question 8 | Chemistry

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WB JEE 2020

MCQ (Single Correct Answer)

-0.25

Bond order of He₂, $$He_2^ + $$ and $$He_2^{2 + }$$ are respectively

1, $${1 \over 2}$$, 0

0, $${1 \over 2}$$, 1

$${1 \over 2}$$, 1, 0

1, 0, $${1 \over 2}$$

WB JEE 2020

MCQ (Single Correct Answer)

-0.5

A homonuclear diatomic gas molecule shows 2-electron magnetic moment. The one-electron and two-electron reduced species obtained from above gas molecule can act as both oxidising and reducing agents. When the gas molecule is one-electron oxidised the bond length decreases compared to the neutral molecule. The gas molecule is

N₂

Cl₂

O₂

B₂

WB JEE 2019

MCQ (Single Correct Answer)

-0.33

The indicated atom is not a nucleophilic site in

$$\mathop B\limits_ \uparrow H_4^ - $$

$$\mathop C\limits_ \uparrow {H_3}Mgl$$

$$C{H_3}\mathop O\limits_ \uparrow H$$

$$C{H_3}\mathop N\limits_ \uparrow {H_2}$$

WB JEE 2019

MCQ (Single Correct Answer)

-0.33

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

Less

Same

Cannot be predicted

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