JEE Main 2021 (Online) 20th July Morning Shift | JEE Main Year Wise Previous Years Questions

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MCQ (Single Correct Answer)

-1

According to the valence bond theory the hybridization of central metal atom is dsp² for which one of the following compounds?

$$NiC{l_2}.6{H_2}O$$

$${K_2}[Ni{(CN)_4}]$$

$$[Ni{(CO)_4}]$$

$$N{a_2}[NiC{l_4}]$$

JEE Main 2021 (Online) 20th July Morning Shift

MCQ (Single Correct Answer)

-1

The correct structure of Rhumann's Purple, the compound formed in the reaction of ninhydrin with proteins is :

JEE Main 2021 (Online) 20th July Morning Shift Chemistry - Compounds Containing Nitrogen Question 139 English Option 1

JEE Main 2021 (Online) 20th July Morning Shift Chemistry - Compounds Containing Nitrogen Question 139 English Option 2

JEE Main 2021 (Online) 20th July Morning Shift

MCQ (Single Correct Answer)

-1

The correct order of intensity of colors of the compounds is :

$${[Ni{(CN)_4}]^{2 - }} > {[NiC{l_4}]^{2 - }} > {[Ni{({H_2}O)_6}]^{2 + }}$$

$${[Ni{({H_2}O)_6}]^{2 + }} > {[NiC{l_4}]^{2 - }} > {[Ni{(CN)_4}]^{2 - }}$$

$${[NiC{l_4}]^{2 - }} > {[Ni{({H_2}O)_6}]^{2 + }} > {[Ni{(CN)_4}]^{2 - }}$$

$${[NiC{l_4}]^{2 - }} > {[Ni{(CN)_4}]^{2 - }} > {[Ni{({H_2}O)_6}]^{2 + }}$$

JEE Main 2021 (Online) 20th July Morning Shift

MCQ (Single Correct Answer)

-1

The species given below that does NOT show disproportionation reaction is :

$$BrO_4^ - $$

$$Br{O^ - }$$

$$BrO_2^ - $$

$$BrO_3^ - $$

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