Which one of the following reaction represents calcinations?

(a)

\(2Zn+{ O }_{ 2 }\rightarrow 2ZnO\)

(b)

\(2ZnS+3O_{ 2 }\rightarrow 2ZnO+2SO_{ 2 }\)

(c)

\(MgCO_{ 3 }\rightarrow MgO+CO_{ 2 }\)

(d)

Both (a) and (c)

In the Ellingham diagram, for the formation of carbon monoxide________.

(a)

\(\left( \cfrac { \Delta { S }^{ 0 } }{ \Delta T } \right) \) is negative

(b)

\(\left( \cfrac { \Delta { G }^{ 0 } }{ \Delta T } \right) \) is positive

(c)

\(\left( \cfrac { \Delta { G }^{ 0 } }{ \Delta T } \right) \) is negative

(d)

initially \(\left( \cfrac { \Delta T }{ \Delta { G }^{ 0 } } \right) \) is positive, after 700^oC,\(\left( \cfrac { \Delta { G }^{ 0 } }{ \Delta T } \right) \) is negative

Malachite has______ composition.

(a)

2CuCO₃.Cu(OH)₂

(b)

CuCO₃.Cu(OH)₂

(c)

Cu₂O

(d)

Cu₂S

Magnetic separation it is based on the difference in the_________ of the ore and the impurities.

(a)

magnetic properties

(b)

chemical properties

(c)

physical properties

(d)

melting point

The element that does not show catenation among the following p-block elements is ________.

(a)

Carbon

(b)

silicon

(c)

Lead

(d)

germanium

The stability of +1 oxidation state increases in the sequence ________.

(a)

Al < Ga < In < Tl

(b)

Tl < In < Ga < Al

(c)

In < Tl < Ga < Al

(d)

Ga< In < Al < Tl

Which one of the following compounds has similar structure to that of graphite?

(a)

Boron nitride

(b)

Boron Carbide

(c)

Aluminium Carbide

(d)

Aluminium Oxide

Borax is _______.

(a)

Na₂[B₄O₅(OH)₄).8H₂O

(b)

Na₂[B₄O₅(OH)₆).7H₂O

(c)

Na₂[B₄O₃(OH)₈].6H₂O

(d)

Na₂[B₄O₂(OH)₁₀).5H₂O

In the brown ring test, brown colour of the ring is due to _______.

(a)

a mixture of No and NO₂

(b)

Nitroso ferrous sulphate

(c)

Ferrous nitrate

(d)

Ferric nitra

Which of the following is strongest acid among all?

(a)

HI

(b)

HF

(c)

HBr

(d)

HCl

Catenation property of group 15 elements, follow the order _______.

(a)

N < P < As < Sb < Bi

(b)

P >> N > As > Sb > Bi

(c)

P < N < As < Sb < Bi

(d)

N>> P > As > Sb > Bi

Which reaction is not feasible.

(a)

\({ 2H }_{ 2 }O+{ 2F }_{ 2 }\longrightarrow 4HF+{ O }_{ 2 }\)

(b)

\(2 \mathrm{KBr}+\mathrm{I}_{2} \longrightarrow 2 \mathrm{KI}+\mathrm{Br}_{2}\)

(c)

\(2KBr+{ Cl }_{ 2 }\longrightarrow 2KCl+{ Br }_{ 2 }\)

(d)

\(2 \mathrm{KI}+\mathrm{Br}_{2} \longrightarrow 2 \mathrm{KBr}+\mathrm{I}_{2}\)

Which of the following does not give oxygen on heating?

(a)

K₂Cr₂O₇

(b)

(NH₄)₂Cr₂O₇

(c)

KClO₃

(d)

Zn(ClO₃)₂

MnO₄^- react with Br^- in alkaline P^H to give ________.

(a)

BrO₃^- MnO₂

(b)

Br₂, MnO₄^2-

(c)

Br₂, MnO₂

(d)

BrO^-, MnO₄^2-

The reaction of aqueous KMnO₄ with H₂O₂ in acidic condition gives_______.

(a)

Mn⁴⁺ and MnO₂

(b)

Mn⁴⁺ and O₂

(c)

Mn²⁺ and O₂

(d)

Mn²⁺ and O₃

Sometimes vessels made of copper or bronze show traces of green colour. This is due to the formation of _________.

(a)

Cu(OH)₂

(b)

CuCO₃

(c)

Cu(OH)₂CuCO₃

(d)

Cu(OH)₂CuSO₄

A complex has a molecular formula MSO₄Cl.6H₂O. The aqueous solution of it gives white precipitate with Barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution. If the secondary valence of the metal is six, which one of the following correctly represents the complex?

