What do you understand by the term mole ?

Define equivalent mass.

Balance the following equations by oxidation number method - \({ K }Mno_{ 4 }+{ Na }_{ 2 }{ So }_{ 3 }\longrightarrow { MnO }_{ 2 }+{ Na }_{ 2 }{ So }_{ 4 }+KOH\)

Calculate the equivalent mass of the following - Sodium Hydroxide

Give the number of electrons in the following species. H₂ , H₂ , O₂ and O_2^- 

Explain what is meant by efflorescence.

Give the mathematical expression that relates gas volume and moles.

Define Hess's law of constant heat summation.

What is the relation between K_P and K_C. Give one example for which K_P is equal to K_C.

Define equilibrium constant.

State Raoult law and obtain expression for lowering of vapour pressure when nonvolatile solute is dissolved in solvent.

Define bond energy.

Write a note on homologous series.

Explain the preparation of sodium fusion extract.

Write the structural formula for the following compounds.
(i) cyclohexa-I, 3-diene
(ii) methyl cyclopentane

What are electrophiles and nucleophiles ? Give suitable examples for each.

What are all the sources for human body that produces free radicals ?

Write the chemical equations for combustion of propane.

Mention the uses of alkenes.

Why chlorination of methane is not possible in dark?

Write a chemical reaction useful to prepare the following:
i) Freon-12 from Carbon tetrachloride
ii) Carbon tetrachloride from carbon disulphide

Explain the action of Ethyl chloroformate with Methyl magnesium iodide.
Ethyl chloroformate reacts with Grignard reagent to form esters as follows

(i) Pick the acid odd out with respect to acid rain. H₂SO₄ , HCl, HNO₃ , H₂CO₃ , CH₃COOH, H₂SO₃
(ii) Name the regions of atmosphere were, the temperature increases and decreases with altitude.

A large number of fishes are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish killing