Bauxite has the composition ______.

(a)

Al₂O₃

(b)

Al₂O₃.nH₂O

(c)

Fe₂O₃.2H₂O

(d)

None of these

Electrochemical process is used to extract_______.

(a)

Iron

(b)

Lead

(c)

Sodium

(d)

silver

Which one of the following element is present as a impurity in pig iron?

(a)

Phosphorus

(b)

Manganese

(c)

Carbon

(d)

Silicon

\({ Zn }_{ (s) }+2\left[ Au(CN)_{ 2 } \right] ^{ - }_{ (aq) }\longrightarrow \left[ Zn(CN)_{ 4 } \right] ^{ 2- }_{ (aq) }+2A{ { u }_{ (s) } }\) In the above equation the oxidation state of metallic gold is_______

(a)

1

(b)

0

(c)

+2

(d)

-2

Metal oxide is converted into metal by the _______ process.

(a)

Calcination

(b)

roasting

(c)

smelting

(d)

beesemerisation

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

Column-I		Column-II
A	Borazole	1	B(OH)3
B	Boric acid	2	B3N3H6
C	Quartz	3	Na2[B4O5(OH)4]8H2O
D	Borax	4	SiO2

(a)

A	B	C	D
2	1	4	3

(b)

A	B	C	D
1	2	4	3

(c)

A	B	C	D
1	2	4	3

(d)

None of these

Graphite has _______.

(a)

2-d sheet structure

(b)

Vander waals force between successive layers of carbon sheets

(c)

Sp² hybridised carbon linked with other three carbon atoms in hexagonal planar structure

(d)

all the above

Boron compounds behave as Lewis acid, because of their _______.

(a)

ionisation property

(b)

acidic nature

(c)

covalent nature

(d)

electron deficient nature

Allotropy is due to ______.

(a)

difference in chemical properties

(b)

difference in the number of atoms in the molecules

(c)

difference in the arrangement of atoms in the molecules in the crystal

(d)

None of these

Assertion: Bond dissociation energy of fluorine is greater than chlorine gas
Reason: Chlorine has more electronic repulsion than fluorine.
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion.
b) Both assertion and reason are true but reason is not the correct explanation of assertion
c) Assertion is true but reason is false
d) Both assertion and reason are false

(a)

Both assertion and reason are true and reason is the correct explanation of assertion.

(b)

Both assertion and reason are true but reason is not the correct explanation of assertion

(c)

Assertion is true but reason is false

(d)

Both assertion and reason are false

On oxidation with iodine, sulphite ion is transformed to _______.

(a)

S₄O₆^2-

(b)

S₂O₆^2-

(c)

SO₄^2-

(d)

SO₃^2-

Which is dibasic?

(a)

Orthophosphoric acid

(b)

Pyrophosphoric acid

(c)

Orthophosphorus acid

(d)

Hypophosphorus acid

The hybridisation and shape of SF₆ is respectively?

(a)

sp³d², square planar

(b)

sp³d², octahedral

(c)

sp³d see-saw

(d)

sp³d, trigonal bipyramindal

The incorrect statement regarding structure of ozone is______.

(a)

Bond angle is less than 120°

(b)

It is linear

(c)

The two oxygen-oxygen bond length in ozone are identical

(d)

Both (b) and (c).

Which one of the following ions has the same number of unpaired electrons as present in V³⁺?

(a)

Ti³⁺

(b)

Fe³⁺

(c)

Ni²⁺

(d)

Cr³⁺

The actinoid elements which show the highest oxidation state of +7 are _______.

(a)

Np, Pu, Am

(b)

U, Fm, Th

(c)

U, Th, Md

(d)

Es, No, Lr

CrO₃ is coloured due to_______.

(a)

Low l.E

(b)

Crystal defects

(c)

Charge transfer spectra

(d)

Unpaired electrons

The general electronic configuration of d-block elements can be written as ________.

(a)

[Noble gas]n - 1d^1-10 ns^1-2

(b)

[Noble gas]n - 1d^-10 n^1-6

(c)

[Noble gas]n - 2 d¹⁰ ns^1-2

(d)

[Noble gas]n - 2 d¹⁰ ns^1-6

Equivalent weight of KMnO₄ in acidic medium is _______.

(a)

3.16

(b)

31.6

(c)

158

(d)

52.67

Which type of isomerism is exhibited by [Pt(NH₃)₂Cl₂]?

