Question # 1

Silk is an example of

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animal fiber

vegetable fibre

mineral fibre

none of these

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

Water is purified by:

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Filtration

aeration

coagualation

All of these

A fibre which is made from acrylonitrile as monomer

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PVC

rayon fibre

acrylic fibre

polyester fibre

Albumins and globulins are defined as

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Derived protein

Conjugated protein

Fibrous protein

Globular protein

The heat of reaction depends upon

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Temperature of the reactants

Physical states of the reactants and the products

Both A) and B)

Path of the reaction and the temperature

Macromolecular hypothesis acceptance due to efforts of standinger came about in:

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1910

1920

1930

1940

Which of the following tends to approach ideal gas like behavior at R.T.P

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ammonia

neon

carbon dioxide

chlorine

Alkaline phosphatese is associated with ______ disease

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Heart disease

Rickets

Diabtese

None

In MgCl2, the oxidation state ofCI is

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Zero

-2

+2

-1

The substances which soften the polymer are called

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stabilizers

plasticizers

retarders

pigments

Which one of the following reacts immediately with conc. HCI in the presence of ZnCI₂

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Primary alcohol

Secondary alcohol

Tertiary alcohol

Ether

The value of R (Rydberg's constant) is _______ m-1

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1.0974 x 107

1.0842 x 107

1.082 x 10-7

Both a and b

The electrophile in aromatic sulphonation is

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H₂SO₄

HSO₄

SO₃

SO₃⁺

Which of the following is used as anesthetics

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Alcohol

Diethylether

Phenol

Dimethyl ether

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

Mustard gas is a :

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Gas

Liquid

Solid

High boiling point

Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called

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Stark effect

Zeeman effect

Compton effect

Photoelectric effect

Aldehydes are oxidizes are to give:

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Primary alcohol

Sec-alcohol

Ter-alcohol

Carboxylic acid

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

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Change in internal energy

Enthaply change

Temperature change

Work done by the system

A molecule in which sp²hybrid orbitals are used by the central atom in forming covalent bonds in

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He₂

SO₂

PCl₅

N₂

In which type of following solutions the total volume of solutions may not be necessarily equal to sum of volumes of solute and solvent ?

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Percentage volume/volume

Percentage volume/weight

Percentage weight/volume

Percentage weight/weight

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