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Ncert Solutions Chemistry Class 12th

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New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

The structure is a repeating unit for

 
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R
Raj Pandey

Contributor-Level 9

Novolac is a linear polymer obtained from phenol and formaldehyde by condensation reaction.
[Structure of Novolac polymer]

 

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

The oxidation states of 'P' in H?P?O?, H?P?O? and H?P?O?, respectively are:
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V
Vishal Baghel

Contributor-Level 10

Compound Oxidation state of P
H? P? O? → 5
H? P? O? → 3
H? P? O? → 4

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with NaOH is:
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R
Raj Pandey

Contributor-Level 9

Bauxite contains SiO?, TiO? & Fe?O? as impurities. SiO? being acidic is leached with NaOH as Na?SiO?.
Al?O? + 2NaOH → 2NaAlO? + H?O
SiO? + 2NaOH → Na?SiO? + H?O

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

The parameters of the unit cell of substance are a = 2.5, b= 3.0, c=4.0, α = 90°, β =120°, γ = 90°. The crystal system of the substance is:
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V
Vishal Baghel

Contributor-Level 10

In Monoclinic crystal system, a ≠ b ≠ c and α = 90°, γ = 90° and β=120°.

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

Consider the above reaction, the major product 'P' is:

 

 

 
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R
Raj Pandey

Contributor-Level 9

[Reaction of an α, β-unsaturated ketone with ethyl magnesium bromide (Grignard reagent) followed by hydrolysis to give a tertiary alcohol via 1,2-addition.]

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

Match List- I with List-II:
0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

(a) Furacin → Antiseptic
(b) Arsphenamine → Antibiotic
(c) Dimetone → Synthetic antihistamines
(d) Valium → Tranquilizers

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

Consider the above reaction and identify the product P:
0 Follower 21 Views

V
Vishal Baghel

Contributor-Level 10

Kindly consider the following figure

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

A reaction of benzonitrile with one equivalent CH?MgBr followed by hydrolysis produces a yellow liquid "P". The compound "P" will give positive
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A
alok kumar singh

Contributor-Level 10

P will give positive iodoform test.

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

Which one of the following compounds will give orange precipitate when treated with 2,4-Dinitrophenyl hydrazine?
0 Follower 15 Views

V
Vishal Baghel

Contributor-Level 10

All carbonyl compound (aldehyde and ketone) give orange precipitate with 2,4-dinitrophenyl hydrazine (Brady's reagent)

New answer posted

7 months ago

Ncert Solutions Chemistry Class 12th Class 12th

What is the major product "P" of the following reaction?

 
0 Follower 5 Views

A
alok kumar singh

Contributor-Level 10

Kindly go through the solution

 

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