(a)

Coordination isomerism

(b)

Linkage isomerism

(c)

Optical isomerism

(d)

Geometrical isomerism

How many geometrical isomers are possible for [Pt(Py)(NH₃)(Br)(Cl)]?

(a)

3

(b)

4

(c)

0

(d)

15

The ligand capable of coordinating in two or more ways with the central metal ion are called _______ ligands.

(a)

didentate

(b)

tridentate

(c)

ambidentate

(d)

none of the above

An example of ambidentate ligand is _________.

(a)

cyano

(b)

nitro

(c)

chloro

(d)

triphenylphosphine

______is used as an antitumor drug in cancer treatment.

(a)

Ca - EDTA

(b)

Cis - platin

(c)

Sodium thio sulphate

(d)

Nickel chloride

Solid CO₂ is an example of ________.

(a)

Covalent solid

(b)

metallic solid

(c)

molecular solid

(d)

ionic solid

CsCl has bcc arrangement, its unit cell edge length is 400pm, its inter atomic distance is ________.

(a)

400pm

(b)

800pm

(c)

\(\sqrt { 3 } \times 100pm\)

(d)

\(\left( \frac { \sqrt { 3 } }{ 2 } \right) \times 400pm\)

The site labelled as 'X' in FCC arrangement is_______.

(a)

Face with 1/4 contribution

(b)

Edge with 1/4 contribution

(c)

Corner with 1/4 contribution

(d)

Tetrahedral void with 1/8 contribution

Iodine crystals are ________.

(a)

covalent

(b)

ionic

(c)

metallic

(d)

molecular

Crystals of NaCI has yellow colour due the presence of_________.

(a)

cation vaccancy

(b)

F centres

(c)

both (a) and (b)

(d)

neither (a) nor (b)

During the decomposition of H₂O₂ to give dioxygen, 48 g O₂ is formed per minute at certain point of time. The rate of formation of water at this point is

(a)

0.75 mol min⁻¹

(b)

1.5 mol min⁻¹

(c)

2.25 mol min⁻¹

(d)

3.0 mol min⁻¹

The half life period of a radioactive element is 140 days. After 560 days, 1 g of element will be reduced to

(a)

\(\left( \frac { 1 }{ 2 } \right) g\)

(b)

\(\left( \frac { 1 }{ 4 } \right) g\)

(c)

\(\left( \frac { 1 }{ 8 } \right) g\)

(d)

\(\left( \frac { 1 }{ 16 } \right) g\)

Which order reaction obeys the expression \({ t }_{ \frac { 1 }{ 2 } }\alpha \frac { 1 }{ \left[ A \right] } ?\)

(a)

First

(b)

Second

(c)

Third

(d)

Zero

For an exothermic chemical process occurring in 2 steps as
(i) A +B ⟶ X (slow) ;
(ii) X ⟶  AB (fast)
The progress of the reaction can be best described by (x- intermediate).

(a)

(b)

(c)

(d)

None of these

What will be the rate constant of a order reaction if its half life is given to be 20 min?

(a)

13.86 min^-1

(b)

28.86 min^-1

(c)

3.47 x 10^-2 min^-1

(d)

None of these

The solubility of BaSO₄ in water is 2.42 × 10^-3gL^-1 at 298K. The value of its solubility product(K_sp) will be (Given molar mass of BaSO₄ =233g mol^-1)

(a)

1.08 × 10^-14mol²L^-2

(b)

1.08 × 10^-12mol²L^-2

(c)

1.08 × 10^-10mol²L^-2

(d)

1.08 × 10^-8mol²L^-2

pH of a saturated solution of Ca(OH)₂ is 9. The Solubility product (K_sp) of Ca(OH)₂ _______.

(a)

0.5 × 10^-15

(b)

0.25 × 10^-10

(c)

0.125 × 10^-15

(d)

0.5 × 10^-10

An example of basic buffer is _______.

(a)

NH₄OH and NH₄CI

(b)

NH₄OH and NaOH

(c)

NaOH and NH₄Cl

(d)

NaOH and KOH

\({ X }_{ m }{ Y }_{ n(s) }\overset { { H }_{ 2 }O }{ \rightleftharpoons } { mX }_{ (aq) }^{ n+ }+{ nY }_{ (aq) }^{ m- }\)

(a)

\({ [{ X }^{ n+ }] }^{ m }{ [Y^{ m- }] }^{ n }\)

(b)

\({ [X }^{ n+ }][{ Y }^{ m- }]\)

(c)

\({ [{ X }^{ n+ }] }^{ m }/{ [Y^{ m- }] }^{ n }\)

(d)

\({ [X }^{ n+ }]/[{ Y }^{ m- }]\)

According to Lowry - Bronsted theory, an acid is a _________.

