Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to :

The highest industrial consumption of molecular hydrogen is to produce compounds of element :

The reaction of $${\mathrm{H}}_2{\mathrm{O}}_2$$ with potassium permanganate in acidic medium leads to the formation of mainly :

High purity (> 99.95%) dihydrogen is obtained by :

Which of the following can be used to prevent the decomposition of $${\mathrm{H}}_2{\mathrm{O}}_2$$ ?

The products obtained from a reaction of hydrogen peroxide and acidified potassium permanganate are :

Given below are two statements. Statement I : Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions. Statement II : Density of hydrogen peroxide at $$298\mathrm{K}$$ is lower than that of $${\mathrm{D}}_2\mathrm{O}$$. In the light of the above statements, choose the correct answer from the options given below.

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

The products obtained during treatment of hard water using Clark's method are :

The incorrect statement about the imperfections in solids is :

An element X has a body centred cubic (bcc) structure with a cell edge of 200 pm. The density of the element is 5 g cm$$-$$3. The number of atoms present in 300 g of the element X is _______________. Given : Avogadro constant, NA = 6.0 $$\times$$ 1023 mol$$-$$1.

In the given conversion the compound A is :

The stable carbocation formed in the above reaction is

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

In the above reaction 'A' is

The major product (P) in the reaction is

Which one of the following compounds is inactive towards SN1 reaction?

The major product of the following reaction is :

Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product?

The major product in the reaction