Question # 1

Which of the elements has seven electrons in d-subshell?

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Zn

Co

Cu

Fe

Vegetable oil are

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unsaturated fatty acids

glycerides of unsaturated fatty acids

glycerides of saturated fatty acids

essential oil obtained from plants

Carbon-Carbon double bond length in C3H6

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154 pm

134 pm

120 pm

105 pm

Collagen contains high percentage of

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Glycine

Tryptophan

Phenyl Alanine

Serine

If empirical formula of a compound is CH2 and its molecular mass is 56amu. What will beits molecular formula

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CH2

C3H6

C2H4

C4H8

Simple sugars are:

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Monosaccharides

Disaccharides

Oligo saccharides

Trisaccharides

Carbohydrate that cannot be digested by human digestive system is

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Cellulose

Glycogen

Starch

All of these

According to Boyle's law, which parameters give a straight line parallel to x-axis, when we plot a graph between:

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V and T

P and V

P and 1/V

P and PV

which one of the following statements bout negative ions is incorrect?

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they are also know as anions

they are formed when atoms gain electrons

they are large than the atom from which they were formed

they are smaller than the atom from which they were formed

The vapour pressure of a liquid depends upon

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amount of the liquid

surface area

temperature

size of container

The three dimensional folding and twisting of a polypeptide chain give rise to

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Primary structure

Secondary structure

Tertiary Structure

All of these tertiary

According to Lewis concept ethers behave as:

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Acid

Base

Acid as well as a base

None of them

For which system does the equilibrium constant, KC has units of concentration

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When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as

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Cannizaro reaction

Sabatier-secderens reaction

Alkylation

Kolbe's reaction

What is the shape of Fe(CO)₅molecule?

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Tetrahedral

Octahedral

Trigonal bipyramidal

Square pyramidal

Alcohol fermentation is brought about by the action of

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CO₂

O₂

Invertase

Yeast

The energy of the first electron is helium will be

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-13.6 eV

-54.4 eV

-5.44 eV

zero

Violet colour is obtained when dilute CuSO₄is added in alkaline solution of protein. This test is known as

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Biuret

Xanthoproteic test

Hopkins-cole

All of these

Which is more active ?

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Alkanes

Alkenes

Alkynes

Benzene

Alcohols are derivatives of:

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Alkanes

Alkens

Alkynes

Benzene

Which statement is correct for the fuel cells

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These cells operate at low temperature

No catalyst used for the formation of water

MnO₂is used as electrolyte

Activity of the enzyme is reduced by

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Temperature

Concentration

pH

Inhibitors

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