(a)

electron donor

(b)

electron acceptor

(c)

proton donor

(d)

prof on acceptor

Among the following cells
I) Leclanche cell
II) Nickel – Cadmium cell
III) Lead storage battery
IV) Mercury cell
Primary cells are ____.

(a)

I and IV

(b)

I and III

(c)

III and IV

(d)

II and III

The equivalent conductance of M/36 solution of a weak monobasic acid is 6 mho cm² equivalent^-1 and at infinite dilution is 400 mho cm² equivalent^-1. The dissociation constant of this acid is ______.

(a)

1.25 x 10⁻⁶

(b)

6.25 x 10^-6

(c)

1.25 x 10⁻⁴

(d)

6.25 x 10 ^-5

Ionic conductance at infinite dilution of Al³⁺ and SO^2-₄ are 1890 ohm^-1 cm² gm equiv^-1 and 1600 ohm^-1 cm^-2 gm equiv^-1 respectively. The equivalent conductance is ______.

(a)

143 mho cm² gm equiv^-1

(b)

850 mho cm² gm equir^-1

(c)

153 mho cm² gm equiv^-1

(d)

314 mho cm² gm equir^-1

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

Unit of resistivity is ______.

(a)

ohm metre

(b)

siemen

(c)

sm^-1

(d)

mho

Fog is colloidal solution of _______.

(a)

solid in gas

(b)

gas in gas

(c)

liquid in gas

(d)

gas in liquid

Collodion is a 4% solution of which one of the following compounds in alcohol – ether mixture?

(a)

Nitroglycerine

(b)

Cellulose acetate

(c)

Glycoldinitrate

(d)

Nitrocellulose

A substance which destroys the activity of a catalyst is_______.

(a)

negative catalyst

(b)

catalytic poison

(c)

both (a) and (b)

(d)

promoter

The emulsifying agent used in O/W type is _______.

(a)

lamp black

(b)

alcohols

(c)

gums

(d)

heavy metal salts of fatty acids

An example of lyophilic colloid is________.

(a)

sulphur in water

(b)

phosphorus in water

(c)

starch

(d)

all of these

(CH₃)₃-C-CH(OH) CH₃ \(\overset { con{ H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow } \)X (major product)

(a)

(CH₃)₃ CCH = CH₂

(b)

(CH₃)₂C = C (CH₃)₂

(c)

CH₂= C(CH₃)CH₂-CH₂- CH₃

(d)

CH₂= C (CH₃) - CH₂- CH₂- CH₃

The reaction

Can be classified as ______.

(a)

dehydration

(b)

Williams on alcoholsynthesis

(c)

Williamson ether synthesis

(d)

dehydrogenation of alcohol

Predict the structure of propane-1,2 diol ______.

(a)

CH₂ (OH) - CH₂CH₂OH

(b)

HOCH₂ - CH₂OH

(c)

CH₃CH (OH) CH₂OH

(d)

None of these

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

On heating, peroxides are ________.

(a)

stable

(b)

unstable

(c)

decomposes violently

(d)

both (b) and (c)

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

The reagent used to distinguish between acetaldehyde and benzaldehyde is _______.

(a)

Tollens reagent

(b)

Fehling’s solution

(c)

2,4 – dinitrophenyl hydrazine

(d)

semicarbazide

The formation of cyanohydrin from a ketone is an example of _______.

(a)

electrophilic addition

(b)

nucleophilic addition

(c)

nucleophilic substitution

(d)

electrophilic substitution

With respect to the reagents given below, pick out the odd one _________.

(a)

P₂O₃

(b)

P₂O₅

(c)

H₂SO₄

(d)

K₂Cr₂O₇

\({ CH }_{ 3 }CO{ CH }_{ 3 }\overset { { conc.H }_{ 2 }{ SO }_{ 4 } }{ \longrightarrow } ?\) The product is __________.

(a)

mesitylene

(b)

mesity oxide

(c)

phorone

(d)

paraldehyde

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

Describe a method for refining nickel. (or) Explain the Mond process of refining nickel.

