Question # 1

S.I units for measurements of pressure

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Pascal

mm of Hg

atm

Torr

Which of the following reactants will be required to form ethene from ethyl chloride

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_{Alcoholic KOH}

Alkaline KMnO4

Aqucous KOH

Aqucous NaOH

The suspended particles in the raw water can be removed by the

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Coagulation

Aeration

Hydration

Dehydration

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

Which of the following is sweetest sugar

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Glucose

Maltose

Fructose

Sucrose

The graph between P onγ-axis and 1/V at x-axis for a given mass of a gas at temperature T is a

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straight line

curved upward

curved downward

circular

Most of the reactions which give stable products are

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Endothermic

Exothermic

Isothermal

Non of these

Ozone in most of the tropical regions acts as a pollutant and cause

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damages to eyes

aggravates asthma

chest discomfort

all of these

The carbon atom of an alkyl group attached with halogen atom is called

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Electrophile

Free redical

Nucleophile

Nucleophilic centre

In which of the following compounds H-binding is not present?

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ethanol

ether

water

ammonia

By the mid of 1980s depletion of total overhead ozone in antarctic region is

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20%

30%

40%

50%

Which is a protein?

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Nylon

Rayon

Natural silk

Terylene

Which of the following react with NaOH to produce an acid and an alcohol?

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NCHO

CH₃COOH

CH₃CH₂COOH

C₆H₅COOH

Which of the following is present in the stings of bees and wasps

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Formic acid

Citric acid

Carbolic acid

Formalin

When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is

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Zero

First

Second

Third

The substance which increases rate of reaction but remains unchanged at the end of reaction is called :

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Catalyst.

Indicator.

Promoter.

Activator.

The paper is derived from the name of which seedy plant?

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Rose

Sun flower

Papyrus

Water Hyacinth

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

If an electrophile attacks then ______ bond breaks first

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C - H

O - H

C - O

None of these

Neutrons was discovered by

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Mosely

Milliken

Chadwick

Ruherford

What is the total number of different chloroethanes, formula C₂H_6-nCl_n, where n can be any integer from 1 to 4

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4

6

7

8

Formic Acid is obtained from Red out by:

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Distillation

Crystallization

Filtration

sublimation

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