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

Out of coke and CO, which is better reducing agent for the reduction of ZnO? Why?

Name some elements that occur as native elements.

What is leaching?

Describe briefly allotropism in p- block elements with specific reference to carbon.

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

Write the reaction of diboranes with water and alkali.

Give the formula of chlorosilazanes. Explain its preparation from SiCI₄.

Give the oxidation state of halogen in the following.
a) OF₂
b) O₂F₂
c) Cl₂O₃
d) I₂O₄

Give two uses of nitric acid.

How is SO₂ an air pollutant?

What are inner transition elements?

Complete the following.
a. 3MnO₄^2- + 4H⁺ ⟶?
b. C₆H₅CH₃ \(\overset { acidified }{ \underset { KMnO_{ 4 } }{ \longrightarrow } } \)?
c. MnO₄^- + Fe²⁺ ⟶?
d. KMnO₄ \(\overset { \triangle }{ \underset { Red\ hot }{ \longrightarrow } } \) ?
e. Cr₂O₇^2- + 6I^- + 14H⁺ ⟶?
f. Na₂Cr₂O₇ + 2KCl ⟶?

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

Calculate the magnetic moment of Fe³⁺ ion (Atomic no. of Fe = 26)

Many industrial processes use transition metal or their compounds as catalyst. Why?

Draw the structure of permanganate ion.

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.

Give the names of two complexes which are used in medicines.

Write the IUPAC name of [Ag(NH₃)₂]Cl.

Give an example for the complexes possessing co-ordination number 8 and 7

Identify the ligand and the central metal in the Co-ordination compound. [Co(NH₃)₄Cl₆]CI

Define unit cell.

Distinguish between hexagonal close packing and cubic close packing.

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

Describe the graphical representation of first order reaction.

Explain the effect of catalyst on reaction rate with an example.

Consider the oxidation of nitric oxide to form NO₂
2NO_(g) + O_2(g) ➝2NO_2(g)
(a). Express the rate of the reaction in terms of changes in the concentration of NO,O₂ and NO₂.
(b). At a particular instant, when [O₂] is decreasing at 0.2 mol L⁻¹s⁻¹ at what rate is [NO₂] increasing at that instant?

Account for the acidic nature of HClO₄ in terms of Bronsted – Lowry theory, identify its conjugate base.

The concentration of hydroxide ion in a water sample is found to be 2.5 × 10^-6M. Identify the nature of the solution.

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

Describe the electrolysis of molten NaCl using inert electrodes

Which of 0.1M HCl and 0.1 M KCl do you expect to have greater \(\stackrel{0}{\Lambda}_{\mathrm{m}}\)and why?

The resistance of a conductivity cell is measured as 190 Ω using 0.1M KCl solution (specific conductance of 0.1M KCl is 1.3 Sm^-1). When the same cell is filled with 0.003 M sodium chloride solution, the measured resistance is 6.3KΩ. Both these measurements are made at a particular temperature. Calculate the specific and molar conductance of NaCl solution.

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

The mechanism of Fridel crafts reaction is given below
\({ C }_{ 6 }{ H }_{ 5 }+{ { CH }_{ 3 }Cl\overset { anhydrous\\ \quad { Alcl }_{ 3 } }{ \longrightarrow } }{ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 3 }+HCl\)

Formation of water due to the reaction of H₂ and O₂ in the presence of Cu proceeds as follows. Steps in the reaction H₂ + 1/2O₂ → H₂O can be given as

What is the major product obtained when two moles of ethyl magnesium bromide is treated with methyl benzoate followed by acid hydrolysis.

Can we use nucelophiles such as NH₃,CH₃O ^- for the Nucleophilic substitution of alcohols

Identify X and Y.
\({ CH }_{ 3 }CO{ CH }_{ 2 }{ CH }_{ 2 }COO{ C }_{ 2 }{ H }_{ 5 }\overset { { CH }_{ 3 }MgBr }{ \longrightarrow } X\overset { { H }_{ 3 }{ O }^{ + } }{ \longrightarrow } Y\)

What is angle of deviation due to reflection?

Write down the possible isomers of the C₄H₉NO₂ give their IUPAC names.

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

Identify compounds A, B and C in the following sequence of reactions.
i) \({ C }_{ 6 }{ H }_{ 5 }NO_{ 2 }\overset { Fe/HCL }{ \longrightarrow } A\overset { HN{ O }_{ 2 } }{ \underset { 273K }{ \longrightarrow } } B\overset { { C }_{ 6 }{ H }_{ 5 }OH }{ \longrightarrow } C\)
ii) \({ C }_{ 6 }{ H }_{ 5 }N_{ 2 }cl\overset { CuCN }{ \longrightarrow } A\overset { H_{ 2 }O/H^{ + } }{ \longrightarrow } B\overset { NH_3 }{ \longrightarrow } C\)
iii) \({ C }{ H }_{ 3 }{ C }{ H }_{ 2 }I\overset { NaCN}{ \longrightarrow } A\overset {OH^-}{ \underset {Partial hydrolysis}{ \longrightarrow } } B\overset {NaOH+Br_2 }{ \longrightarrow } C\)
iv) \({ C }{ H }_{ 3 }NH_{ 2 }\overset { CH_3 Br }{ \longrightarrow } A\overset { CH_{ 3 }COCl}{ \longrightarrow } B\overset { B_2H_6 }{ \longrightarrow } C\)
v) \({ C }_{ 6 }{ H }_{ 5 }NH_{ 2 }\overset { (CH_{ 3 }CO)_{ 2 }O }{ \underset { Pyridine }{ \longrightarrow } } A\overset { HNO_{ 3 } }{ \underset { H_{ 2 }SO_{ 4 },288K }{ \longrightarrow } } B\overset { { H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow C } \)
vi) 

vii) \({ C }{ H }_{ 3 }CN_{ 2 }NC\overset { HgO }{ \longrightarrow } A\overset { H_{ 2 }O }{ \longrightarrow } B\overset { i) NaN{ O }_{ 2 }/HCL }{ \underset { ii){ H }_{ 2 }O }{ \longrightarrow } } \)

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

Write a short note on peptide bond.

Which chemical is responsible for the antiseptic properties of dettol.

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

What are food preservatives?