(a)

[M(H₂O)₄Cl]SO₄.2H₂O

(b)

[M(H₂O)₆]SO₄

(c)

[M(H₂O)₅Cl]SO₄.H₂O

(d)

[M(H₂O)₃Cl]SO₄.3H₂O

Choose the correct statement.

(a)

Square planar complexes are more stable than octahedral complexes

(b)

The spin only magnetic moment of [Cu(Cl)₄]^2- is BM and it has square planar structure.

(c)

Crystal field splitting energy \(\left( { \Delta }_{ 0 } \right) \) [FeF₆]^4- is higher than the \((\Delta _{ 0 })\) of [Fe(CN)₆]^4- 

(d)

crystal field stabilization energy of [V(H₂O)₆]²⁺ is higher than the crystal field stabilization of [Ti(H₂O)₆]²⁺

The hypothetical complex triamminediaqua chloridocobalt (III)chloride can be represented as _______.

(a)

[Co(NH₃)₃(H₂O)₂Cl]Cl₂

(b)

[Co(NH)₃(H₂O)Cl₃]

(c)

[Co(NH₂)₃(H₂O)₂Cl]

(d)

[Co(NH₃)₃(H₂O)₃]Cl₃

According to IUPAC, No is _________.

(a)

nitro

(b)

nitrosyl

(c)

nitrato

(d)

nitrito

Graphite and diamond are ________.

(a)

Covalent and molecular crystals

(b)

ionic and covalent crystals

(c)

both covalent crystals

(d)

both molecular crystals

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 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

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

For a first order reaction A ⟶ product with initial concentration x mol L^-1, has a half life period of 2.5 hours. For the same reaction with initial concentration \(\left( \frac { x }{ 2 } \right) \) mol L^-1 the half life is

(a)

(2.5 x 2) hours

(b)

\(\left( \frac { 2.5 }{ 2 } \right) \) hours

(c)

2.5 hours

(d)

Without knowing the rate constant, t_1/2 cannot be determined from the given data

The rate constant of a reaction is 5.8 x 10^-2  S^{​​​​​​-1} The order of the reaction is ______.

(a)

First order

(b)

zero order

(c)

Second order

(d)

Third order

Concentration is expressed in?

(a)

\(\frac { number\ of\ moles/litre }{ time\ in\ sec } \)

(b)

\(\frac { time\ in\ sec }{ number\ of\ moles/litre } \)

(c)

\(\frac { number\ of\ moles/litre }{ volume } \)

(d)

\(\frac { volume }{ number\ of\ moles/litre } \)

For the second order reaction \({ t }_{ \frac { 1 }{ 2 } }\alpha \)  _____.

(a)

\(\frac { 1 }{ { a }^{ 2 } } \)

(b)

\(\frac { 1 }{ { a } } \)

(c)

Constant

(d)

a

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

Which of the following can act as Lowery – Bronsted acid well as base?

(a)

HCl

(b)

SO₄²⁻

(c)

HPO₄²⁻

(d)

Br^-

When 10^-6 mole of a monobasic strong acid is dissolved in one litre of solvent, the pH of the solution is _______.

(a)

6

(b)

7

(c)

less than 6

(d)

more than 7

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

The button cell used is watches function as follows
Zn (s) + Ag₂O (s) + H₂O (l) ⇌ 2Ag (s) + Zn²⁺ (aq) + 2OH^-(aq) the half cell potentials are Ag₂O (s) + H₂O (l) + 2e^- → 2Ag (s) + 2OH^- (aq) E^o = 34V and Zn (s) → Zn²⁺ (aq) + 2e⁻ E⁰ = 0.76V . The cell potential will be_______.

(a)

0.84V

(b)

1.34V

(c)

1.10V

(d)

0.42V

Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because _______.

(a)

Zinc is lighter than iron

(b)

Zinc has lower melting point than iron

(c)

Zinc has lower negative electrode potential than iron

(d)

Zinc has higher negative electrode potential than iron

Which among the following has same equivalent and molar conductance?

(a)

H₂SO₄

(b)

CH₃COOH

(c)

NaCI

(d)

Na₂SO₄

In the cell representation (+) represents ______.

(a)

salt bridge

(b)

phase boundary

(c)

cathode

(d)

anode

Fog is colloidal solution of _______.

(a)

solid in gas

(b)

gas in gas

(c)

liquid in gas

(d)

gas in liquid

The most effective electrolyte for the coagulation of As₂S₃Sol is _______.

