Question # 1

The factor responsible for lower mercury level in a capillary tube is

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High density

Surface tension

Liquid state

Metallic Colour

Acetylide can give back ethyne upon treatment with

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water

strong base

dil. Acid

weak base

Which is the example of diffusion of gases

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bubbling in soda bottle

vapour condensing on a moist surface

hot air rising above a candle

spreading of smell from a scent bottle

How many esters are possible for C2H8O2

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3

2

4

5

Which one of the following is not an alicyclic compound?

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Cyclohexene

Cyclohexane

Benzene

Cyclopentane

Gas is enclosed in a container of 20cm3 with the moving piston. According to kinetic theory of gases, what is the effect on freely moving molecules of the gas if temperature is increased from 20°C to 100C.

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Colliding capability of molecule will become lower

Pressure will become one half

Temperature has no effect on freely moving molecules

Volume will be increased

How many grams of NaOH are present in 250 cm3 of its 0.2M solution

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,4 g

, 0.4 g

, 10 g

, 2 g

Total number of valence electrons in phosphonium ion (PH4-) is

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8

9

12

10

Which group activates the benzene ring

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-COOH

-COR

-CHO

-OH

An oil of fat with no double bond have iodine number:

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Zero

100%

50%

Minimum

Collagen is a fibrous protein present most abundantly in

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heart

nucleus

connective tissues

Arteries

Which of the following has highest first ionization potential?

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Carbon

Oxygen

Nitrogen

Boron

Estimation of Na in sea water is an example of :

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Numerical analysis.

Qualitative analysis.

Quantitative analysis.

None of above.

The formula of secondary alcohol is

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R - OH

R - CH₂OH

R₂CHOH

R₃COH

Ammonium nitrate fertilizer is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

One calorie is equal to

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5.184 J

3.184 J

4.184 J

7.184 J

Which has the largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

The rate of which the reaction proceeds is directly proportional to the product of the active masses of the reactants is according to

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Law of mass action

Le Chateliers principle

Equilibrium law

Law of constant proportion

The e.m value for positive rays maximum for:

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Oxygen.

Nitrogen.

Helium.

Hydrogen.

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Zn

H

S

O

Which of the following statements is incorrect about vitamins

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Often function as coenzymes

Molecules contain at least one ring structure

Are often synthesized by the body

Are polyfunctional compounds

In which of the following pairs, the numbers of electrons in the outermost shell are different?

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As,Sb

Ge,Sn

In,pt

Se,Te

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