Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions

Nitric acid forms an oxide of nitrogen on reaction with P₄O₁₀. Write the reaction involved. Also write the resonating structures of the oxide of nitrogen formed.

Give an example to show the effect of concentration of nitric acid on the formation of oxidation product.

Indicate the complex ion which shows geometrical isomerism.

\[\ce{IUPAC}\] name of \[\ce{[Pt(NH3)2 Cl(NO2)]}\] is ______.

Assertion: Complexes of MX₆ and MX₅L type (X and L are unidentate) do not show geometrical isomerism.

Reason: Geometrical isomerism is not shown by complexes of coordination number 6.

How can propan-2-one be converted into tert- butyl alcohol?

Why is the reactivity of all the three classes of alcohols with conc. \[\ce{HCl}\] and \[\ce{ZnCl2}\] (Lucas reagent) different?

Explain a process in which a biocatalyst is used in industrial preparation of a compound known to you.

Amongst the following, the strongest base in aqueous medium is ______.

Benzylamine may be alkylated as shown in the following equation:

\[\ce{C6H5CH2NH2 + R - X -> C6H5CH2NHR}\]

Which of the following alkylhalides is best suited for this reaction through S_N1 mechanism?

Which of the following reagents would not be a good choice for reducing an aryl nitro compound to an amine?

In order to prepare a 1° amine from an alkyl halide with simultaneous addition of one \[\ce{CH2}\] group in the carbon chain, the reagent used as source of nitrogen is ______.

The source of nitrogen in Gabriel synthesis of amines is ______.

Amongst the given set of reactants, the most appropriate for preparing 2° amine is ______.

The best reagent for converting 2–phenylpropanamide into 2-phenylpropanamine is ______.

The best reagent for converting, 2-phenylpropanamide into 1- phenylethanamine is ______.

Hoffmann Bromamide Degradation reaction is shown by ______.

Reduction of aromatic nitro compounds using \[\ce{Fe}\] and \[\ce{HCl}\] gives ______.

Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is ______.

Which of the following compounds is the weakest Brönsted base?