Chemical Reacti...

Which of the following is a chemical change?

What will happen if temperature of 1 kg of water is raised from 30^o to 140^oC?

I. There will be a change in the physical state of the substance.
II. It goes through a chemical change.
III. All the heat supplied does not contribute to the temperature rise.
IV. The boiling point of water will depend on the atmospheric pressure.

Chemical change does not take place in case of

Which of the following represents a chemical change?

Which of the following processes causes a chemical change?

What is generally affected in a chemical change?

Which of the following is a reduction reaction?

In the ordinary fire extinguisher, carbon dioxide is generated by the reaction of

When a small amount of manganese dioxide is added to hydrogen peroxide, oxygen is evolved. This is an example of

Which of the following is an example of photolysis reaction?

Which of the following reactions involves neutralization as well as precipitation?

Balancing of chemical equation is done for compliance with

Consider the following partial ionic reaction:
S₂ + 32H₂O 8SO₄^- + 64H⁺ + 48e^-
The equivalent weight of sulphur is

In the given ionic reactions, which one of the ions is getting oxidized?

Cu²⁺(aq) + 2e^- Cu(s)
2Cl^-(aq) Cl₂(g)+ 2e^-

Which one of the following electrolytes contains the largest number of ions?

Which of the following is the best reducing agent?

Which of the following is not a redox reaction?

In the reaction: Zn + H₂SO₄ ZnSO₄ + H₂, zinc undergoes

The oxidation number of sulphur in SO₄^2– is

In the formula of aluminium sulphate, what does the subscript '3' indicate?