What is the role of quick lime in the extraction of Iron from its oxide Fe₂O₃?

Name some elements that occur as native elements.

What is Ellingham diagram?

What is calcination? Give example.

What is catenation ? describe briefly the catenation property of carbon.

What is burnt alum?

Name the two important ores of Boron.

Give the uses of helium.

How is ammonia prepared in the lab?

Account for the following:
(i) O-O bond lengths in ozone molecule are identical.
(ii) Most of the reactions in fluorine are exothermic.

Justify the position of lanthanoids and actinoids in the periodic table.

Write ionic equation for the reaction between Cr₂O₇^-2 ions and Fe²⁺ ions in acidic medium.

Why Zn²⁺ salts are white while Ni²⁺ salts are coloured?

What are the conditions for alloy formation?

Write the formula for the co-ordination compounds. 

Give an example of coordination compound used in medicine and two examples of biologically important coordination compounds.

Write the IUPAC name of the complex.

Give reason for the following: Optical isomerism is not shown by square planar complexes.

What are Co-ordination isomers? Give examples

CuSO₄ on mixing with NH₃ (1:4 ratio) does not give test for Cu²⁺ ions but gives test for SO₄^2-ions why?

Differentiate crystalline solids and amorphous solids.

What is the total number of atoms per unit cell in a face - centered cubic structure (fcc)?

Aluminium crystallises in a fee structure. Atomic radius of the metal is 125 pm. What is the length of the side of the unit cell of the metal?

In CaF₂ crystal, Ca²⁺ ions are present in arrangement. Calculate the number of F^- ions in the unit cell.

Derive integrated rate law for a zero order reaction A\(\longrightarrow \) product.

What is the study of chemical kinetics used for?

The reaction A + 2B ⟶ C obeys the rate equation. Rate = \(K{ \left[ A \right] }^{ \frac { 1 }{ 2 } }{ \left[ B \right] }^{ \frac { 3 }{ 2 } }\) What is the order of the reaction?

If the rate of a reaction gets doubled as the temperature is increased from 27^oC to 37^oC. Find the activation energy of reaction?

Discuss the Lowry – Bronsted concept of acids and bases.

Calculate the concentration of OH^- in a fruit juice which contains \(2\times10^{-3}\) M, H₃O⁺ ion. Identify the nature of the solution.

What are the two types of buffer? Give an example for each.

Why is aqueous solution of FeCl₃ acidic?

Why is anode in galvanic cell considered to be negative and cathode positive electrode?

Define conductance. Give its unit

Account for the following : For a strong electrolyte molar conductivity decreases as concentration increases

Explain the function of a salt bridge in an electrochemical cell.

What is the principle used in secondary batteries to regenerate the original reactants?

Name the anode, cathode and electrolyte used in lithium - ion Battery

Define electrochemical equivalent.

In case of chemisorption, why adsorption first increases and then decreases with temperature?

Define adsorption isotherm.

What are main impurities in a colloidal solution?

Gelatin acts as a protective colloid. Explain.

What are promoters? Give an example.

Draw the major product formed when 1-ethoxyprop-1-ene is heated with one equivalent of HI.

A Compound (A) with molecular formula C₂H₃N on acid hydrolysis gives (B) which reacts with thionylchloride to give compound(C). Benzene reacts with compound (C) in presence of anhydrous AlCl₃ to give compound(D). Compound (D) on reduction with Zn/Hg and Conc.HCl gives (E).  Identify (A), (B), (C) (D) and (E). Write the equations.

Derive the relation between f and R for a spherical mirror.

What happens when
i. 2 – Nitropropane boiled with HCl
ii. Nitrobenezene undergo electrolytic reduction in strongly acidic medium.
iii. Oxidation of tert – butylamine with KMnO₄
iv. Oxidation of acetoneoxime with trifluoroperoxy acetic acid

Name the Vitamins whose deficiency cause i) rickets ii) scurvy

Name one substance which can act as both analgesic and antipyretic.