Question # 1

A mixture of H₂, H2 and CH₄has total number of 0.51 mole and total pressure of 1 atmosphere. If the mass of H₂is 0.8 gram, then its partial pressure is

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0.4 atm

0.6 atm

0.776 atm

0.667 atm

Which of the following is the unit for pressure of a gas in system international

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Nm^-2

mm of Hg

atmosphere

torrr

How much pesticides have been synthesized at present?

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Four thousand

Six thousand

Eight thousand

Ten thousand

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

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Blow air

Add Na₂CO₃

Use a specially made sorbent having fluorine trapped in it

Use a sorbent having Al₂O₃trapped in it

Which of the following does not contribute towards the formation of photochemical smog?

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NO

SO₂

O₃

Hydrocarbons

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

The lattice energy of NaCl is

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787 j/ mole

790 kj/mol

780 kJ/ mol

-787 kI / mole

Which of the following is not a property of enzymes?

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extraordinary speciffcity

reversibility of reactions

high efficiency

minimum activity at optimum T

If a graph is plotted between temperature on x-axis and volume on Y-axis for 1 mole of gas,then we get straight line which cuts the temperature axis at

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-300°C

300 K

-273.15 K

273.15°C

Oxides of sulphur react in atmosphere by various reactions to form:

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sulphates

sulphites

sulphides

sulphate aerosols

Li resembles with Mg, because

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the ratio of their charge to size is nearly the same

both have nearly same size

both are metallic in nature

both are found together in nature

Amino acids are buildng blocks of:

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protein

Carbohydrates

Lipids

fats

In a Galvanic cell

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Chemical energy is converted into electricity

Chemical energy is converted into heat

Electrical energy is converted into heat

Electrical energy is converted into chemical energy

The amount of oxygen in the lithosphere is about

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35.50%

40.60%

56.60%

50.50%

The final product formed by distilling ethyl alcohol with excess of Cl₂and Ca(OH)₂is

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CH₃CHO

CCl₃CHO

CHCl₃

(CH₃)₂O

Which of the following statements is true about Galvanic cell

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Anode is negatively charged

Reduction occurs at anode

Cathode is positively charge

Reduction occurs at cathode

Ammonium nitrate fertilizers is not used for which crop?

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Cotton

Wheat

Sugar-cane

Paddy rice

Content is a combination of mainly:

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Calcarious

Argillaceous

Calcarious and argillaceous

Al₂O₃

Naturally occurring lipids are called

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Fats

protein

Steroids

None

C₆H₁₂O₆ is molecualr formula of:

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Glucose

Dextrose

Fructose

All of these

The heat of formation of graphite and P(white) is ______ KJ/mole

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0.00

-273.0

+8.7

813.99

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

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A ketone

An aldehyde

An ether

Water

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