Question # 1

The common oxidation state of lanthanides is.

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+3

+2

+1

+4

What is a measure of rigidity?

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Stiffiness

Jardmess

Strength

Modulus of elasticity

CNG is stored under

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Power genertion

Electric Generators

Solvent

All of above

Which of the following is not true of ozone.

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It is a strong electilizing agent

It attacks organic compounds containing carbon carbon double bond

Its molecular is linear and has two different O-O bond lengths

It is more powerful oxidising agent at molecular oxygen

Which of the following statement is not related with the advantages of TLC.

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A variety of adsorbents can be used

The thickness of adsorbent can be varied

Fluorescence can be introduced

Different detectors can be used

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

The pKa of an acid having ionization constant 1 x 10^-5 is

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-5

5

9

-9

Which of the following gas form weakly acidic sulphurous acid

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SO2

SO3

NO2

NO

Noble gases are used in discharge tubes to give different colours. Raddish orange glow is due to.

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Ar

Ne

Xe

Kr

Which of the following statements is false about transition metals.

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They form complexes

They show variable valency

All transition metal compounds are paramagnetic

They form coloured ions

Which substances is not used as an additive in paper industry.

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Glucose

Starch

Alum

None of these

The three isotopes of hydrogen differ from one another in

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Atomic number

Number of protons

Nuclear charge

Nuclear mass

Proteins have characteristics

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Melting poirn t

Iso electric point

Boiling point

All of these

Which of the following test to used to find out whether the observed data differ significantly from the one obtained from theoretical distribution.

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Chi square test

F -Test

Student's test

Coefficient of variance

The number of electrons involved in bonding in Lewis structure of oxalate ion is

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20

14

22

18

The atomic orbitals are progressively filled in order of increasing energy. This statement is called as

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Hund's rule

Aufbau's rule

(n+1) rule

Planck's rule

Which of the following statements is not a part of Bohr's theory of the hydrogen atom.

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An electron in an atom revolves aroung the nucleus only in circular paths.

An electron does not absorb energy in the stationary orbit

An electron does not emit energy in the stationary orbit

Energy is emitted or absorbed in a discrete amount from the stationary orbit

In each period the element with lest electron affinity belongs to.

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Group 1

Group 14

Group 17

Group 18

Which of the following is not a characteristics of solids.

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Definite shape

Definite mass

Definite volume

Fluidity

a-terpioneol is obtained on hydration of which of the following with dilute H2SO4.

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Citral

Myrcene

Linalool

Limonene

According to CFT the metal ligand bond is considered to be ionic to presentage.

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100%

90%

50%

70%

Oil of turpentine contains

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a-pinene

b- pinene

Both A and B

Name of these

Used in producing intense light in cinematography

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Xenon

Krypton

Radon

Helium

The variation of enthalpy of reaction with temperature is given by.

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Hesse's law

Clasisus Clapayron equation

Kirchoffs equation

Arrhenious equation.

What field of study encompasses the procurement and production of metals.

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Metallury

Geology

Metagraphy

Nanochemistry

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 biodegradable pollutant.

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Domestic waste

DDT

Mercury salta

Aluminum foil

Transition elements, in general exhibit the following properties, except one Name that property.

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Variable oxidation state

Natural radioactivity

Tendency to form complexes

Formation of alloys

Ammonia when used directly as a fertilizer is to be injected about_____ under the surface to keep it from seeping out.

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2 inches

4 inches

6 inches

10 inches

Which of the following species have undistributed octahedral structure.

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SF6

PF6

Si F₆^2-

XeF6

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