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4 months ago

Environmental chemistry Class 11th

The metal salts formed during softening of hardwater using Clark's method are:
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V
Vishal Baghel

Contributor-Level 10

In clark's method Ca (OH)2 is used for softening hard water.

C a ( H C O 3 ) 2 + C a ( O H ) 2 → 2 C a C O 3 + 2 H 2 O

M g ( H C O 3 ) 2 + 2 C a ( O H ) 2 → 2 C a C O 3 + M g ( O H ) 2 2 H 2 O    

Thus CaCO3 and Mg (OH)2 are formed in reaction.

New answer posted

4 months ago

Environmental chemistry Class 11th

Phenol on reaction with dilute nitric acid, gives two products. Which method will be most efficient for large scale separation?
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Payal Gupta

Contributor-Level 10

Ortho product has intramolecular H- bonding & para product has intermolecular H- bonding. Thus it can be separated by steam distillation due to difference in B.

New answer posted

4 months ago

Environmental chemistry Class 11th

The eutrophication of water body results in
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Payal Gupta

Contributor-Level 10

Eutrophication of water body results in loss of biodiversity.

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4 months ago

Environmental chemistry Class 11th

Some gases are responsible for heating of atmosphere (green house effect). Identify from following the gaseous species which does not cause it.
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alok kumar singh

Contributor-Level 10

CH4, O3 & H2O are green-house gases.

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4 months ago

Environmental chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

The acid that is believed to be mainly responsible for the damage of Taj Mahal is
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alok kumar singh

Contributor-Level 10

CaCO3 + H2SO4 → CaSO4 + CO2 + H2O

New answer posted

4 months ago

Environmental chemistry Chemistry NCERT Exemplar Solutions Class 12th Chapter Fourteen

Match List I with List II.

Choose the correct answer from the option given below:
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alok kumar singh

Contributor-Level 10

              Match list-I with list-II

List-I

Pollutant

List-II

Source

(a)

Microorganisms

(i)

Domestic sewage

(b)

Plant nutrients

(ii)

Chemical fertilizer

(c)

Toxic heavy metals

(iii)

Chemical factory

(d)

Sediment

(iv)

Strip mining

 

New answer posted

4 months ago

Environmental chemistry Class 11th

14.3. Ozone depletion is mainly due to
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Vishal Baghel

Contributor-Level 10

Kindly go through the solution

CFCs

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4 months ago

Environmental chemistry Class 11th

14.2. BOD is a measure of
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Vishal Baghel

Contributor-Level 10

Organic pollutants in water

 

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4 months ago

Environmental chemistry Class 11th

14.1. Which acid is most abundant in acid rain?
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Vishal Baghel

Contributor-Level 10

Kindly go through the solution

H2SO4 

New answer posted

4 months ago

Environmental chemistry Class 11th

14.5 Assertion: It is important to maintain the ozone shield ozone (O3).

Reason: O3 protects us from the harmful ultraviolet (UV) radiations coming from the sun.
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V
Vishal Baghel

Contributor-Level 10

Kindly go through the solution

(a)

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