HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

Explain anomalous behaviour of oxygen in group 16 with respect to:

1. Atomicity
2. Magnetic property
3. Oxidation state

Write two uses of dioxygen.

Explain the structure of ClF₃

Iodine exists as

• polar molecular solid
• ionic solid
• nonpolar molecular solid
• hydrogen bonded molecular solid

Draw structure of Chlorine trifluoride

Write ‘four’ uses of hydrochloric acid.

Write chemical formula of the following oxoacids of chlorine:

a. Hypochlorous acid

b. Chlorous acid

c. Chloric acid

d. Perchloric acid

Draw structure of Chlorine pentafluoride

Describe anomalous behaviour of fluorine with the other elements of group 17 wilh reference to :

(a) Hydrogen bonding

(b) Oxidation state

(c) Polyhalide ions

Arrange the following oxyacids of chlorine – HClO, HClO₂, HClO₃, and HClO₄ with respect to Increasing order of thermal stability.

What happens when thin copper leaves are thrown in jar containing chlorine?

What is the action of chlorine (Cl) on the following:

Cold and dilute caustic soda

What is the action of chlorine (Cl) on the following:

Hot and concentrated caustic soda

What is the action of chlorine (Cl) on the following:

Potassium bromide solution

Arrange the following oxyacids of chlorine - HClO, HClO₂, HClO₃, and HClO₄ with respect to increasing order of oxidizing power.

Write any two uses of Chlorine.

What is the action of chlorine on CS₂

Answer the following.

What is the action of chlorine on Excess NH₃.

Draw the structure of IF₇. Write its geometry and the type of hybridization.

Arrange the following oxyacids of chlorine in decreasing order of their thermal stability. Give reason.
 HOClO, HOCl, HClO₄, HOClO₂