Chemistry Question Bank

Select correct statement:

Boron can be obtained by various methods but not by:

Among the following statements, the incorrect one is:

Carbonate of which of the following metal does not liberate carbon dioxide on heating:

The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is

The two most abundant metals in the earth crust are:

The maximum temperature that can be achieved in blast furnace is: (NEET 2021)

Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature? (NEET 2021)

Identify the correct statement from the following: (NEET 2020)

Which of the following has maximum iron content? (AIIMS 2019)

Identify the incorrect statement. (Odisha NEET 2019)

Which one is malachite from the following? (NEET 2019)

Which of the following pair of ores cannot be converted into corresponding metals by pyrometallurgy?

At infinite dilution, the percentage ionisation  for  both strong and weak electrolytes is

A monoprotic acid in 1.00 M solution is 0.01% ionized. The dissociation constant of this acid is (a) 1 10 x (b) 1 10 x (c) 1 10 x (d) 1 10 x

For a pure water,

The concentration of water molecules in pure water at 298 K is

The  hydrogen  ion  concentration  of  a  10–8  M  HCl  aq. solution at 298K (Kw = 10–14) is (a) 1.0 10 M x (b) 1.10 10 M x (c) 9.525 10 M x (d) 1.0 10 M x

At 90oC, pure water has H3O+ ion concentration of 10-6 mol/L. The Kw at 90oC is

The  concentration  of [H+]  and  concentration of  [OH–] of  a  0.1  aqueous  solution  of  2%  ionised  weak monoprotic acid is [ionic product of water = 1×10–14]

w 2H O H O OH ,K 1 10 x at 25ºC hence Ka is : (a) 1 10 x (b) 5.55 10 x (c) 18 10 x (d) 1.00 10 x

The term pH comes from

A soda water bottle has pH

Which of the following solutions will have the highest pH value ?

Equal volumes of two solutions of hydrochloric acid are mixed. One solution has a pH 1 while the other has a pH 5. The pH of the resulting solution is :