Bauxite has the composition ______.

(a)

Al₂O₃

(b)

Al₂O₃.nH₂O

(c)

Fe₂O₃.2H₂O

(d)

None of these

Extraction of gold and silver involves leaching with cyanide ion. silver is later recovered by_______.

(a)

Distillation

(b)

Zone refining

(c)

Displacement with zinc

(d)

liquation

The process of heating of copper pyrites to remove sulphur is called ________.

(a)

froth flotation

(b)

roasting

(c)

calcination

(d)

smelling

Ignition mixture used in aluminothermite process is ________.

(a)

Cr + AI₂O₃

(b)

Mg + BaO₂

(c)

AI + Cr₂O₃

(d)

Ba+MgO

In acid leaching process the insoluble sulphide is converted into soluble sulphate and elemental_______.

(a)

carbon

(b)

lead

(c)

sulphur

(d)

zinc

In diborane, the number of electrons that accounts for banana bonds is ________.

(a)

six

(b)

two

(c)

four

(d)

three

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

Select the incorrect statement regarding B₂H₆.

(a)

It contains B-B ionic bond

(b)

Each boron is Sp³ hybridised

(c)

It has two types of hydrogen bonds

(d)

it is used as a reducing agent

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

On moving down the group 13, density ______

(a)

decreases

(b)

increases

(c)

First decreases then increases

(d)

remains same

Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively_________.

(a)

P₄(red) & PH₃

(b)

P₄(white) & PH₃

(c)

S₈ & H₂S

(d)

P₄(white) & H₂S

The correct order of the thermal stability of hydrogen halide is_______.

(a)

HI > HBr > HCl > HF

(b)

HF > HCl > HBr > HI

(c)

HCl > HF > HBr > HI

(d)

HI > HCl > HF > HBr

Which of the following halides of group 15 is not hydrolysed?

(a)

NF₃

(b)

PF₃

(c)

NI₃

(d)

Both (a) and (b)

When Copper is heated with cone HNO₃ it produces

(a)

Cu (NO₃)₂ and N₂O

(b)

Cu (NO₃)₂ and NO₂

(c)

Cu (NO₃)₂ and NO

(d)

Cu (NO₃)₂ NO and N₂O

The incorrect statement among the following is _________.

(a)

Reducing character of hydrides of group 15 increases down the group

(b)

Basicity of hydrides of group 15 increases down the group

(c)

NCl₅ does not exist

(d)

Phosphorus and arsenic can form P\(\pi \)-d\(\pi \) bond but not nitrogen

Which of the following statements is not true?

(a)

on passing H₂S, through acidified K₂Cr₂O₇ solution, a milky colour is observed

(b)

Na₂Cr₂O₇ is preferred over K₂Cr₂O₇ in volumetric analysis

(c)

K₂Cr₂O₇ solution in acidic medium is orange in colour

(d)

K₂Cr₂O₇ solution becomes yellow on increasing the P^H beyond 7

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

What are the species X and Y in the following?

(a)

CrO₃, CrO₄^2-

(b)

CrO₃, Cr₂O₃

(c)

CrO₄^-2, Cr₂O₇^2-

(d)

H₂CrO₄, H₂Cr₂O₇

The correct statement is_______.

(a)

Cu₂Cl₂ and Ag₂S are coloured

(b)

Upon strong heating paramagnetic gases are evolved by NaNO₃ and AgNO₃

(c)

Green vitriol and blue vitriol are isomorphus

(d)

KMnO₄ and K₂Cr₂O₇ are coloured due to

Equivalent weight of KMnO₄ in acidic medium is _______.

(a)

3.16

(b)

31.6

(c)

158

(d)

52.67

The sum of primary valence and secondary valence of the metal M in the complex [M(en)₂(Ox)]Cl is________.

(a)

3

(b)

6

(c)

-3

(d)

9

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-

[FeF₆]^4- is paramagnetic because _______.

(a)

F^- is a weaker ligand

(b)

F^- is a strong ligand

(c)

F^- is a flexidentate ligand

(d)

F^- is a chelating ligand

Which of the following is not true about secondary valency?

(a)

It corresponds to the co-ordination number of metal

(b)

It is satisfied by negative ions or neutral molecule

(c)

They are non directional in nature

(d)

both (a) and (b)

The ionisation isomer of [Cr(H₂O)₄CI(NO₂)]Cl is _________.

