Question # 1

Which of the following is not an example of addition polymer?

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Polyethene

Polystyrene

Neoprene

Terylene

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

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Condensation

Electrophilic substitution

Free radical substitution

Nucleophilic substitution

When phenol is reduced in the presence of Zn dust, we get

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Cyclohexene

Cyclohexane

Benzene

Benzyne

Each of the following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

A condensation polymer among the following is

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Dacron

PVC

Polysterene

Teflon

Wohler synthesized first of all the organic compound:

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Carbohydrates

Urea

Aniline

Toluene

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

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Combining with oxygen to form carbon dioxide

Destruction of hemoglobin

Preventing reaction between oxygen and hemoglobin

Forming stable compound with hemoglobin

When 6d orbital is complete, the entering electron goes into:

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7f.

7s.

7p.

7d.

Nylon, 6,6 is a condensation polymer of

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Adipic acid and glycol

Phthalic acid and glycol

Adipic acid and hexaethylene diamine

Pthalic acid and hexaethylene diamine

Ultraviolet radiation from sun causes a reaction that produces

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Fluorides

Carbon monoxide

Sulphur dioxide

Ozone

The equivalent weight of KMnO₄(formula weight = M) when it is used as an oxidant in neutral medium is

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M

M/2

M/3

M/5

UV radiations bring about

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Skin cancer

Mouth cancer

Lung cancer

Liver cancer

Which of the following derivative can not be prepared directly from acetic acid

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Acetamide

Acetyl chloride

Acetic anhydride

Ethyl acetate

S_N1 reaction of alkylhalides leads to

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Retention of configuration

Recemisation

Inversion of configuration

None of these

Which of the following has more unpaired d-electrons?

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Zn⁺

Fe²⁺

Ni³⁺

Cu⁺

What is the nature of SO₂

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Basic

Strongly acidic

Weakly acidic

Amphoteric

A molecule of haemoglobin is made up if nearly

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10,000 atoms

50,000 atoms

2500 atoms

1500 atoms

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

Use of ethanol as:

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Drink

Solvent and fuel

In beverage

All of these

The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to

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1.661 x 10^{-27- Kg}

1.661 x 10^-24Kg

1.661 x 10^{-27- g}

1.661 x 10^-24mg

The electrolysis of CuSO₄aqueous solution using copper as cathode as well an anode the substance which deposits at cathode is

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H₂SO₄

Oxygen

Copper

Hydrogen

If an electrophile attacks then ______ bond breaks first

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C - H

O - H

C - O

None of these

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Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

Which of the following is a molecular diseases?

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Allergy

Cancer

German measles

Sickle cell anemia

The number of atoms present in molecule determines its:

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Molecularity

Atomicity

Basicity

Acidity

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Phenol gives ---------- Colour with neutral FeCl₃solution

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Violet

Green

Red

Blue

Vinyl acetylene combines with HCl to form:

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Polyacetylene

Benzene

Chloroprene

Divinyl acetylene

Partial reduction of acetic acid happens with

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NH₃

LiAIH₄

P + HI

PCI₅

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

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