Question # 1

Vitamin D1 is chemically known as

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Ergocalciferol

Tocopherol

Aserphthol

Phylloquinone

The total number of bond pairs around sulphur and total number of lone pairs around oxygen atoms in the Lewis structure of sulphate ion are respectively.

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4, 12

8,12

12,4

6 ,12

Which halide of cesium will be highly ionic in nature.

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K+

Ag+

Rb+

Ca+

The main active contaminants of uranium processing are.

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U - 235

U-238

Pu -234

All above

The decrease in electron density at one position accompanied by a corresponding increase at other position is called.

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Inductive effect

Asymmetric effect

Electromeric effect

Resonance effect

Which of the following elements has the highest density.

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Mg

Na

K

Rb

Which of the following methods is the most common method for separation of liquid components from a mixture.

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Dialysis

Solvent extraction

Precipitation

Distillation

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

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Glucose

Starch

Alum

None of these

The mole of photon is knonw as.

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Quantum

Einstein

Energy packet

None of the above

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

Which of the following specie is stronger acid than formic acid, HCOOH, in aqueous solution.

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CH3COOH

NH+4

H2SO-3

H4P2O7

Which of the following trihalides of nitrogen behaves as the weakest base.

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NF3

NCl3

NBr3

NI3

The number of vibrational degree of freedom for CO2 is

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2

3

4

5

Bitumen is used in

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Electric generators

Road surfacing

Coal tar

All of above

Which of the following statement is not correct with respect to hydrolytic cycle.

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It is the major constituent of the lithosphere

it is essential requirement of all the organisms

Water covers about 83% of the earth's surface

Water covers about 73% of the ear5th's surface.

In urea the amount of nitrogen is

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82.0%

46.0%

33.0%

21.0%

Which of the following statement in not correct with respect to inductive effect.

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Bond length decrease with increase in inductive effect.

Inductive effect generates polar character in bonds

Variation in strength of aliphatic acids can be explained

It alone cna explain the basically of triphenylamine

Which of the following substance is most abundant of all components of atmospheric air.

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O2

N2

CO2

A2

Which of the following process is used for the removal of particulates.

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Wet removal by precipitation

Sedimentation

Diffusion and impaction

All above

Which sequence of steps is correct in paper making machine

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Pressing Dyring, Flow spreader Calender stock

Flow spreader, Pressing, Prying Calender sock

Drying ,Pressing , Flow spreader, Calender stock

None of above

Which one of the following elements shows the most stable oxidation state of +1

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AI

Ga

In

TI

Formation of nano particles involves process lime

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Foramtion of metal nuclei on different sizes.

Interaction among the formed particles

Both A and B

No interaction among the nano particles synthesized

When the colourless liquid chlorobenzene is shaken with bromine water, the chlorobenzen becomes a yellow-orange colour. Which of the following is the best interpretation of this.

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An addition compound of chlorobenzene and bromine has been formed.

The chlorine atom has been replaced by a bromine atom

The bromine is mor esoluble in chlorobenzene than in water

A hydrogen atom has been replaced by a bromine atom

Which element out of the following can ehibit a maximum con valency of seven.

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Chlorine

Sulphur

Fluorine

both Cl and F

The addition of HCl in the presence of poroxule does not follow anti Markovnikov's rule because.

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HCl bond is too strong to be broken homolytically

Cl atom is not reative enough to add on to a double bond

Cl combines with H to give back HCl

HCl is a reducing agent.

What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids.

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Alkaline

Alkydes

Alcocide

Ketones

Formula of orthophosphoric acid

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H2PO4

H3PO2

H2P2O5

In terms of the amount of the substance adsorbed per gram of the adsorbent (x/m), and pressure p of the gas, the Freudlich adsorption isotherm is represented as.

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x/m = k/pⁿ

x/m = kpⁿ

p = k (x/m)ⁿ

x/m = (k/p)ⁿ

The co ordination number of atoms in a hexagonal closed packed structure is

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2

6

12

4

Which of the following reaction cannot be used for the synthesis of a amino acids.

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Gabriel phthalimide

Streckers synthesis

Sorensen synthesis

Schmidt synthesis

Which of the following metal ion cannot be catimated by gravimetric analysis.

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K+

Ca²⁺

Al3+

Zn2+

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