Question # 1

Which of the following oxides is amphoteric..

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CaO

BaO

BeO

MgO

Fluorine finds considerble use of DDFT which is used as.

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herbicide

Fungacide

Insecticide

Nomatocides

What is the following is incorrect.

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Water is more polar than H2S

H2O2 is a planar molecule

Heavy water is produced by the exhauative electrolysis of water made acidic

H2O2 act both as oxidising as well as reducing agent in acidic medium

The current voltage characteristics forms the basis of.

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Thermal analysis

Potentiometry

Polarography

Colorimetry

An example of acrylic monoterpenoid is

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Dipentene

Myocene

a- terpineol

Limonene

Which of the following is a thermometric method.

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TGA

DTA

DTG

All

Pi bond is formed

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By the overlapping of atomic orbitals on internuclear axis

By transference of electrons

By sidewise overlapping to half filled p orbitals

By overlapping of s-orbitals with p orbitals

What is the ratio of stress to strain in a material loaded within its elastic ranger.

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Poisson’s ratio

Refractive index

Modulus of elasticity

None of above

BCl3 is an example of hybridization

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sp

sp2

sp3

None of above

Soap is soluble in grease because it

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Is non polar

Has a hydrophobic head

Has a hydrophobic tail

Has an ionic head and a hydrocarbon tail

Which of the following is not a biodegradable polymer.

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Protein

PVC

Cellulose

Nucleic acid

The noble gas which was discovered first in the sun and then on the earth is.

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Helium

Neon

Argon

Xenon

Which of the following salt is colourless.

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Zn salt

Co salt

Ni salt

Mn salt

Which property is not exhibited by carbon in its compounds.

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Forming bounds to other carbon atoms

Formation multiple forms

Exhibiting allotropic forms

Forming compounds with coordination number beyond four

Which of the following elements has the highest ionization energy.

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Na

Si

Ar

Cl

Which of the following statement is not true is case of catalytic reforming.

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Dehydrogenations high endothermic

Dehydrogenation is exothermic

Hydrodealkylation reactions are endothermic

None of these

In DTA , theriac effect may be exothermic of endothermic These are cause by

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Fusion

Crystal structure inversion

Destruction of crystal lattice

All of above

Cement containing higher percentage of gypsum than required.

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Sets slowly

Sets repidly

_{Does not set at all}

Has no effect

Which of the following salt is water insoluble.

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K2SO4

Na2SO4

BaSO4

None of abvoe

Which of the following statement is not correct with respect to electrometric effect.

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It is permanent effect

It is brought into play instantaneously at the demand of attacking reagent

It proceeds a polar addition reaction

The original electronic condition is restored after the removal of tacking regent.

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

Which of the following is most soluble in water.

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BaSO4

Sr SO4

CaSO4

MgSO4

In the metallurgy of iron, when limestone is added to the blast furnace, the calcium ion ends up in.

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Slag

Gangue

Metallic calcium

Calcium carbonate

The lowest K.E. for an electron is three dime national cubic box is given by

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h²/ 8m^a

3h² / 8 ma²

9h²/ 8ma²

16h² / 8ma²

Carbon dioxide content in atmosphere is

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0.0034%

0.034 %

0.34 %

3.4 %

Which statement is false.

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If a reaction is thermodynamically spontaneous it may occur rapidly

If a reaction is thermodynamically spontaneous it may occur slowly.

Activation energy is a kinetic quantity rather than a thermodynamic quantity.

If a reaction is thermodynamics spontaneous, it must have a low activation energy.

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

The orientation of a crystalline surface is confidently defined in terms of.

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Lijima Indices

Miller indices

Clausen indices

None

Which of the following biogeochemical cycle is not component of ecosystem.

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Carbon cycle

Potassium cycle

Oxygen cycle

Nitrogen cycle

Group IV A consist of elements.

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3

4

5

6

Xe reacts directly with

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O2

Cl2

F2

Br2

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