In which of the following, NH₃ is not used?

The molarity of given orthophosphoric acid solution is 2M. Its normality is _______.

The correct order of the thermal stability of hydrogen halide is_______.

On oxidation with iodine, sulphite ion is transformed to _______.

When copper is heated with conc HNO₃ it produces ________.

Which of the following is correct?
a) In PF₅ axial and equatorial bonds are interchanged known as pseudo rotation
b) In solid state PF₅ remains covalent
c) PH₅ cannot be obtained - because H is not sufficiently electronegative to make the d-orbitals contact sufficiently
d) All the above

About" Ammonia"
I. Ammonia is formed by the hydrolysis of urea.
II. It is heavier than air.
III. It can readily liquefied by at about atmospheric pressure.
IV. Liquid ammonia resembles water in its physical properties.
a) I, III and IV only
b) II, I, III and IV
c) II, I, IV and III
d) I, II, III and IV

I. Nitric acid is used in the preparation of aquaregia.
II. Salts of nitric acid are used in photography.
III. About 50% of earth atmosphere contains dinitrogen gas.
IV. CO₂ is the principle gas of atmosphere.
a) I and II only
b) III and IV only
c) III, II, IV and I
d) I, II, III and IV

What is inert pair effect?

Explain why fluorine always exhibit an oxidation state of -1?

What are interhalogen compounds? Give examples.

Give the uses of helium.

Give two uses of nitric acid.

Give the balanced equation for the reaction between chlorine with cold NaOH and hot NaOH.

Give the uses of sulphuric acid.

Write the reason for the anomalous behaviour of Nitrogen.

Give the uses of argon.

Give two equations to illustrate the chemical behaviour of phosphine.

What happens when PCl₅ is heated?

What type of hybridisation occur in
a) BrF₅
b) BrF₃