(a)

[Cr(H₂O)₄Cl₂(NO)₂]

(b)

[Cr(H₂O)₄Cl₂]NO₂

(c)

[Cr(H₂O)₄Cl(ONO)]

(d)

both (a) and (b)

Solid CO₂ is an example of ________.

(a)

Covalent solid

(b)

metallic solid

(c)

molecular solid

(d)

ionic solid

In calcium fluoride, having the flurite structure the coordination number of Ca²⁺ ion and F^- Ion are ________.

(a)

4 and 2

(b)

6 and 6

(c)

8 and 4

(d)

4 and 8

In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

(a)

8

(b)

4

(c)

2

(d)

6

In the Bragg's equation for diffraction of X-rays, 'n' represents _______.

(a)

The number of moles

(b)

Avogadro number

(c)

A quantum number

(d)

Order of reflection

Frankel defect is also known as ________.

(a)

stoichiometric defect

(b)

dislocation defect

(c)

both (a) & (b)

(d)

non-stoichiometric defect

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)

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

If the initial concentration of the reactant is doubled, the time for half reaction is also doubled. Then the order of the reaction is______.

(a)

Zero

(b)

one

(c)

Fraction

(d)

none

2N₂O₅ ⟶ NO₂ + O₂, \(\frac { d\left[ { N }_{ 2 }{ O }_{ 5 } \right] }{ dt } \) = k₁[N₂O₅], \(\frac { d\left[ { NO }_{ 2 } \right] }{ dt } \)= k₂[N₂O₅] and \(\frac { d{ O }_{ 2 } }{ dt } \) = k ₃[N₂O₅], the relation between k₁, k₂ and k₃ is _____.

(a)

2k₁ = 4k₂ = k₃

(b)

k₁ = k₂ = k₃

(c)

2k₁ = k₂ = 4k₃

(d)

2k₁ = k₂ = k₃

A+B \(\longrightarrow \) C; ∆H = 60 kJ mol^-1 Ea_f = 150 kJ. What is the activation energy of the backward reaction?

(a)

210 kJ

(b)

105 kJ

(c)

90 kJ

(d)

145 kJ

Which of the following statement is not correct?

(a)

Molecularity of a reaction cannot be fractional

(b)

Molecularity of a reaction cannot be more than three

(c)

Molecularity of a reaction can be zero

(d)

Molecularity is assigned for each elementary step of mechanism.

What is the decreasing order of strength of bases
OH, NH₂^- H - C ≡ C and CH₃ - CH₂^-

(a)

OH^->NH₂^- >H-C≡C >CH₃^-CH₂^-

(b)

NH₂^->OH^->CH₃^-CH₂^- >H-C≡C

(c)

CH₃^-CH₂^->NH₂^->H-C≡C^->OH^-

(d)

OH^->H-C ≡ C^->CH₃^-CH₂^- >NH₂^-

Equal volumes of three acid solutions of pH 1,2 and 3 are mixed in a vessel. What will be the H⁺ ion concentration in the mixture?

(a)

3.7 × 10^-2

(b)

10^-6

(c)

0.111

(d)

none of these

Henderson equation for a weak acid and its salt is _______.

(a)

pH = pK_b+ log (Salt) / (Acid)

(b)

pH = pK_a + log (Salt) / (Acid)

(c)

pH = pK_a + log (Salt) / (Base)

(d)

pH = pK_a + log (Acid) / (Salt)

The degree of hydrolysis of 0.1 M solution of ammonium acetate is 8.48 x 10^-5. The dissociation constant of the weak base is _______.

(a)

1.39 x 10^-4

(b)

1.39 x 10^-5

(c)

1.45 x 10^-10

(d)

1.45 x 10^-9

A drop of hydrochloric acid is added to pure water, its pH _____.

(a)

increases

(b)

decreases

(c)

increases and then decreases

(d)

resist the change in pH and so remains unaltered

The number of electrons that have a total charge of 9650 coulombs is_______.

(a)

6.22 ×10²³

(b)

6.022 ×10²⁴

(c)

6.022 ×10²²

(d)

6.022 ×10⁻³⁴

Electrolyte	KCl	KNO3	HCl	NaOAC	NaCl
Λ- (Scm2 mol-1)	149.9	145.0	426.2	91.0	126.5

Calculate Λ^o_HoAC using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25^oC_______.

(a)

517.2

(b)

552.7

(c)

390.7

(d)

217.5

Ohm's law is mathematically expressed as ______.

