Question # 1

The condensation between formaldehyde and acetaldehyde in the presence of conc. NaOH and heat gives.

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Acrolein

Mixture of CH3OH and CH3COO Na.

Mixture of CH3CH2OH and HCOO - Na+

None of these

The IUPAC name of C2(CN)3 is

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2,3-dicvano butanedinitrile

2,3 -dicyano -2- butenedinitrile

1,1,2,2-tetrcyanoethane

1,1,2,2, tetracyanocthenc

The unequal sharing of bonded pair of electrons between the two atoms in a molecule causes.

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Dipole

Radical formation

Decomposition of found

Covalent found

Aluminium is used for.

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Making ultensile & framea

Making alloys

Reducing agent

All above

Which of the following statement is not related with direct use of solar energy.

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It is used for space heating of buildings

It can be used to produce electrical power using photovoltaic cells

It can be used to produce hydrogen gas

It can be used start motor vehicle

Which of the following statement is not related with nitric oxide.

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It is a colorless and odourless gas

It is produced largely by fuel combustion

It is a brown pungent gas

It is oxidized to NO2

The hardness of water i s due to the presence of dissolved soluble salts of.

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Calcium

Megnesium

Iron

All above

The size of quantum dot is ________________m

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5

5 x 10^-9

5 x10^-10

5 x10^-11

The rate constant for 3rd order reaction has the dimentions of.

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mol-2 s-1

I2 mol-2 s-1

mol I -1 s-1

I-1 mol -1 s-1

The addition HCl to 2-pentene give

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3-Chloropentane

2- Chloropentyne

2- Chloropentane

2-Chloro-2-methyl butane

The gap between occupied and the unoccupied orbitals is not very large and the conduction of electricity is negligible at lower temperature and appreciable at high temperatures then it will be.

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Good conductor

Non conductor

Semi conductor

None of the above

The most stable oxidation state shown by lead is.

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+2 , +4

+2 only

+3 , +4

+4 only

Which of the following ahs non zero dipole moment.

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NH3

SF6

BF3

CO2

Ammonia is utilized for

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Manufacture of urea

Oxidation to nitric acid

Manufacture of ammonium sulphate

All above

The law of triads is applicable to

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Lithium, beryllium, boron

Fluorine, chlorine, bromine

Chlorine, bromine, iodine

Sodium, potassium, Rubidium

Which of the following solution has highest normality.

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1 N H2PO4

0.5 N H2SO4

6 g NaOH per 100 cm3

4 g NaOH PER 1000 cm3

The electrical resistance of stainless steels can be as much as______ time that of carbon steel.

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5

6

10-

15

Yellow green flame is observed with

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Calcium salt

Barium salt

Strontium salt

Sodium salt

The maximum covalence of an element equal to.

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The number of unpaired d electrons

The number of paired p electrons

The number of unpaired a and P electors

The actual number of a and P electrons in the outermost shell

According to systematic nomenclature which hydrogen compound is sulphane.

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HF

Si H4

SF4

H2S

Sulphur can exist in

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One phase

Two phase

Three phase

Four phase

Enzymatic action is heat at a fixed

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Temparature

pH

Both of these

None of these

An equilibrium the free energy change delta F for a reaction is.

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Maximum

Minimum

Zero

Negative

Bromine number is measure of.

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Paraffins

Unsaturates

Saturates

None of these

Biomass refers to all the organic material derived from

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Photolysis

Photosynthesis

Electrolysis

Oxidation

The binding site on ribosome t-RNA and m-RNA is provided by

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Polysome

Ribosomal RNA

Codone

DNA

In each period, the most electropositive element belongs to group.

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18

17

1

2

What does 'F' stand for in AFM.

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Fine

Front

Force

Flux

Catenation is a process of.

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Formaton of cations

Deposition of cations

Formation of long chain of identical atoms

Formation of covalent bond

What is a process for making glass reinforced shapes that can be general by polling resin impregnated glass stands though a die.

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Continuous pultrusion

Bulk molding

Vacuum bag forming

Computational analysis

When some quantity of electricity is passed though two electrolytic cells. The ratio of the mass of the products obtained at the cathode is the same as the ratio of their

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Densities

Atomic masses

Equivalent masses

Atomic numbers

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