Chemistry Question Bank

In which of the following properties hydrogen does not show similarity with alkali metals?

In what respect electronic configuration of hydrogen and halogens are similar?

Hydrogen is prepared by the reaction of

Zn 2NaOH aq X H -> What is (X) in the above reaction?

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 …

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

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

…….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

NaH s H O NaOH aq H g -> and 8LiH Al Cl 2LiAlH 6LiCl -> In the above reaction, NaH and LiH are the examples of

CH ,NH ,H O and HF are the example of

Earlier, it was thought that in the non-stoichiometric hydrides, hydrogen occupies interstices in the metal lattice producing distortion without any change in its type. Consequently, they were termed as ………X…….. Here,…

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

Ionic hydrides react with water to give

Metallic hydrides are

Which of the following metals directly combine with hydrogen gas to give a hydride?

Hydrolysis of SiCl4 gives

The maximum number of hydrogen bonds formed by a water molecule in ice is

How many hydrogen bonded water molecules are associated with CuSO4.5H2O?

In which of the following reactions H2O acts as a bronsted acid? (a) 3 aq aq 4 aq H O NH OH NH l (b) aq aq aq H O H S H O HS l (c) aq aq H O H O H O OH l l (d) aq aq H OH H O ( ) ( ) l

Water plays a key role in the biosphere. It is due to certain properties of H2O as compared to other liquids. Which of these is not a correct property of water?

Which is not a property of water ?

Liquid water is denser than ice due to

Which gas is produced when calcium nitride (Ca3N2) is hydrolysed by water?