Which of the following is incorrect with respect to metallurgy of iron in the blast furnace?

(a)

Zone of combustion : \(C+{ O }_{ 2 }\rightarrow { CO }_{ 2 }\)

(b)

Zone of heat absorption : \({ CO }_{ 2 }\rightarrow C+{ O }_{ 2 }\)

(c)

Zone of slag formation : \(CaO+{ SiO }_{ 2 }\rightarrow CaSiO_{ 3 }\)

(d)

Zone of reduction : \({ Fe }_{ 2 }{ O }_{ 3 }3C\rightarrow 3CO+2Fe\)

In the froth-floatation process the collectors such as pine oil and xanthates, etc enhance.

(a)

Non-wettability of the mineral particles in froth.

(b)

Non-wettability of the mineral particles in water

(c)

Non-wettability of the gangue particles in froth

(d)

Non-wettability of the gangue particles in water

\(2PbS+{ 3O }_{ 2 }\longrightarrow 2pbO+{ 2SO }_{ 2 }\) Name the process ________.

(a)

Roasting

(b)

Calcination

(c)

Smelting

(d)

Leaching

Malachite has______ composition.

(a)

2CuCO₃.Cu(OH)₂

(b)

CuCO₃.Cu(OH)₂

(c)

Cu₂O

(d)

Cu₂S

Galena is_______.

(a)

PbS

(b)

ZnS

(c)

Ag₂S

(d)

FeS₂

In graphite electrons are _______.

(a)

localised on each C-atom

(b)

localised on every third C-atom

(c)

delocalised within the layer

(d)

present in anti-bonding orbital

All elements except carbon have the tendency to show maximum covalency of six ______

(a)

due to presence of vacant d-orbitals

(b)

due to absence of vacant d-orbitals

(c)

due to presence of partially filled d-orbitals

(d)

due to presence of completely filled d-orbitals

Which is dibasic?

(a)

Orthophosphoric acid

(b)

Pyrophosphoric acid

(c)

Orthophosphorus acid

(d)

Hypophosphorus acid

Which one of the following orders is not in accordance with the property stated against it?

(a)

F₂ > CI₂ > Br₂ > I₂: Bond dissociation energy

(b)

HI > HBr > HCI > HF: Acidic property in water

(c)

F₂ > Cl₂ > Br₂ > l₂: Oxidising power

(d)

F₂ > Cl₂ > Br₂ > l₂: Electronegativity

Helium is used in balloons in the place of hydrogen because it is________.

(a)

incombustible

(b)

radioactive and detected easily

(c)

lighter than hydrogen

(d)

both (a) and (c)

Oxygen stabilises higher oxidation state because_______.

(a)

it is electronegative

(b)

of its tendency to form multiple bond

(c)

of large size

(d)

of small size

Which of the following is not coloured?

(a)

Mn²⁺

(b)

Zn²⁺

(c)

Cr³⁺

(d)

Cu²⁺

On oxidation with KMnO₄ in acidic medium, SO₂ is oxidised to _______.

(a)

SO₂

(b)

H₂SO₄

(c)

SO₃^2-

(d)

H₂S

If the standard electrode potential (E^o) of a inetal is ________ and __________ the metal is a powerful reducing agent.

(a)

large, negative

(b)

large, positive

(c)

small, negative

(d)

small, positive

Which of the following octahedral complexes do not show geometrical isomerism?

(a)

[Co(NH₃)₃Cl₃]

(b)

[PtCl₂(NH₃)₄]

(c)

[Pt(NH₃)₂Cl₂]

(d)

[Co(en)₃]³⁺

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

The type of isomerism found in the complexes [Co(NO₂)(NH₃)₅]SO₄ and [Co(SO₄)(NH₃)₅] NO₂ _______.

(a)

Hydrate isomerism

(b)

Coordination isomerism

(c)

Linkage isomerism

(d)

Ionisation

The coordination polyhedron of the complex [Cr(H₂O)₆]CI₃ is________.

(a)

square planar

(b)

tetrahedral

(c)

trigonal

(d)

octahedral

The ambidentate ligands are ________.

(a)

SCN^- and NCS

(b)

NO₂^- and ONO

(c)

both (a) and (b)

(d)

None

Magnetic moment is given by the formula _______.

(a)

\(\sqrt { n(n+1) } \)

(b)

\(\sqrt { n(n+2) } \)

(c)

\(\sqrt { (n+2) } \)

(d)

\(\sqrt { { n }^{ 2 }+(n+2) } \)

A solid with formula ABC₃ would probably have, _______.

