Ncert Solutions Chemistry Class 12th
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New answer posted
5 months agoContributor-Level 10
(i) The compound contains ether group and an aldehydic functional group with the longest chain having 3 carbon atoms. α means the position of the carbon atom attached to attached to the carbon atom of the functional group, in this case, it is an aldehyde functional group.
(ii) The compound contains an alcoholic group and an aldehydic functional group with the longest chain having 4 carbon The numbering of the chain starts from a carbon atom of aldehyde group.
(iii) The compound contains an alcoholic group and an aldehydic functional group, with the longest chain having 5 carbon atoms, which are cyclic in The numbering of the chain st
New answer posted
5 months agoContributor-Level 10
(i) The compound contains ether group and an aldehydic functional group with the longest chain having 3 carbon atoms. α means the position of the carbon atom attached to attached to the carbon atom of the functional group, in this case, it is an aldehyde functional group.
(ii) The compound contains an alcoholic group and an aldehydic functional group with the longest chain having 4 carbon The numbering of the chain starts from a carbon atom of aldehyde group.
(iii) The compound contains an alcoholic group and an aldehydic functional group, with the longest chain having 5 carbon atoms, which are cyclic in The numbering of the chain st
New answer posted
5 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Ans: Detergents with low CMC are more economical to use as they involve formation of micelle which is used for cleaning of oil and dirt from our cloth. Micelle formation takes place when the concentration of the detergent becomes equal to the CMC so the answer is (i).
New answer posted
5 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Ans: Greater the valence of the flocculating ion added, the greater is its power to cause precipitation. This is known as Hardy schulze rule. In the coagulation of a negative sol, the flocculating
New answer posted
5 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Ans: Colloidal particle shows Brownian movement. The Brownian movement has a stirring effect which does not permit the particles to settle and thus, is responsible for the stability of sols so the answer is (v).
New answer posted
5 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Ans: Colloidal particles being bigger aggregates, the number of particles in a colloidal solution is comparatively small as compared to a true solution. Hence, the values of colligative properties (osmotic pressure, lowering in vapour pressure, depression in freezing point and elevation in boiling point) are of small order as compared to values shown by true solutions at same concentration hence the answer is (i).
New answer posted
5 months agoContributor-Level 10
This is a Assertion and Reason Type Questions as classified in NCERT Exemplar
Ans: Colloidal particles can pass through ordinary filter paper because the pores are too large. However, the pores of filter paper can be reduced in size by impregnating with collodion solution to stop the flow of colloidal particles hence the answer is (iii).
New answer posted
5 months agoContributor-Level 10
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: The answers are: (i)- (d) (ii)- (c) (iii)- (a) (iv)- (b)
Dispersed Phase | Dispersion medium | Example colloid solution |
Solid | Liquid | Butter |
Gas | Solid | Pumice stone |
Liquid | Liquid | Milk |
Solid | Liquid | Paint |
New answer posted
5 months agoContributor-Level 10
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: (i)- (d); (ii)- (c); (iii)- (a); (iv)- (b)
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