Question # 1

Which of following is oxidation state of oxygen in peroxides?

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-2

1/2

-1

+2

No of unpaired electrons are maximum in

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V+3

Mn+2

Fe+3

Cr+3

Site of land for landfill is selected based upon.

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topography

location of ground

water table

All of these

When the temperature is raised, the viscosity of the liquid decreases.This is because of

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Decreased volume of the solution

Increase in temperature increases the average kinetic energy of molecules which overcome the attractive force between them

Decreased covalent and hydrogen bond forces

Increased attraction between the moelcules

By the electrolysis of CuCl2 using inert electrodes of platinum which species is deposited at cathode

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H2

O2

Cu

CI

The gases law describe the ______ Behaviour of gases

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Variable

Constant

Uniform

Best

2-propanol on oxidation yield

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Propionaldehyde

Propanone

Propanal

Butanal

Adipic acid and Hexamethylenediammine polymerize to give

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Acrylic resins

Plastic fiber

Nylon-6, 6

None

Glyoxal molecule has?

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two carbonyl groups

One aldehydic and one carbonyl group

Two aldehydic groups

Two carboxyl group

The value of R in term of dm³torr k^-1mol^-1

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62400

62.4

8.313

0.0821

The hydrocarbon with maximum B.P is

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CH4

C6H14

C4H10

C2H6

Which of the following is produced when an aqueous solution of butan-2-ol is refluxed with dil acidified KMnO₄

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Butanol

Butanoic acid

Butanone

Butane

E₁mechanism is generally shown by

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1° - RX

2° - RX

3° - RX

None of these

Phenol is a weak acid. The correct order of acid strength of carboxylic acid, phenol and alcohol is

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Carboxylic acid > phenol > alcohol

Carboxylic acid > alcohol > phenol

Phenol > carboxylic acid > alcohol

Alcohol > phenol > carboxylic acid

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

When nitrogen is 5.6 grams in NO₂. then number of moles of NO₂is

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0.5

0.4

0.04

0.05

Chloroflurocarbon releases a chemical harmful to ozone

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Fluorine

Chlorine

Nitrogen peroxide

Sulphure dioxdie

Which is the polymer that has amide linkage in its structure

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PVC

Poly ethene

Polyester

Nylon

When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:

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Alpha rays.

Negative particles.

Electromagnetic rays.

Positive particles.

0.5 mole of CH₄and 0.5 mole of SO₂gases have equal

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Volume

Mass is gram

Total number of atoms

Number of molecules

The vant Hoff factor (1) accounts for

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Degree of solubilisation of solute

The extent of dissolution of solute

The degree of decomposition of solution

The charge over mass ratio of electron is:

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1.6 x 10^-1 C Kg^-1

9.1 x 10^-31 C Kg^-1

1.7588 x 10¹¹ C Kg^-1

6.62 x 10^-34 C Kg^-1

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