(a)

A at body centre, B at face centres and C at corners of the cube

(b)

A at corners of cube, B at body centre, C at face centre

(c)

A at corners of hexagon, B at centres of the hexagon and C inside the hexagonal unit cell

(d)

A at corner, B at face centre, C at body centre

Calculate the number of atoms in a cubic unit cell having one atom on each corner and one atom on each body diagonal _______.

(a)

2

(b)

3

(c)

4

(d)

5

The defect arising due to an ion occupying interstitial position is called _______.

(a)

Schottky defect

(b)

Metal excess defect

(c)

Frenkel defect

(d)

Metal deficiency defect

The total number of elements of symmetry in a cubic crystal is________.

(a)

9

(b)

23

(c)

10

(d)

14

The Bragg's equation is _______.

(a)

λ = 2d sinθ

(b)

nd = 2λ sinθ

(c)

2λ = nd sinθ

(d)

nλ = 2d sinθ

Which of the following does not affect the rate of reaction?

(a)

Amount of the reactant taken

(b)

Physical state of the reactant

(c)

∆H of reaction

(d)

Size of vessel

The addition of a catalyst during a chemical reaction alters which of the following quantities?

(a)

Activation energy

(b)

Entropy

(c)

Internal energy

(d)

Enthalpy

Pick out the odd one.

(a)

 ₉₂U²³⁸ ⟶ ₉₀Th²³⁴ + ₂He⁴

(b)

SO₂ Cl₂ ⟶ SO₂ + Cl₂

(c)

CH₃ COOCH₃ + H₂O \(\overset { { H }^{ + } }{ \longrightarrow } \) CH₃ COOH + CH₃ OH

(d)

C₁₂ H₂₂ O₁₁ + H₂O \(\overset { { H }^{ + } }{ \longrightarrow } \) C₆ H₁₂ O₆ + C₆ H₁₂ O₆

CH₃COOCH₃ + H₂ OH \(\overset { { H }^{ + } }{ \longrightarrow } \) CH₃ COOH + CH₃ OH is an example of _______ order reaction.

(a)

first

(b)

zero

(c)

third

(d)

pseudo

For a reaction, E_a = 0 and k = 4.2 x 10⁵ sec^-1 at 300 K, the value of kat 310 K will be _______.

(a)

4.2 x 10⁵ sec^-1

(b)

8.4 x 10⁵ sec^-1

(c)

8.4 x 10⁵ sec^-1

(d)

unpredictable 

Pick the strongest conjugate base among the following

(a)

Cl^-

(b)

\({ NO }_{ 2 }^{ - }\)

(c)

\({ SO }_{ 4 }^{ 2- }\)

(d)

CH₃COO^-

Which among the following has the highest pH?

(a)

1M NH₄ OH

(b)

1M HCI

(c)

1M NaOH

(d)

0.1 M NaOH

 Which among the following is incorrect regarding acids?

(a)

It produces H⁺ ions in aqueous solution

(b)

It can donate a proton to another substance

(c)

It can accept a proton from another substance

(d)

It accepts a pair of electrons

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

If ionic product < solubility product then the solution is ________.

(a)

saturated

(b)

super saturated

(c)

unsaturated

(d)

none of the above

A device in which spontaneous chemical reaction generates electric current ________.

(a)

Galvanic cell

(b)

Voltaic cell

(c)

Daniel cell

(d)

All the above

For the given cell Cr_(s)|Cr³⁺_(aq)||Cu²⁺_(aq)|Cu_(s) which is correct?

(a)

Cr is the anode

(b)

Cu is the anode

(c)

Overall cell reaction is 2Cr³⁺_(aq) +3Cu_(s) ⟶ 2Cr_(s) + 3Cu²⁺_(aq) 

(d)

Cu is the anode and Overall cell reaction is 2Cr³⁺_(aq) +3Cu_(s) ⟶ 2Cr_(s) + 3Cu²⁺_(aq) 

According to Faraday's first law m = ZIt, where Z is ______.

(a)

reaction quotient

(b)

effective nuclear charge

(c)

atomic number

(d)

electrochemical equivalent

The potential of a single electrode is a half cell is called the ______.

(a)

Reduction potential

(b)

Half-wave potential single electrode potential

(c)

Single electrode potential

(d)

Cell potential

What is/are the factor(s) that govern the single electrode potential of a half cell?

(a)

concentration of ions in solution

(b)

tendency to form ions

(c)

temperature

(d)

all of these

Unit of resistivity is ______.

(a)

ohm metre

(b)

siemen

(c)

sm^-1

(d)

mho

The cathode in Leclanche cell is ______.

(a)

Zinc container

(b)

Spongy lead

(c)

Graphite rod in contact with MnO₂

(d)

HgO mixed with graphite

Metals at the top of the electrochemical series are _______.

