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Class 12th

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3 months ago

Class 12th Chemistry

Statement-I : Aniline on reaction with concentrated H2SO4 at 475 K gives p-amino benzene sulphonic acid. This gives blood red colour with Lassaigne's test.

Statement-II : Aniline forms a salt with anhydrous AlCl3 in Friedel Craft's reaction.
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A
alok kumar singh

Contributor-Level 10

p-amino benzene sulphonic acid contains both N and S, so it gives blood red colour with Lassaigne's test.

New answer posted

3 months ago

Class 12th Chemistry

What will be the reactivity order of following compounds towards electrophilic substitution reaction?
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A
alok kumar singh

Contributor-Level 10

Kindly go through the images

 

New answer posted

3 months ago

Class 12th Chemistry

Consider the following reaction

A and B respectively are

 

 
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A
alok kumar singh

Contributor-Level 10

Kindly go through the solution

 

New answer posted

3 months ago

Class 12th Chemistry

Choose the correct answers.

(A) Mn2O7 is a oil at room temperature.

(B) V2O4 react with acid to give VO2+

(C) CrO is a basic oxide

(D) V2O5 does not react with acids.
0 Follower 6 Views

A
alok kumar singh

Contributor-Level 10

A, B and C are correct.

Mn2O7 is a green oil at room temperature.

V2O4 react with acids to give VO2+.

CrO is Basic and CrO3 is acidic.

V2O5 react with acids as well as alkali.

New answer posted

3 months ago

Class 12th Chemistry

Identify the given reaction

 
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A
alok kumar singh

Contributor-Level 10

The given reaction is Gattemann Koch reaction.

New answer posted

3 months ago

Class 12th Chemistry

What is the major product formed in the following reaction?

 
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A
alok kumar singh

Contributor-Level 10

Kindly go through the image

 

New answer posted

3 months ago

Class 12th Chemistry

What is the product formed in the below given reaction?

 
0 Follower 2 Views

A
alok kumar singh

Contributor-Level 10

Kindly go through the image

 

New answer posted

3 months ago

Class 12th Chemistry Coordination Compounds

Match the following :

(a) [Cr(H2O)6]+3             (i)  

(b) [Fe(H2O)6]+3             (ii)

(c) [Ni(H2O)6]+2             (iii)

(d) [V(H2O)6]+3              (iv)

0 Follower 7 Views

A
alok kumar singh

Contributor-Level 10

(a) [Cr (H2O)6]+3 → Cr+3 → t 2 g 3 e g °  

(b) [Fe (H2O)6]+3 → Fe3+ → t 2 g 3 e g 2  

(c) [Ni (H2O)6]+2 → Ni2+ → t 2 g 6 e g 2  

(d) [V (H2O)6]+3 → V3+ → t 2 g 2 e g °  

New answer posted

3 months ago

Class 12th Chemistry

Statement-I : Among 15th group hydrides reducing character decreases from NH3 to BiH3.

Statement-II : E2O3 and E2O5 are always basic.

[Where E is group 15 element]
0 Follower 2 Views

A
alok kumar singh

Contributor-Level 10

Reducing character increases from NH3 to BiH3.

Group 15 oxides of type E2O3 and E2O5 are not always basic.

New answer posted

3 months ago

Class 12th Chemistry Coordination Compounds

Which of the following is correct?
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A
alok kumar singh

Contributor-Level 10

Ni2+ : 4s03d8 (No pairing with Cl–)

[Ni (CO)4] : 4s03d10 (diamagnetic)

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