(a)

I = \(\frac{V}{R}\)

(b)

I = \(\frac{R}{V}\)

(c)

V = \(\frac{I}{R}\)

(d)

R = \(\frac{I}{V}\)

1 F equals to _____.

(a)

96500 moles

(b)

96500 C

(c)

1.6 x 10^-19 C

(d)

1.6 x 10^-19 moles

SHE is _______.

(a)

Standard Helium Electorde

(b)

Standard Hydrogen Electrode

(c)

Standard Mercury Electrode

(d)

none of these

Hair cream is _____.

(a)

gel

(b)

emulsion

(c)

solid sol

(d)

sol.

Match the following

a	V2O5	i	High density polyethylene
b	Ziegler – Natta	ii	PAN
c	Peroxide	iii	NH3
d	Finely divided Fe	iv	H2SO4

(a)

A	B	C	D
iv	i	ii	iii

(b)

A	B	C	D
i	ii	iv	iii

(c)

A	B	C	D
ii	iii	iv	i

(d)

A	B	C	D
iii	iv	ii	i

Which of the following interface cannot be obtained?

(a)

solid - solid

(b)

solid - liquid

(c)

gas - gas

(d)

liquid -Iiquid

The multilayer adsorption of gases on solids take place in _______.

(a)

physical adsorption

(b)

chemisorption

(c)

sols

(d)

active centres

An example of positively charged colloid is________.

(a)

clay

(b)

starch

(c)

Ag

(d)

haemoglobin

An alcohol (x) gives blue colour in victormayer’s test and 3.7g of X when treated with metallic sodium liberates 560 mL of hydrogen at 273 K and 1 atm pressure what will be the possible structure of X?

(a)

CH₃ CH (OH) CH₂CH₃

(b)

CH₃ – CH (OH) – CH₃

(c)

CH₃ – C (OH) – (CH₃)₂

(d)

CH₃- CH₂ –CH (OH) – CH₂ – CH₃

Isoprophylbenzene on air oxidation in the presence of dilute acid gives ______.

(a)

C₆H₅COOH

(b)

C₆H₅COCH₃

(c)

C₆H₅COC₆H₅

(d)

C₆H₅- OH

Lucas test is used to distinguish 1⁰, 2⁰ and 3⁰ ______.

(a)

amines

(b)

nitro compound

(c)

alcohols

(d)

all the above

In swern method of oxidation of alcohols to aldhedye/ ketones _______ is used as an oxidising agent.

(a)

dimethyl sulfoxide

(b)

pyridimium chloro chromate

(c)

CrO₃ in anhydrousmedium

(d)

Na₂Cr₂O₇ |H⁺

The number of primary alcoholic groups in ethylene glycol is ________.

(a)

0

(b)

1

(c)

2

(d)

3

Reaction of acetone with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is _______.

(a)

Grignard reagent

(b)

Sn / HCl

(c)

hydrazine in presence of slightly acidic solution

(d)

hydrocyanic acid

In which of the following reactions new carbon – carbon bond is not formed?

(a)

Aldol condensation

(b)

Friedel craft reaction

(c)

Kolbe’s reaction

(d)

Wolf kishner reduction

Which of the following acids do not exhibit optical isomerism?

(a)

lactic acid

(b)

tartaric acid

(c)

maleic acid

(d)

both (a) and (b)

From which of the following, tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

(a)

HCHO

(b)

CH₃CHO

(c)

CH₃COCH₃

(d)

CO₂

On Kolbe's electrolysis, formic acid gives _______.

(a)

H₂

(b)

methane

(c)

ethane

(d)

none

What are the various steps involved in the extraction of pure metals from their ores?

Which type of ores can be concentrated by froth floatation method? Give two examples for such ores.

Write the two similarities between calcination and roasting.

Define metallurgy.

Write a short note on anamolous properties of the first element of p-block.

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

What is tetraethoxy silane? How is it obtained?

Name the two important ores of Boron.

What are interhalogen compounds? Give examples.

What is the hybridisation of iodine in IF₇? Give its structure.

How is ammonia prepared in the lab?

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

What are inner transition elements?

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

Give the general electronic configuration of actinoides?

What is Zeigler - Natta catalyst?

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.

What is Co-ordination entity?

What is Co-ordination sphere?

What are primitive unit cells?

A compound forms hexagonal dosed packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

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.

Why is instantaneous rate preferred over average rate?

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 \({ t }_{ \frac { 1 }{ 2 } }\)

The rate of the reaction X + 2y→ product is 4 x 10^-3 mol L^-1S^-1, if [X] = [Y] = 0.2M and rate constant at 400K is 2 x 10^-2s^-1, What is the overall order of the reaction.