(a)

strong hydrating agents

(b)

strong dehydrating agents

(c)

strong reducing agents

(d)

strong oxidising agents

The cell potential E_cell is _______.

(a)

E^o_cell = E^o_cathode - E^o_anode

(b)

E^o_cell = E^o_anode - E^o_cathode

(c)

E_cell = E_cell- 0.0591 log K

(d)

E_cell = E_cell - \(\frac{0.0591}{n}\) log k 

Which among the following true regarding adsorption?
(i) Adsorption is a spontaneous process
(ii) Adsorption is always accompanied by increase in free energy.
(iii) Adsorption is an endothermic process
(iv) Adsorption can occur in all interfacial surfaces.

(a)

only (ii)

(b)

(ii) and (iii)

(c)

only (i)

(d)

(i) and (iv)

Auto catalysis is observed in the reaction given below.
CH₃COOC₂H₅+H₂O➝ CH₃COOH+C₂H₅OH

(a)

CH₃COOC₂H₅

(b)

H₂O

(c)

CH₃COOH

(d)

C₂H₅OH

Colloidal solution of ink is prepared by _______.

(a)

mechanical dispersion

(b)

electro dispersion

(c)

ultrasonic dispersion

(d)

peptisation

A colloidal system in which the dispersed phase has very little affinity for the dispersion medium is called _______.

(a)

lyophilic

(b)

lyophobic

(c)

solid

(d)

aerosol

A substance which destroys the activity of a catalyst is_______.

(a)

negative catalyst

(b)

catalytic poison

(c)

both (a) and (b)

(d)

promoter

An example of lyophilic colloid is________.

(a)

sulphur in water

(b)

phosphorus in water

(c)

starch

(d)

all of these

Which among the following reagent is not used to differentiate ethanol and phenol?

(a)

neutral FeCl₃

(b)

C₆H₅N₂CI

(c)

NaOH

(d)

anhy ZnCl₂

Ethyl alcohol cannot be used as a solvent for CH₃MgI because ______.

(a)

CH₃MgI reacts with alcohol giving methane

(b)

the reaction between them is explosive in natrue

(c)

CH₃MgI is converted to C₂H₅MgI

(d)

alcohol is immiscible with CH₃MgI

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

(a)

CH₂ (OH) - CH₂CH₂OH

(b)

HOCH₂ - CH₂OH

(c)

CH₃CH (OH) CH₂OH

(d)

None of these

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

(a)

amines

(b)

nitro compound

(c)

alcohols

(d)

all the above

Compound of molecular formula C₇H₈O is a sweet smeeling liquid. A on reaction with acidified K₂Cr₂O₇ gives compound B of molecular formula C₇H₈O. B reduces Tollen's reagent A and B are respectively.

(a)

benzaldelyde and benzoic acid

(b)

Methyl phenykarbinol and acetophenone

(c)

benzyl alcohol and benzaldehyde

(d)

diphenyl carbinol and benzophenone

The compound that acts as a solvent for Grignard reagent is ______.

(a)

Ethyl alcohol

(b)

Diethyl ether

(c)

Acetone

(d)

Benzene

The common name of this compound CH₂ = CH-CH-OH is ______.

(a)

glycerol

(b)

vinyl alcohol

(c)

allyl alcohol

(d)

prop-2-en-l-ol

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)

Picric acid is _______.

(a)

2,4,6 trinitro toluene

(b)

2,4,6 trinitro benzaldehyde

(c)

2,4,6 trinitro phenol

(d)

2,4,6 trinitro benzoic acid

On oxidation of an alcohol gives an aldehyde having the same number of cabon atoms as that of alcohol is ________. 

(a)

1⁰ alcohol

(b)

2⁰ alcohol

(c)

3⁰ alcohol

(d)

None

The active component of dynamite is _______.

(a)

keiselghur

(b)

nitro glycerine

(c)

nitro benzene

(d)

trinitro toluene

An example of trihydric alcohol is _________.

(a)

trimethyl carbinol

(b)

3-hexanol

(c)

propane-1,2,3-triol

(d)

tert-butylacohol

Phenol turns _______ when air oxidised.

(a)

red

(b)

violet

(c)

blue

(d)

green

Oxidation of glycerol with bismuth nitrate gives ________.

(a)

meso-oxalic acid

(b)

glyceric acid

(c)

tartronic acid

(d)

both (b) and (c)

On heating, peroxides are ________.

(a)

stable

(b)

unstable

(c)

decomposes violently

(d)

both (b) and (c)

Which among the carbonyl compounds cannot be prepared by Rosenmund reduction?

(a)

Ketones

(b)

Formaldehyde

(c)

Acetaldehyde

(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

Which of the following does not give iodoform test?

