Question # 1

Energy of atom in compound is

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Higher than individual atom

Lower than individual atom

equal to individual atom

Impossible to predict

Primary structure of proteins refers to

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Coiling and folding in form of specific structure

Number of amino acids in a chain

3d structure

Alpha and Beta sheets

A certain buffer solution contains equal cone. of X- and HX. Ka for HX is 10(-8). The pH of buffer is

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3

11

8

14

Choose the correct statement:

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SO₂ affects the nucleus

SO₂ affects plasmodesmate

SO₂ affects cell wall

SO₂ affects all membrane systems

The kinetic energy of three moles of gas is:

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3/2 RT

3 RT

1/2 RT

2 RT

Which one of the following molecules show maximum hydrogen bonding?

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H₂O

H₂Se

H₂S

HF

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

When equal proportion of DH3_ l and C2H5 ___ l are treated with Na metal in preasence4 of dry ether, the number of possible hydrocarbons obtained will be:

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5

4

3

2

Which ion is most polarising?

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AI³⁺

Ba²⁺

Mg²⁺

Na⁺

Leachate contains:

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fatty acids

Bacteria

Heavy metals

All of these

One dm³of O₂at STP has mass

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32 g

16 g

4.438 g

1.4383 g

Among the following elements which one has the highest value of first ionization potential?

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Oxygen

Argon

Barium

Cesium

A reaction is reversible because :

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Products are stable.

Reactants are reactive.

Products are reactive.

Reactants re stable.

Gammexane is

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Chlorobenzene

Benzyl chloride

Brommobenzene

Benzene hexachloride

The percentage of nitrogen in ammonium nitrate is

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32 - 33.5%

34 - 36%

40 - 45%

None of these

Alcohols reacts with Grignard reagent to form

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Alkanes

Alkenes

Alkynes

All

Charge on electron was discovered by:

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Millikan.

Crook.

Neil Bohr.

Rutherford.

Which one of the following is a water soluble vitamin

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D

K

A

Ascorbic acid (Vic C)

[Co(NH₃)₆]³⁺will form ______ structure

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Square planar

Tetrahedral

Octahedral

Trigonal bipyamidal

SN₂reaction has order of reaction :

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First

Second

Third

Zero

White P when boiled with strong solution of caustic soda produces

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Phosphine

Posh acid

Phosphorous acid

None

Alcohols are derivatives of:

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Alkanes

Alkens

Alkynes

Benzene

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