HSC Science (Electronics) इयत्ता १२ वी - Maharashtra State Board Important Questions for Chemistry

Define the half-life of a first-order reaction.

Which of the following correctly represents integrated rate law equation for a first order reaction in a gas phase?

What is the rate constant?

What is zero order reaction?

If unit of rate constant is mol dm⁻³s⁻¹, the order of reaction would be ______.

For the reaction A + B → P.

If [B] is doubled at constant [A], the rate of reaction doubled. If [A] is triple and [B] is doubled, the rate of reaction increases by a factor of 6. Calculate the rate law equation.

The half-life period for the first order reaction is 1.7 hrs. How long will it take for 20% of the reactant to disappear?

Describe anomalous behaviour of oxygen as compared with other elements of group 16 with reference to -
(a) Magnetic property                                        
(b) Oxidation state
(c) Hydrides

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

Write electronic configuration and two uses of neon. (Z = 10)

Write any two uses of Chlorine.

Write the electronic configuration of the following element:

Krypton (Z = 36)

What is the action of chlorine on CS₂

Answer the following.

What is the action of chlorine on Excess NH₃.

Write any ‘four points’ of difference between fluorine and other halogens.