Chemistry Question Bank

…….X….. are crystalline, non-volatile and non- conducting in solid state. (X) Melts conduct electricity and on electrolysis liberate dihydrogen gas at anode. Here, X refers to

Alkenes combine with carbon monoxide and hydrogen in presence of octacarbonyldicobalt as catalyst under high temperature and pressure to form

Which property of hydrogen is shown by the following reactions ? (i) Fe3O4 + 4H2 -> 3Fe + 4H2O (ii) CO + H2 -> O ZnO Cr CH3OH

Metal hydrides may be ionic, covalent or molecular in nature. Among LiH,NaH,KH,RbH,CsH the correct order of increasing ionic character is

Dihydrogen, under certain reaction condition, combines with almost all elements except noble gases to form binary compounds. The binary compounds are called

Which of the following statements is correct regarding hydrogen?

Which of the following reactions of hydrogen with non- metals represents Haber‟s process ? (a) heat 2H O 2H O; H 285.9kJmol -> (b) 673K,Fe 200atm 3H N 2NH ; H 92.6kJmol -> (c) hv H Cl 2HCl -> (d) 1100 C 2H C C…

Which of the following groups of ions makes the water hard? (AIPMT 1994)

The order of reactivity of halogens towards hydrogen is

On burning hydrogen in air, the colour of flame is

On reaction with water, which of the following does not produce any hydride? (a) CaH (b) Be C (c) Mg N (d) Ca P

Which one of the following statements about water is FALSE?

If a mole of hydrogen molecule is heated to a high temperature, then which of the following reaction take place ? (a) 2 g g g H 436kJmol H H -> (b) 2 g 2 g 2H 820kJmol 2H -> (c) 2 g 2 g g g H H 436kJmol …

Name the gas, which is colourless, odourless, tasteless, combustible, lighter than air and insoluble in water.

The chemical reactions of dihydrogen are accomplished by

Hydrogenation of vegetable oils using nickel as a catalyst gives edible fats which is/are known as

Why does H+ ion always get associated with other atoms or molecules?

In context with the industrial preparation of hydrogen from water gas (CO + H2), which of the following is the correct statement?

Which of the following statement is correct regarding properties of hydrogen?

Which of the following gas in insoluble in water?

Hydrogen does not possess the metallic characteristics under normal conditions because

Which of the following metals does not liberate hydrogen from acids?

Which of the following metals will react with NaOH and KOH to liberate hydrogen gas?

The process of production of syngas coal is quite common these days. The production of syngas from coal is called

Pure nascent hydrogen is best obtained by