Question # 1

The potential difference set up at 25 C and 1 atm when clectrode is dipped m Tis one molar ionic sohution is called

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Single electrode potential

electrode potential

Standard electrode potential

Standard hydrogen electrode

About 25% of earth crust mass is made up of element

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Oxygen

Silicon

Aluminium

Aluminates

The pressure of gas at constant temperature in a container of 2dm3 is 10 atm what will be its final pressure if it is connected with 10 dm3 container

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2 atm

1.6 atm

5 atm

I atm

Which is trigonal cyrstal

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BaSO₄. 4H₂O

FeSO₄

NaNO₃

None

one gram of carbohydrate yields energy:

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10kcal

100kcal

4kcal

9kcal

Which is not an amino acid

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Lysine

Gylcine

Alanine

Aniline

Which of the following are characteristics of oxidizing smog?

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It is yellow brownish grey haze

It has unpleasant odour

Its main reactant are nitric oxide & unburnt hydrocarbon

All of the above

If pressure is increased from a 2 atm to 4 atm on a gas then its volume will decrease from:

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3L to 1L

4L to 2L

6L to 4L

8L to 2L

In the body carbohydrates are broken down into:

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glucose

fatty acids

amino acids

nucleic acid

When vapour pressure is equal to atmospheric pressure than it is called

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Evaporation

M.P

B.P

Freezing point

First order of protein structure refers to

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Bending of protein chain

Number and sequence of amino acids

Three dimensional structure of protein

Site of disulfide bonds

Molarity of pure water is :

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33.3

55.5

44.4

66.6

Antibonding MO is formed by

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Addition of atomic orbitals

Substraction of atomic orbitals

Multiplication of atomic orbitals

None of these

Minamata disease is due to pollution of

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Organic waste into drinking water

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

0.1 molar glucose (C₆H₁₂O₆) solution has the % W/N

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1.8%

18%

0.18%

2.8%

Hydrolysis of trichloromethane with aqueous KOH gives

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Potassium formate

Acetylene

Chloral

Methanol

The boiling point of glycerol is more than propanal because of

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Hybridisation

H-bonding

Resonance

All these factors

When acetamide reacts with Br₂and caustic soda, then we get

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Acetic acid

Bromoacetic acid

Methyl amine

Ethylamine

Which of the following alkyl halides is used as a mathylating agent

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CH₂H₅l

CH₃l

C₂H₅Pr

C₂H₅Cl

The wave number of the light emitted by a certain source is 2 x 10⁶m^-1. The wavelength of this light will be

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500 nm

500 m

200 nm

5 x 10⁷m

During electrolysis of KNO₃, H₂is evolved

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Anode

Cathode

Both a and b

None

Copper oxide is dedected by borax bead test with colour:

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Blue

Red

Yellow

Black

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