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

A lab assistant prepared a solution by adding a calculated quantity of HCl gas 25⁰C to get a solution with [H₃O⁺] = 4\(\times\)10^-5M. Is the solution neutral (or) acidic (or) basic.

When temperature is increased, will ionic product of water increase or decrease? Give reason to justify your answer.

Why is aqueous solution of FeCl₃ acidic?

State Faraday’s Laws of electrolysis

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 dilution of 0.1 M of Na₂SO₄, what will happen to its
(a) Conductance (C)
(b) Conductivity K
(c) Molar conductance \({ \Lambda }_{ m }\)
(d) Equivalent conductance \({ \Lambda }\)

Give examples of primary cells.

What are the two types of emulsion?

A solid catalyst is more effective in its finely divided form - Justify.

Complete the following reaction giving names of products.

How can isopropyl alcohols be converted to t-butyl alcohol?

Mention the industrial use of formaldehyde.

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

Give the uses of zinc.

Explain how the metal oxide is converted into metal using carbon as a reducing agent.

Give one example for each of the following
(i) icosogens
(ii) Tetragens
(iii) pnictogens
(iv) chalcogens

Find out the oxidation state of carbon in each of the following:
(i) CaC₂
(ii) H₂CO₃
(iii) HCN
(iv) CO

Write the reason for the anomalous behaviour of Nitrogen.

Explain the structure of ammonia.

What are interstitial compounds?

Explain why oxidation states of transition elements increases first from Sc to Mn and then decrease?

Give an example for complex of the type [Ma₂b₂c₂] where a, b, c are monodentate ligands and give the possible isomers.

What is stability constant?

Classify the following solids in different categories based on the nature of intermolecular force operating in them: Potassium sulphate, tin, benzene, urea, ammonia, water, zinc sulphide, graphite, rubidium, argon, silicon carbide.

Give the characteristics of first order reaction.

Show that in case of first order reaction, the time required for 99.9% completion is nearly ten times the time required for half completion of the reaction.

Derive an expression for the hydrolysis constant and degree of hydrolysis of salt of strong acid and weak base.

Define buffer Index

Two metals M₁ and M₂ have reduction potential values of -xV and +yV respectively. Which will liberate H₂ and H₂SO₄.

Corrosion of aluminum takes place at a much slower rate than iron. Give reason

Peptising agent is added to convert precipitate into colloidal solution. Explain with an example.

Why does physisorption decrease with increase of temperature?

How is phenol prepared from
i) chloro benzene
ii) isopropyl benzene

Give the IUPAC names of each of the following and classify them as 1°, 2° and 3°
(a) CH₃(CH₂)₃CHOHCH(CH₃)₂
(b) (CH₃)₃C-CH₂OH
(c) \(({ CH }_{ 3 })_{ 2 }\underset { \overset { | }{ { C }_{ 6 }{ H }_{ 5 } } }{ C } -OH\)
(d) \(BrCH_{ 2 }-\underset { \overset { | }{ OH } }{ { CH }_{ 2 } } -CH-C({ CH }_{ 3 })_{ 3 }\)
(e) CH₂=CH-CHOHCH
(f) PhCH₂OH
(g) HOCH₂CH₂CH₂CH₂C₆H₅
(h) (C₂H₅)₃COH

Predict the product when calcium ethanoate and calcium methanoate are dry distilled. Explain the reaction.

Write short note on the following:
(i) The process in which no external reducing agent is used.
(ii) The process which is used for highly electro positive metal.
(iii) Write the equation involved in the thermite process.

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

Why is dioxygen a gas but sulphur a solid?

Why is there a variation of atomic andionic size as we move from Sc to Zn?

What are the salient feature of crystal field theory?

What are molecular solids? Explain the types of molecular solids.

For the reaction 2A + B ⟶ A₂B. The rate = k [A] [B]² with k = 2.0 x 10^-6 mol? L² S^-1. Calculate the initial rate of the reaction, when [A] = 0.1 mol L^-1, [B] = 0.2 mol L^-1. Calculate the rate of reaction after [A] is reduced to 0.06 mol L^-1

Derive Henderson - Hasselbalch equation

To one molar solution of a trivalent metal salt, electrolysis was carried out and 0.667 M was the concentration remaining after electrolysis. Calculate the quantity of electricity passed.

Write the characteristics of catalysts.

Explain the mechanism involved in the intermolecular dehydration of alcohols to give ethers.

Give two tests for aldehydes.