Name the metals that are obtained from their oxides using hydrogen as reducing agent.

Write the chemical reactions involved in the extraction of gold by cyanide process. Also give the role of zinc in the extraction.

Boron does not react directly with hydrogen. Suggest one method to prepare diborane from BF₃.

Give the structure of CO and CO₂.

What happens to CO₂ when dissolved in water?

Name the building block of zeolites. Why zeolites have high porosity?

What is inert pair effect?

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

Elements of group 16 show lower value of first ionization enthalpy compared to group 15, why?

Why hydrides of oxygen is a liquid whereas hydride of sulphur is a gas?

Explain the oxidation states of 4d series elements.

Explain why compounds of Cu²⁺ are coloured but those of Zn²+ are colourless.

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

A poster suggests the following life style on the part of families / individuals.
(i) Which environmental values are promoted through these life style?
(ii) Suggest one additional life style action for promotion of green chemistry.
(iii) Give reason for the bleaching action of  KMnO₄

Calculate the ratio of \(\frac { \left[ { Ag }^{ + } \right] }{ \left[ Ag\left( NH_{ 3 } \right) _{ 2 } \right] ^{ + } } \) in 0.2 M solution of NH_3. If the stability constant for the complex \([Ag(NH_{ 3 })_{ 2 }]^{ + }\) is 1.7 x 10⁷

[Ti(H₂O)₆]³⁺ is coloured, while [Sc(H₂O)₆]³⁺ is colourless- explain.

Write a neutral molecule in which the central atom is Sp³d² hybridised.

What is the coordination number of central metal ion in [Fe(C₂O₄)₃]^3-?

Classify the following as amorphous or crystalline solids. Polyurethane, Naphthalene, Benzoic acid, Teflon, Potassium nitrate, Cellophane, Polyvinyl chloride, Fiber glass, Copper.

NaCI has a sharp melting point but glass does not - Justify.

Describe the graphical representation of first order reaction.

The rate law for a reaction of A, B and C has been found to be rate = k[A]²[B][L]^3/2 How would the rate of reaction change when
(i) Concentration of [L] is quadrupled
(ii) Concentration of both [A] and [B] are doubled
(iii) Concentration of [A] is halved
(iv) Concentration of [A] is reduced to \(\left(\frac{1}{3}\right)\) and concentration of [L] is quadrupled.

For a chemical reaction, Variation in the concentration In[A] Vs time in seconds is given as

(i) What is the order of the reaction?
(ii) What is the unit of rate constant K?
(iii) Give the relationship between k and \({ t }_{ \frac { 1 }{ 2 } }\)

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?

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

Calculate the pH of 0.001M HCl solution

Define Buffer solution.

How is common ion effect related to the solubility of the electrolyte?

Describe the construction of Daniel cell. Write the cell reaction.

Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is 12.04 x 10^-2 Sm^-1.

On what does the emf of a lead storage battery depend?

Higher the standard reduction potential lesser is corrosion. Give reason.

Write a note on dialysis.

Which will adsorb more gas, a lump of charcoal or its powder and why?

Give reasons: Methanol is miscible with water while iodo-methane is not.

Preparation of ethers by intermolecular dehydration of alcohols in the presence of an add is not a suitable method for mixed ethers. Give reason.

Complete the following reaction

Write the structural formula of
(i) p - methyl benzaldehyde
(ii) 2 - methyl cyclohexanone

Give the uses of zinc.

What is meant by aluminotherrnitc process?

Complete the following reactions.
a. \(B(OH)_3 + NH_3\longrightarrow \)
b. \(Na_{ 2 }B_{ 4 }{ O }_{ 7 }+{ { H }_{ 2 }{ SO }_{ 4 }+{ 5H }_{ 2 }O\longrightarrow }\)
c. \({ B }_{ 2 }{ H }_{ 6 }+2NaOH+2{ H }_{ 2 }O\longrightarrow \)
d. \({ B }_{ 2 }{ H }_{ 6 }+6{ CH }_{ 3 }OH\longrightarrow \)
e. \(4{ BF }_{ 3 }+3{ H }_{ 2 }O\longrightarrow \)
f. \(HCOOH+{ H }_{ 2 }{ SO }_{ 4 }\longrightarrow \)
g. \(2SiCl_{ 4 }+NH\)₃
h. SiCl₄ + 4C₂H₅OH \(\rightarrow\)
i. 2\(B+6NaOH\longrightarrow \)
j. \({ H }_{ 2 }{ B }_{ 4 }{ O }_{ 7 }\overset { Red\ hot }{ \rightarrow } \)

Account for the following:
(i) CO is used in the extraction of metals.
(ii) CO is poisonous
(iii) CO₂ is used in referigeration

Give a reason to support that sulphuric acid is a dehydrating agent.