(a)

aceto phenone

(b)

benzophenone

(c)

\({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CHOH } \)

(d)

\({ CH }_{ 3 }-\underset { \overset { | }{ OH } }{ CH } -{ { CH }_{ 2 }{ CH }_{ 2 }-CH }_{ 3 }\)

Chloretone is an addition product of _______.

(a)

CH₃CHO, HCHP

(b)

CH₃CHO, CHCl₃

(c)

\({ CH }_{ 3 }-\underset { \overset { || }{ O } }{ C } -{ CH }_{ 3 },{ CCl }_{ 4 }\)

(d)

\(\\ { CH }_{ 3 }-\underset { \overset { || }{ O } }{ C } -{ CH }_{ 3 },{ CHCl }_{ 4 }\)

Aldehydes are functional isomers of _______.

(a)

ethers

(b)

alcohols

(c)

ketones

(d)

esters

Which of the following is least acidic.

(a)

C₂H₅OH

(b)

CH₃COOH

(c)

C₆H₅OH

(d)

ClCH₂COOH

Acids have higher boiling points due to _______.

(a)

pleasant smell

(b)

waxy solid

(c)

hydrogen bonding

(d)

- COOH group

The high boiling points of carboxylic acids is due to _______.

(a)

weak Vanderwaal's forces

(b)

intermolecular hydrogen bonding

(c)

intramolecular hydrogen bonding.

(d)

delocalisation of π electrons

Reduction of ketone gives _______.

(a)

Primary alcohol

(b)

Secondary alcohol

(c)

Primary amide

(d)

Secondary amide

Partial reduction of acetic acid in the presence of LiAl H₄ results in the formation of ________.

(a)

ethane

(b)

ethanol

(c)

ethene

(d)

ethyne

The most acidic among the following is ________.

(a)

p- nitrophenol

(b)

p- hydroxybenzoicacid

(c)

o- hydroxy benzoic acid

(d)

p- toluic acid

Aldehydes and ketones are reduced to hydrocarbons by zinc amalgam and cone.HCI. This is__________ reaction.

(a)

Clemmenson's reduction

(b)

Wolff krishner reduction

(c)

Rosenmmunds reduction

(d)

catalytic reduction

Tollen's reagent is ________.

(a)

ammoniacal cuprous chloride

(b)

ammoniacal cuprous oxide

(c)

ammoniacal silver nitrate

(d)

ammoniacal silver chloride

(CH₃)₂ - CH - NO when boiled with HCI/H₂O gives compound 'X'. Identify 'X'.

(a)

CH₃COOH

(b)

(CH₃)₂C = 0

(c)

CH₃CHO

(d)

CH₃NO₂

When nitromethane is reduced with Zn dust + NH₄ CI in neutral medium, we get

(a)

CH₃NH₂

(b)

C₂H₅NH₂

(c)

CH₃NHOH

(d)

C₂H₅COOH

The test for aniline is

(a)

Fehling's test

(b)

Ferric chloride test

(c)

Bromination test

(d)

Riemer Tiemann test

Which among the following is a tertiary amine?

(a)

(CH₃)₃-C-NH₂

(b)

\({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -{ NH }-{ CH }_{ 3 }\)

(c)

(CH₃)₂-N-C₂H₅

(d)

\({ CH }_{ 2 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ { NH }_{ 2 } } }{ C } } -C_{ 2 }{ H }_{ 3 }\)

Oxidation of aniline with acidified K₂Cr₂O₇ gives ___________

(a)

p-benzoquinone

(b)

benzoic acid

(c)

benzaldehyde

(d)

benzyl alcohol

Two amino acids say A, B react to give

(a)

two dipeptides

(b)

three dipeptides

(c)

four dipeptides

(d)

only one

Sugars that yield two to ten monosaccharide molecules on hydrolysis is

(a)

monosaccharides

(b)

disaccharides

(c)

oligosaccharides

(d)

polysaccharides

Glucose + aceticanhydrid \(\overset { pyridine }{ \longrightarrow } ?\)

(a)

di acetate

(b)

tetra acetate

(c)

penta acetate

(d)

hexa acetate

Pyridoxine is__________

(a)

vitamin B₆

(b)

vitamin B₇

(c)

vitamin B₉

(d)

vitamin B₅

Proteins are found to have two different type of secondary structures, a-helix and P pleated sheet structure a-helix structure of protein is stabilised by_________

(a)

peptide bond

(b)

vander Waalsforces

(c)

hydrogenbonds

(d)

dipole - dipole interaction

Which one of the following is employed as antihistamine?

(a)

azithromycin

(b)

ciprofloxacin

(c)

cetirizine

(d)

neomycin

Addition polymerisation is also called as _______ polymerisation.

(a)

chain growth

(b)

condensation

(c)

step growth

(d)

none of the above