Ncert Solutions Chemistry Class 12th

Which one of the following techniques is not used to spot components of a mixture separated in thin layer chromatographic plate?

Which amongst the following is not a pesticide?

Which one of the lanthanoids given below is the most stable in divalent form?

The mixture of chloroxylenol and terpineol is an example of

Given are two statements one is labeled as Assertion A and other is labeled as Reason R.

 Assertion A : Magnesium can reduce Al₂O₃ at a temperature below 1350°C, while above 1350°C aluminium can reduce MgO

Reason R : The melting and boiling points of magnesium are lower thatn those of aluminium.

In light of the above statements, choose most appropriate answer for the options given below:

The Zeta potential is related to which property of colloids?

The incorrect statement about the imperfections in solids is:

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Dacron is an example of polyester polymer.

Reason R : Dacron is made up of ethylene glycol and terephthalic acid monomers.

In the light of the above statements, choose the most appropriate answer from the options given below.

In Friedel-Crafts alkylation of aniline, one gets

Two isomers (A) and (B) with molar mass 184 g/mol and elemental composition C, 52.2%; H. 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid respectively on oxidation with KMnO₄. Isomer 'A' is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO₃. Isomer 'A' and 'B' are respectively