Explain the commercial method of preparation of nitric acid.

Explain the variation in E⁰_{M³⁺/M²⁺}  3d series.

What is meant by lanthanoid contraction?

Why tetrahedral complexes do not exhibit geometrical isomerism.

Match the common name with formula and the IUPAC ligand name.

Common name	Formula	IUPAC ligand name
Bromide	C2O42-	Carbonato
Nitrate	Br-	Oxalato
hydroxide	NO3-	hydroxido
Carbonate	OH-	bromido
Oxalate	CO32-	nitrato

Why are solids incompressible?

Identify the order for the following reactions
(i) Rusting of Iron
(ii) Radioactive disintegration of ₉₂U²³⁸
(iii) 2A+3B⟶ products ;rate = k[A]^1/2[B]²

The rate constant for a first order reaction is 60 S^-1. How much time will it take to reduce the initial concentration of the reactant to its \({ \frac { 1 }{ 16 } }^{ th }\) value?

Define pH.

Based on Arrhenius concept, defame acid and bases and give an example for each.

The conductivity of a 0.01M solution of a 1 :1 weak electrolyte at 298K is 1.5\(\times\)10^-4 S cm⁻¹.
i) molar conductivity of the solution
ii) degree of dissociation and the dissociation constant of the weak electrolyte
Given that
\(\lambda^{0}_{cation}=248.2 \ S\) cm² mol^-1
\(\lambda^{0}_{anlon}=51.8 \ S\) cm² mol^-1

Give the oxidation and reduction half cell reaction taking place in the Daniel cell.

What are the factors which influence the adsorption of a gas on a solid?

Write a note on auto catalysis?

Write the mechanism of acid catalysed dehydration of ethanol to give ethene.

Halo alkane are easily prepared from alcohols while alkyl halides cannot be prepared from phenol. Justify.

Write short notes on Popoff's rule.

List out the application of aluminum.

What are the various methods by which carbon-di-oxide is prepared?

How is sulphuric acid manufacture by contact process?

Complete the following reactions
(i) Cr₂O₇^2- ⟶
(ii) Cr₂O₇^2- + 6I^-+ 14H⁺ ⟶
(iii)  Cr₂O₇^2-+ 3S^2-+ 14H⁺ ⟶
(iv) Cr₂O₇^2- + 3SO₂ + 2H⁺ ⟶
(v) Cr₂O₇^2- + 3Sn²⁺ + 14H⁺ ⟶
(vi) K₂Cr₂O₇ + 8H₂SO₄ + 3CH₃CH₂OH ⟶
(vii) 2MnO₄^- + 5(COO)^2- + 6H⁺ ⟶
(viii) 2MnO₄^- + 10I^- + 16H⁺ ⟶
(ix) 2MnO₄^- + 5S^2-+ 16H⁺ ⟶
(x) 2MnO₄^- + 5NO₂^- + 6H⁺ ⟶
(xi) 2KMnO₄ + 3H₂SO₄ + 5CH₃CH₂OH ⟶
(xii) 2MnO₄^- + 5SO₃^2- + 6H⁺ ⟶

For the complex [NiCI₄]^2- write (i) the IUPAC name (ii) The hybridisation type (iii) The shape of the complex

How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell? Explain.

State the characteristics of order of reactions. 

Derive the relationship between pH and pOH.

Specific conductance of 1M KNO₃ solution is oberved to be 5.55 x 10^-3 mho cm². What is the equivalent conductance of KNO₃ when one litre of the solution is used?

Explain electrodialysis

What are ethers? Write note on simple and mixed ethers with examples.

Compound (A) with Molecular formula C₇H₆O does not reduce Fehling's solution. Compound (A) reacts with acetone in the presence of NaOH to give a compound (B) which is an α, β-unsaturated compound. Further (A) reacts with dimethyl aniline in the presence of cone, H₂SO₄ to give compound (C) which is a dye. Identify (A) (B) and (C). Explain the reactions.