Question # 1

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

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Glucose

Starch

Alum

None of these

Which of the following substance is colloidal in nature.

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Clay

Al2O3

Fe2O3

All above

The simplest formula of a compound containing 50% of element X

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XY2

XY

X2Y

None of the abvoe

A man has to think of alternate sources of energy due to

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Shortage of vehicles

Shortage of fossil fuels

Construction of house

Running of power plant

Which one of the following woul dmake an S_N2 mechanism more likely

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Bulky substituents near the halogen

A polar solvent

A tertiary carbocation intermediate

A reactive nucleophile

Which of the following alkaline earth metals occurs in radioactive form in nature.

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Ca

Mg

Ra

Ba

The reagent which can react with 1- chlorobutane to give substitution product is

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Al Cl3

KOH -CH3OH

NaCN

Mg/ether

Which of the following species is very good oxidizing agent.

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MnO₄

H+

Zn²⁺

Fe³⁺

Which of the following is a source of energy but does not cause pollution.

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Gaslone

Nuclear power plant

Fossil fuels

Sun

Commercial incinerators produce.

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Smoke

CO

NOx

All above

The yellow colour of chromates changes to orange red on acidification, due to the formation of.

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Cr3+

Cr2O3

Cr2O7^2-

Cro3

Which two atoms of hydrogen combine to form a molecule of hydrogen gas. the energy of the hydrogen molecule is.

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Higher than that of separate H atoms

Equal to that of separate H atoms

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H.

Which of the following is not a general property of amino acids.

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They have high m.p. and b.p

They are soluble in water

Their dipole moments are high

They are amorphous solids

On the basic of CFT the bonding between the metal and ligand is totally

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Ionic

Covalent

Coordinate

Metallic

A molecule returns from the excited singlet state to the ground singled state with emission of light , This process is known as.

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Fluorescene

Scattering

Phosphorescence

Chemiluminescence

In statistical mechanics, there exists a function which contains all the information about a macroscopic system. This function is known as.

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Eigen function

Wave function

Partition function

Distribution function

In proper rotation (Cn) an object is rotated through an angle of.

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a/n radians

2n/n radians

3n/n radians

4n/n radians

Which of the following polymers is chlorinated.

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Orlon

Neoprene

Dacron

None of these

Which one of the following statements is not true.

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Transition metals form alloys

Transition metals form complexes

Zn, Cd and Hg are transition metals

K2[PtCl6] is a well known compound but corresponding nikel compound is not knonwn

When propyne is treated with equeous H2SO4 in the presence of HgSO4 the functional isomer of the major product obtained in.

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Propanal

Acetone

Propane 2 -nl

Propanol

Chlorine is used in

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Sterilizatin of water

Extractionof gold

Bleaching of cotton

All above

Oxides ores of Aluminium

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Corundum

Bauxite

Diaspore

All 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

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 pose threat to historical monument Taj.

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Floods in Yamuna river

Temperature mediated spoilage of marble

Air pollutants from Mathura refinery

Weathering of marble

Iron is said to be abundant in nature. About how many percent of the earth’s crust is iron.

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10%

5%

20%

8%

Copper is resistant to

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Air

Water

Acid and Alkali

All of the above

Which of the following detector is used in HPLC system.

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Differential refractometer detector

UV detector

Diode array detector

All above

Which one of the following is not formed when an electric discharge passes through helium.

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HeH+

HeH2+

He2+

He2-

Which of the following does NOT react with sodium hydroxide solution.

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Fat

Vinegar

Ethanol

Water

The isoelectric point of a protein or amino acid to.

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pH at which it does not have any charge

pH at which it does not have not charge and does not migrate in electric field

pH at which the concentration of cation is greater than amino

pH at which the concentration of anion is greater than cation

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