Ncert Solutions Chemistry Class 12th

Which of the following is not a broad spectrum antibiotic?

Which of the following is an example of polyester?

The major product of the above reactions is:

Which of the following is an example of conjugated diketone?

Two statement are given below:

Statement I : The melting point of monocarboxylic acid even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series.

Statement II :  The solubility of monocarboxylic acids in water decreases with increases in molar mass.

Choose the most appropriate options

In the given reaction sequence, the major product 'C' is : :           

$C_8{H}_{10}\underset{H_{2}S{O}_4}{\overset{HN{O}_3}{\to }}A\underset{\Delta }{\overset{B{r}_2}{\to }}B\underset{KOH}{\overset{alcoholic}{\to }}C$

Given below are two statements :                                                       

Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on standing.

Statement II : For stabilization of an emulsion, excess of electrolyte is added. In the light of the above statements, choose the most appropriate answer from the options given below :

0.01 M KMnO₄ solution was added to 20.0mL of 0.05 M Mohr's salt through a burette. The initial reading of 50mL burette is zero. The volume of KMnO₄ solution left in the burette after the end point is__________ mL. (nearest integer)

The complete combustion of 0.492g of an organic compound containing 'C', 'H' and 'O' given 0.793g of CO₂ and 0.442g H₂O. The percentage of oxygen composition in the organic compound is __________. (nearest integer)