Question # 1

Which of the following represents peptide linkage

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-C=N-

-CO-NH-

-CH₂-NH-

-CH-NH-

Which of the following liquid has highest bolling point

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HCI

HBr

H2O

Br2

The rate of diffusion of a gas is:

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Inversely proportional to its density.

Inversely proportional to square root of its molecules mass.

Directly proportional to molecular mass.

Directly proportional to its density.

In the body, carbohydrates are broken down into

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Glucose

Fatty acids

Amino acids

Nucleic acid

Paramagnetic behaviour is caused by the presence of

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Unpaired electrons

Paired electrons

Paired protons

Paired electrons in an atom. molecule or ion

In s solution 7.8 g of benzene ( C6H6 ) and 46g of toluene (C6H5CH3) is present. The mole fraction of toluene is

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1/3

1/5

2/3

5/6

Reaction of alcohol with hydrogen chloride, in the presence of Zinc chloride yields

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Ketone

Carboxylic

Alkyl halide

Ester

which of the following d blocks element can showthe highest oxidation number is its ompound

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Chromium

iron

Copper

Manganese

The emf produced by galvanic cell is called

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Cell potential

Oxidation potential

Redox potential

Reduction potential

Which of the following metal does not liberate hydrogen on reaction with acid?

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Mg

Pt

Zn

Ca

Which is not a steroid

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Cholesterol

Ergosterol

Phospholipids

None of these

The compounds or species in search of electrons are called

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Elctrophiles

Nucleophile

Nitrities

Bases

Corrundam is ore of:

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Li

Be

B

Al

The four quantum numbers of the valency electron of potassium are

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4,1,1,1/2

4,0,0,1/2

4,1,0,1/2

4,4,0,1/2

With increases in temperature of 10 K of the reacting gases the rate of reaction is doubled because

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Increase in number of collisions

Number of molecules having energy more than Ea is doubled

Increase in order of reaction

Increase in surface area

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

The largest item which is recycled is

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Newspaper

Plastic

Aluminium

Oil

Solvent extraction is an unstable,Process and it is controlled by:

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Alcohol extraction

Petrol extraction

Phenol extraction

Ether extraction

The number of unpaired electrons in Fe³⁺(Z = 26) are

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5

6

3

4

High purity copper metal is obtained by

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Carbon reduction

Hydrogen reduction

Electrolytic reduction

Thermite reduction

The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of

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Rault law

Henry law

Dalton law

Grahms law

Which of the following is used as anesthetics

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Alcohol

Diethylether

Phenol

Dimethyl ether

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