Question # 1

^{Reaction of ethyl bromide with ammonia}

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Completes in a single step

Completes in two steps

Continues till N is left with no lone pair

is reversible

Which one of the following enzymes brings about the hydrolysis of fats?

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Urease

Maltase

Zymase

Lypase

What will be the ratio of volume of equal masses of O₂, H₂and CH₄kept in same container under same conditions

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2 : 16 : 2

1 : 16 : 2

2 : 16 : 1

1 : 2 : 1

The highest temperature in which a substance can exist as a liquid is called its

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Absolute temperature

Critical temperature

Maximum temperature

Body temperature

The maximum possible number of hydrogen bonds in which a H₂O molecule can participate is:

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1

2

3

4

Coinage metals Cu, Ag and Au are the least reactive because they have

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Negative reduction potential

Negative oxidation potential

Positive reduction potential

Positive oxidation potential

pH value of pepsin is:

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3

2

4

1.4

Most reactive among the following

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Li

Mg

Ca

Na

White marble buildings are effected by?

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O₂

SO₂

CI₂

CFC_s

Hardness of diamond is attributed to the

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strength of the ionic bonds in the structure

three-dimensional network of covalent bonds

absence of valence electrons in carbon atoms

The layer of earth around the earth is called:

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Atmosphere

Hydrosphere

Lithosphere

Biosphere

Standard reduction of Zn = -0.76 V and that of Ni is -0.25 V. On coupling them by a salt bridge which of these will act as anode

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Salt bridge will act as anode

Zn will act as anode

Ni will act as anode

None of these

What is the name of the comlex [Ni(CO)₄]

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Tetracarbonylnickel (o)

Tetracabonylnickel

Tetracabonylnickel (II)

Tetracabonylnickel (IV)

The reaction between fat and NaOH is called:

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Esterification

Hydrogenolysis

Fermentation

Sponification

Which is symmetric alkene?

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CH=C-CH₂

CH≡CH

CH₃-C≡C - CH₃

B and C

Aromatic hydrocarbons are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

The four bonds of carbon in methane are directed towards the corners of

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Cube

Pentagon

Hexagon

Tetrahedron

A pair of elements in the same family in the periodic classification is

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Cl and C

Ca and Al

N and Ne

Na and K

Cellulose does:

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Satisfy human appetite

Stimulates intestinal peristalsis

Gives fibre and bulk to the food

All of these

Drained sewage has B.O.D

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More than that of water

Less than that of water

Equal to that of water

None of the above

Formic acid is given names from Latin word a "formic" which means:

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Red out

Vinegar

butter

Milk

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