Identify the metal that occurs in free state.

(a)

Al

(b)

Au

(c)

Mg

(d)

Ca

Which of the following statements is not correct?

(a)

Beryl is a cyclic silicate

(b)

Mg₂SiO₄ is an orthosilicate

(c)

SiO₄⁴⁻is the basic structural unit of silicates

(d)

Feldspar is not aluminosilicate

The high reactivity of fluorine is due to________.

(a)

high ionisation energy

(b)

low bond dissociation energy

(c)

low electron affinity

(d)

high electro negativity

Permanganate ion changes to ________ in acidic medium.

(a)

MnO₄²⁻

(b)

Mn²⁺

(c)

Mn³⁺

(d)

MnO₂

Which one of the following complexes is not expected to exhibit isomerism?

(a)

[Ni(NH₃)₄(H₂O)₂]²⁺

(b)

[Pt(NH₃)₂Cl₂]

(c)

[Co(NH₃)₅SO₄]Cl

(d)

[FeCl₆]^3-

A regular three dimensional arrangement of identical points in space is called _______.

(a)

Unit cell

(b)

Space lattice

(c)

Primitive

(d)

Crystallography

For a first order reaction, the rate constant is 6.909 min^-1 the time taken for 75% conversion in minutes is _______.

(a)

\(\left( \frac { 3 }{ 2 } \right) { \log 2 }\)

(b)

\(\left( \frac { 2 }{ 3 } \right) \log2\)

(c)

\(\left( \frac { 3 }{ 2 } \right) \log\left( \frac { 3 }{ 4 } \right) \)

(d)

\(\left( \frac { 2 }{ 3 } \right) \log\left( \frac { 4 }{ 3 } \right) \)

Using Gibb’s free energy change, ∆G^o=57.34 kJ mol^-1, for the reaction, X₂Y_(s)⇌2X⁺+Y^2- (aq), calculate the solubility product of X₂Y in water at 300 K_______. (R = 8.3 J K^-1Mol^-1)

(a)

10^-10

(b)

10^-12

(c)

10^-14

(d)

can not be calculated from the given dat

The conjugate base of NH^-₂ is _______.

(a)

NH^-

(b)

NH₃

(c)

NH⁺₃

(d)

NH^2-

The maximum work that can be derived from a chemical reaction is ______.

(a)

W_max = ΔH

(b)

W_max = ΔG

(c)

W_max = ΔE

(d)

W_max = ΔS

Adsorption of a gas on solid metal surface is spontaneous and exothermic, then ______.

(a)

ΔH increases

(b)

ΔS increases

(c)

ΔG increases

(d)

ΔS decreases

Oxidation of ethylene glycol with HIO₄ gives _______.

(a)

\(\overset { CHO }{ \underset { { CH }_{ 2 } }{ | } }\)

(b)

\(\overset { CH }{ \underset { CHO }{ | } } \)

(c)

\(\overset { COOH }{ \underset { COOH }{ | } } \)

(d)

HCHO

Benzoic acid \(\overset { i){ NH }_{ 3 } }{ \underset { ii)\Delta }{ \longrightarrow } } A\overset { NaOBr }{ \longrightarrow } B\overset { NaN{ O }_{ 2 }/HCl }{ \longrightarrow } \) C 'C'  is ______.

(a)

anilinium chloride

(b)

O – nitro aniline

(c)

benzene diazonium chloride

(d)

m– nitro benzoic acid

Nitro-acinitro tautomerism is exhibited by ____________

(a)

nitromethane

(b)

nitrobenzene

(c)

chloropicrin

(d)

o-toluidine

What is calcination? Give example.

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

Give the reason for bleaching action of Cl₂.

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

Give any three characteristics of ionic crystals.

Mention the factors that affected the rate of a chemical reaction.

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

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

Is it possible to oxidise t – butyl alcohol using acidified dichromate to form a carbonyl compound.

Write the complete set of reactions occurring in the zone of reduction in the blast furnace in the metallurgy of iron.

Complete the following equations.
(i) Cr₂O₇^2- + 2OH^- ⟶
(ii) MnO₄^- + 4H⁺ + 3e^- ⟶

What is salt bridge? How is it represented in a cell diagram?

What happens when a colloidal sol of Fe(OH)₃ and As₂S₃ are mixed?

Complete the following sequence of reaction and Identify A, B and C.

An alkene (A) on ozonolysis gives propanone and aldehyde (B). When (B) is oxidised (C) is obtained. (C) is treated with Br₂/P gives (D) which on hydrolysis gives (E). When propanone is treated with HCN followed by hydrolysis gives (E). Identify A, B, C, D and E.

An organic compound 'A' on reduction gives compound 'B' which on reaction with trichloromethane and caustic potash forms 'C'. Compound 'C' on catalytic reduction given N-methyl benzenamine. Identify A, B and C and write the reactions involved.

Give the sources of vitamin A and E and list the deficiency disease caused by lack of vitamin A and E in diet.

How is Low density polyethene prepared?

1. How will you convert acetylene into n-butyl alcohol.

2. How will acetic anhydride react with the following reagents?
   (i) HOH
   (ii) C₂H₅OH

1. Will a precipitate be formed when 0.150 L of 0.1M Pb(NO₃)₂ and 0.100L of 0.2 M NaCl are mixed? \(K_{sp}\ (PbCl_{2})=1.2\times10^{-5}\).

2. Explain the various chemical methods by which colloids can be prepared.

1. Ionic solids, which have anionic vacancies due to metal excess defect, develop colour. Explain with the help of a suitable example.

2. From the following data, show that the decomposition of hydrogen peroxide is a reaction of the first order:

   t(min)	0	10	20
   V(ml)	46.1	29.8	19.3

   Where t is the time in minutes and V is the volume of standard KMnO₄ solution required for titrating the same volume of the reaction mixture.

1. Write a short note on the oxidation states of 3d series elements.

2. What is meant by stability of a co-ordination compound in solution? State the factors which govern stability of complexes.

1. A hydride of 2nd period alkali metal (A) on reaction with compound of Boron (B) to give a reducing agent (C). Identify A, B and C.

2. An element 'A' occupies group number 15 and period number 3. It reacts with chlorine to give B which further reacts with chlorine to give C at 273K. Both B and C are chlorinating agents for organic compounds. C is a better chlorinating agent because it chlorinates metals also. Breasts with SO₃ and reduces it to SO₂ B has a pyramidal shape. C has trigonal bipyramidal shape by sp³d hybridisation. Identify the element A and the compounds B and C. Write the reactions.