Question # 1

The different types of glass are.

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A- glass, C-Glass, E-Glass and S-Glass

A-Glass, B-Glass, E-Glass, S-Glass

AR -Glass, C-Glass, E-Glass and S -Glass

A-B Glass

Among the elements of second period the element with highest melting point belongs to group.

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1

14

17

18

The electronic configuration of chromium (Z =24) in the ground state is.

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[Ar] 4s² , 3d⁴

[Ar] 3d⁶

[Ar]4s¹, 3d⁵

[Ar]

Which of the following process is used for the conversion of matte is to nickel.

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Orford process

Mond's process

Electrolytio process

All

Putrefaction is

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Hydrolysis of proteins

Reduction of proteins

Bacterial oxidation of proteins

All of these

Which of the following element is usually determined by flame photometry.

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Li

Na

K

All above elements

Anhydrous AlCl3 cannot be obtained by heating hydrated AlOI3 ,6h2o Because.

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It decomposes completely to give Al2O3

It does not lose water completely

It undergoes hydrolysis to give Al(OH)3

AlCl3 .6H2O is very stable.

Which of the following cells is used to produce electricity from chemical reaction

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Electroytic cell

Galvanic cell

Voltaic cell

Fuel cell

Both C and D

Who proved that all the six hydrogen atoms in benzen are equivalent.

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Kekule

Ladenburg

Faraday

Wohler

A property which gradually increases on moving down group in the periodic table is

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Ionization enthalpy

Elemtronegativity

Electron affinity

atomic size

Which of the following statements is not correct.

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The conductance of one cm3 of a material is called specific conductance

Specific conductance increase while equivalent conductance decreases on progressive dilution

The limiting equivalent conductance of weak electrolytes cannot be determined by extrapolation of the plot of A against concentration

The conductivity of metals is due to the movement of elctrons.

Which of the following statements is false about enantiomers.

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Rotate plane of polarized light

Are superimposable mirror images

Nbonsuperimposable mirror images

All of the above

The particle would be stationary in a lattice only at.

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273 K

0 K

298 K

373 K

Which of the following carbides reacts with H2O to form propane.

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Al4C3

CaC2

SiC2

Sic

Which idea of envisioned the construction of nano robots

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Building nano materials atom by atom

Destruction of macromolecules to nano ones

Bothe of the above

None of the above

Setting of plaster of Paris volves.

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Oxidation with atmospheric oxygen

Combination with atmosphere CO2

Dehydration

Hydration to yield another hydrate

Group IV A consist of elements.

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3

4

5

6

Which of the following agrochemical acts as pollutant.

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Fertilizers

Weedicides

Herbicides

All above

The expected specific wastes of textile industry is

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Cloth residue

Fibre residue

Dyes

All above

Select an acidic amino acid

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Lysine

Cystine

Aspartic acid

Aminoacetic acid

The photoelectric effect is the ejection pf electrons from the surface of metal when light falls on it. Which of the following statements is not correct about the phenomenon.

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The kinetic energy of photo electron depends upon the frequency of the incident radiation

Electrons are ejected only when the frequency of light exceeds a certain threshold value

The higher the energy of the photon greater the kinetic energy of the ejected electron.

The threshold frequency of all the metals is same.

Beside the common silica based SPE particles, polymer supports are also available They have advantages over silica based SPE particles, Which of the following reason is possible.

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These are stable over a wide pH range.

These do not possesses residual silica groups

These are designed to be wettable and have high capacity than silica base particles.

All above

Which of the following statements is correct.

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A sigma bond is weaker than a pi pond

There are four coordinate bonds in the Lewis structure of NH4+ ion.

The 1 covalent bond is directional in nature

A single bond between the two atoms cannot be re bond.

The correct order of ionic radii for the following ions is.

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S²- < P^3- < Cl- < K+

Cl- > S2+ > P3- > k+

K+ > Cr > S2+ > P3-

P3+ > S2 > Cl - > K+

Strength of H bond in inter mediate between

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Van der Waals forces and covalent bond

Ionic and covalent bond

Ionic and metallic bond

Metallic and covalent

Pick out incorrect statemtn about K2r2O7

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It oxidizes acidified solution of H2S to S

It oxidizes Ki TO i2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

Which of the following pentahalides is not formed.

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NF5

PF5

AsF5

BiF5

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

Arrange the hydrides of group 15 in the correct order of reducing nature.

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NH3 < PH3 < AsH3 < Sb H3 < BiH3

NH3 > PH3 >AsH3 >Sb H3 > BiH3

PH3 < AsH3 < SbH3 < BiH3 < NH3

PH3 > AsH3 > SbH3 > BiH3 > NH3

The sum of pH and pOH is aqueous solution is equal to.

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14

7

zero

pKw

Bitumen is used in

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Electric generators

Road surfacing

Coal tar

All of above

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