(a)

NaCl

(b)

Ba(NO₃)₂

(c)

K₃[Fe(CN)₆]

(d)

Al₂(SO₄)₃

The phenomenon of scattering of light by the sol particles is called _______.

(a)

tyndall effect

(b)

electrophoresis

(c)

cataphoresis

(d)

dialysis

An example of Gel is_______.

(a)

sharing cream

(b)

paints

(c)

butter

(d)

whippedcream

Which of the following compounds on reaction with methyl magnesium bromide will give tertiary alcohol.

(a)

benzaldehyde

(b)

propanoic acid

(c)

methyl propanoate

(d)

acetaldehyde

On reacting with neutral ferric chloride, phenol gives  ______.

(a)

red colour

(b)

violet colour

(c)

dark green colour

(d)

no colouration.

p-Nitrophenol is having lower pK_a value than phenol because ______.

(a)

phenol is more acidic than p-nitro phenol

(b)

anion of p-nitro phenol is more stabilised by resonance than that of phenol.

(c)

degree of ionisation of p-nitro phenol is less than that of phenol

(d)

anion of p-nitro phenol is less stable than that of phenol.

CH₃CH₂OH \(\underset { (O) }{ \longrightarrow } \) CH₃CHO  \(\underset { (O) }{ \longrightarrow } \) CH₃COOH To stop the oxidation reaction at the aldehyde stage, ______ is used as an oxidising agent.

(a)

KMnO₄ | H⁺

(b)

K₂Cr₂O₇ | H⁺

(c)

pyridinium chloro chromate

(d)

both (a) and (b)

Ethanoic acid \(\overset { P/{ Br }_{ 2 } }{ \longrightarrow } \) 2-bromoethanoic acid. This reaction is called _______.

(a)

Finkelstein reaction

(b)

Haloform reaction

(c)

Hell – Volhard – Zelinsky reaction

(d)

none of these

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

(a)

Tollens reagent

(b)

Fehling’s solution

(c)

2,4 – dinitrophenyl hydrazine

(d)

semicarbazide

Isopropyl alcohol vapours with air over silver catalyst at 520 K give _______.

(a)

tertbutyl alcohol

(b)

acetaldehyde

(c)

acetone

(d)

2-propanol

Oxidation of secondary alcohol gives _______.

(a)

aldehydes

(b)

ketones

(c)

ethers

(d)

primary alcohols

 _______.

(a)

H₃PO₂ and H₂O

(b)

H⁺/H₂O

(c)

HgSO₄/H₂SO₄

(d)

Cu₂Cl₂

Which of the following amines does not undergo acetylation?

(a)

t – butylamine

(b)

ethylamine

(c)

diethylamine

(d)

triethylamine

Which of the following will not undergo Hoffman's bromamide reaction?

(a)

Ethanamide

(b)

Propanamide

(c)

Methanamide

(d)

Phenyl methanamide

Use of chloropicrin is as ____________

(a)

explosive

(b)

dye

(c)

anaesthetic

(d)

sterilizing agent

Complete hydrolysis of cellulose gives ______.

(a)

L-Glucose

(b)

D-Fructose

(c)

D-Ribose

(d)

D-Glucose

Which of the following statement is correct?

(a)

Ovalbumin is a simple food reserve in egg-white

(b)

Blood proteins thrombin and fibrinogen are involved in blood clotting

(c)

Denaturation makes protein more active

(d)

Insulin maintains the sugar level of in the human body

A mixture of D (+) glucose and D (-) fructose is known as__________.

(a)

cane sugar

(b)

sweetless sugar

(c)

invert sugar

(d)

starch sugar

Hereditary traits are carried by__________

(a)

nucleic acid

(b)

protein

(c)

lipid

(d)

carbohydrate

Assertion: 2-methyl-1,3-butadiene is the monomer of natural rubber
Reason: Natural rubber is formed through anionic addition polymerisation.
Codes:
a) If both assertion and reason are true and reason is the correct explanation of assertion.
b) if 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)

If both assertion and reason are true and reason is the correct explanation of assertion

(b)

if 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

The polymer used in making blankets (artificial wool) is _______.

(a)

polystyrene

(b)

PAN

(c)

polyester

(d)

polythene

Sucrose esters are used as _________

(a)

emulsifiers

(b)

preservatives

(c)

food colours

(d)

antioxidants

Phenacetin is _______

(a)

antipyretic

(b)

analgesic

(c)

antibiotic

(d)

antiseptic