Question # 1

What is the pressure of 2 mole of NH₃ at 27°C when its volume is 5 lit.in Van der Waals equation?(a = 0,17,b = 0.03711)

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10.33 atm

9.333 atm

9.74 atm

9.2 atm

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

Equal masses of methane and oxygen are mixed in an empty container at 25∘C.

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1/3

8/9

1/9

16/17

pi-bond can be formed by sideways overlap of

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s-orbital

d-orbital

p-orbital

sp orbital

Beryllium differs from other elements of group Il-A due to

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high charge density

comparatively high nuclear charge

small radius

all above

Water soluble and cyrstalline carbohydrrates are:

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monosacharides

obiligoseacharides

polysacharides

a and b

In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains

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Double

Same

Half

Four times

Which one is not postulated in the kinetci molecular theory among the following?

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molecules are in chaotic motion

molecules of all the gases have same size and same mass

the volume of the molecules is negligible

all molecular collisions are elastic

Poly hydroxyl compounds of aldehyde and ketones are?

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Carbohydrates

Proteins

Fats

Lipids

Which is the following is true about galvanic cell:

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Reduction occurs at cathode

Reduction occurs at anode

Anode is negatively charged

Chathode is positively charged

The three dimensional folding and twisting of a polypeptide chain give rise to

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Primary structure

Secondary structure

Tertiary Structure

All of these tertiary

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

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10,000

20,000

100,000

50,000

Which of the following oxides is unlikely to dissolve in aqueous hydroxide

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Al₂O₃

MgO

SO₂

SIO₂

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

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Rose

Sun flower

Papyrus

Water Hyacinth

During the manufacturing process of cement the temperature of the decomposition zone goes up:

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600°C

8000°C

1000°C

1200°C

If the radius of first Bohr orbit be a_o, then the radius of third Bohr orbit would be

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3 x a_o

6 x a_o

9 x a_o

1/2 x a_o

Which of the following charge

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Li

Be

H

He

Absolute alcohol is obtained by adding rectified apirit in alcohol:

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Water

Na₂CO₃

NaOH

CaO

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84.84 %

89.89%

81.81%

90.90%

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

Ozone layer of stratosphere requires protection from indiscriminate use of

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Fungicides, insecticides, bactericides and medicines

Aerosols and high flying jets

Atomic explosions and industrial wastes

Baloons and turbo-prop aeroplanes

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

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Environment

Hydrosphere

Pollutant

Biosphere

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