Question # 1

Which of the following is not an extensive property.

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Work

Entropy

Free energy

Volume

Tetra halides do not undergo hydrolysis

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C

Si

Sn

Pb

Inorganic acids (HCl, HBr, HNO3 etc) have K value.

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< 1

>1

>10

<10

The instrument used for measuring fluorescence is known as.

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Fluorimeter

Potentiometer

Flame photometer

Mass spectrometer

A chromophore is an isolated fractional group which has

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Coloured appearance

Absorption in UV visible region

Only sigma bonds

Absorption in the region

The capacity of normal human eye to see the smallest object is _______ micro meter

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10000

1000

100

10

Most Hazardous metal pollutant of automobile exhaust is.

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Tin

Mercury

Cadmium

Lead

Which one of the following is not correct.

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Ar is used in electric bulbs

Kr is obtained during radioactive decay

Boiling point of H2 is lowest among all noble gases.

Xe forms Xe OF4

Copper is mainly extracted from witch of the following ore

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Sulphide ores

Carbonate ores

Oxides ores

Non sulphide ores

Which of the following is not evoked in quantum theory?

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Schrodinger wave equation

The rigid rotor approximation

The particle in a box

Boltzmann distribution

Which of the following compounds has fishing ordure

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ammonia

Organic sulphides

Amines

H2S

A system which can exchange energy as well as natter with its surrounding is said to be a/an

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Closed system

Inert system

Open system

All of above

In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is.

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8

16

12

20

Copper is resistant to

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Air

Water

Acid and Alkali

All of the above

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

Which of the following is not a chemical pollutant.

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Solid waste

Noiso

Insecticides

Liquid waste

Which of the following technique is used to separate substance of high molecular weight of different charges.

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Dialysis

Electrophoresis

Solvent

None of the abvoe

Metallic magnesium is obtained by

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Reduction of MgO with Coke

Electrolysis of an aqueous solution of MgCl2

Electrolysis of molten MgCl2

Displacement of magnesium by iron form MgCl2 solution.

An electron has types of motion

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Spin motion

Orbital motion

Both A and B

None of above

Shows a regular increase on moving down the group form carbon to lead

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Atomic volume

Atomic radius

Density

All above

Which of the following is not a biodegradable polymer.

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Protein

PVC

Cellulose

Nucleic acid

All cycle engines working reversibly between same temperature of source and sink have the same efficiency This is the statement for the.

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Carnot cycle

Carnot theorem

Narnst theorem

Second law of thermodynamics

The different layers in graphite are held together by

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Ionic bonding

Metallic bonding

Covalent bonding

Van der Waals forces

Ionization potential of carbon is.

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11.2

7.8

8.1

7.3

Which of the following elements has the highest value of second ionization energy.

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Lithum

Beryllium

Boron

Magnesium

Cyclic polymers of ethylene glycol formed by condensation are called.

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Crown ether

Brown ether

Cryptates

Both A and C

Consider to violet colored compund.[Cr(OH)2)6 Cl3 and the yellow compound. [Cr(NH3)6]C;2 which of the following statements is false.

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Both chromium metal ions are paramagnetic with 3 unpaired electrons.

[Cr(NH3)6)3+ is calculated directly form the energy of yellow light

For [Cr(OH)2)6]3+ is less than for [Cr(NH3)6]3+

The two complexes absorb their complementary colors.

The quantum yield of a Photo chemical reaction in

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Always less than unity

Always equal to unity

Always greater than unity

Can have any value > 0 depending on the reaction

For quality control of Portland cement, the test essentially done is.

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Setting time

Soundness

Tensile strength

All

The composition of mixture of clay and lime stone in the raw for cement material is.

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75% lime stone and 25% clay

25% lime stone and 75% clay

15% lime stone and 55% clay

30% limes stone and 79% clay

Inter halogens are of types.

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3

4

5

6

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