List of top Chemistry Questions asked in COMEDK UGET

Which one of the following is an example for heterogeneous catalysis?

With sodium hydroxide, silver nitrate forms a black precipitate of

In the manufacture of ordinary glass the substance used is

Which of the following reagents can be used to distinguish between phenol and benzyl alcohol ?

Stainless steel is an alloy of

Acetophenone when nitrated, the major product obtained is

Power alcohol is

Smoke is an example of

The minimum energy required to excite $H_2$ atom from its ground state is

Tranquilisers

Which of the following gives a white precipitate with alcoholic silver nitrate?

The salt soluble in excess of sodium hydroxide solution is

Concentrated nitric acid with aluminium gives

The temperature coefficient of a reaction is 2. If the velocity of the reaction is 5 at 25�C, then, the velocity of the reaction at 55�C is

The amount of calcium carbonate that reacts with 500 cc of 0.5 N hydrochloric acid is

Liquation process is used for the purification of

Borax is

The first excited state of hydrogen atom is 10.2 eV above its ground state. The temperature needed to excite hydrogen atoms to first excited level, is :

The energy of electron in the nth orbit of hydrogen atom is expressed as $ \sqrt{3}cm $ . The shortest and longest wavelength of Lyman series will be :