Question # 1

Which of the following statements is not correct about galvanic cell?

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Anode is negatively charged

Cathode is positively charged

Reduction occurs at anode

Reduction occurs at cathode

Butane has isomeric forms

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3

4

2

1

Separation of low molecular weight protein from high one is

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Dialysis

Cromotography

Electrophoiesis

Ultracentrifugation

α and β Glucose differs in orientation of hydroxyl group around

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C₁

C₂

C₃

C₄

The conc.of dissolved molecular oxygen in water which act as the most important oxidizing agent ranges from:

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2ppm- 6ppm

4ppm--8ppm

2ppm--- 4ppm

2ppm --3ppm

An ester is prepared by:

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two alcohols

carboxylic acid and alcohol

ketone and alcohol

aldehyde and alcohol

What is the effect of polluted air on environment

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Ozone

Acid rain

Global warming

Smog

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

Which is not mineral of AI?

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Diaspore

Corrundam

Bauxite

Galena

A gas is heated in a closed vessel. Which of the following statement is not true for the gas?

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the intermolecular forces between particles weaken

the kinetic energy of particles increases

the total internal energy of the gas remains constant

the total internal energy of the gas increases

The ratio of volume to temperature on Kelvin scale is constant according to:

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Charle's law

Newton's law

Coulomb's law

Boyle's law

Alkyl halides react with lithium dialkyl copper reagents to give

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Alkenes

Alkyl copper halides

Alkanes

Alkenyl halides

Which among the following elements have lowest value of IE₁?

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Pb

Sn

Si

C

The widely used nitrogen fertilizer that contains about 46% nitrogen is

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Ammonia

Ammonium nitrate

Ammonium sulphate

Urea

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Partial pressure of a solution component is directly proportional to its mole fraction. This statement is known as

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Henry's law

Raoult's law

Distribution law

Ostwald's dilution law

Which of the following is a thermosetting plastic

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PVC

Polyethylene

Polystyrene

Melamines

ph of the buffer CH₃COOh + CH₃COONa is 3.76. If the mixture contains 1 molar acetic acid and 0.1 molar sodium acetate, then pKa of this buffer is

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3.76

4.76

5.76

6.76

5g of glucose is dissolved fro 100 cm of solution. Percentage of solution is :

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5 % v/w

5 % w/v

5 % w/w

Which one of the following in mainly responsible for depletion of ozone layer?

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Methane

Carbon dioxide

Water

chloroflurocarbons

Which of the following is not a fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

When primary amine reacts with chloroform in ethanolic KOH, then the product is

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An isocyanide

An aldehyde

A cyanide

An alcohol

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