Which one of the following methods is most suitable for preparing deionized water?

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Heavy water is used for the study of reaction mechanism. Reason (R) : The rate of reaction for the cleavage of O - H bond is slower than that of O - D bond. Choose the most appropriate answer from the options given below :

Deuterium resembles hydrogen in properties but :

The oxide that gives H2O2 most readily on treatment with H2O is :

Given below are two statements : Statement I : The process of producing syn-gas is called gasification of coal. Statement II : The composition of syn-gas is CO + CO2 + H2 (1 : 1 : 1) In the light of the above statements, choose the most appropriate answer from the options given below :

Which one of the following statements is incorrect?

Hydrogen peroxide reacts with iodine in basic medium to give :

In a binary compound, atoms of element A form a hcp structure and those of element M occupy 2/3 of the tetrahedral voids of the hcp structure. The formula of the binary compound is :

A hard substance melts at high temperature and is an insulator in both solid and in molten state. This solid is most likely to be a/an :

Given below are two statements. One is labelled as Assertion A nd the other is labelled as Reason R. Assertion A : Sharp glass edge becomes smooth on heating it upto its melting point. Reason R : The viscosity of glass decreases on melting. Choose the most appropriate answer from the options given below.

The parameters of the unit cell of a substance are a = 2.5, b = 3.0, c = 4.0, $$\alpha$$ = 90$${}^{\circ }$$, $$\beta$$ = 120$${}^{\circ }$$, $$\gamma$$ = 90$${}^{\circ }$$. The crystal system of the substance is :

Select the correct statements (A) Crystalline solids have long range order. (B) Crystalline solids are isotropic (C) Amorphous solid are sometimes called pseudo solids. (D) Amorphous solids soften over a range of temperatures. (E) Amorphous solids have a definite heat of fusion. Choose the most appropriate answer from the options given below.

Given below are two statements. Statement I : Frenkel defects are vacancy as well as interstitial defects. Statement II : Frenkel defect leads to colour in ionic solids due to presence of F-centres. Choose the most appropriate answer for the statements from the options given below :

What is the major product formed by HI on reaction with

The product formed in the first step of the reaction of with excess $$Mg/E{\mathrm{t}}_2\mathrm{O}$$ ($$\mathrm{Et}={\mathrm{C}}_2{\mathrm{H}}_5$$) is

Identify A and B in the chemical reaction.

For the given reaction What is 'A'?

For the given reaction : What is 'A'?

Match List - I with List - II. Choose the correct answer from the options given below :

The products ''A'' and ''B'' formed in above reactions are :