Question # 1

Benedict solution gives a positive test with

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Glucose

Fructose

Sucrose

Starch

Which one of the following reaction of carboxylic acid is reversible?

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Esterification

Salt formation

Reaction with PCI5

Reaction with SOCI2

Ecology is a science of environment and deals specially with

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stratosphere

biosphere

lithosphere

hydrosphere

Smell of cooking gas during leakage from gas cylinder is detected because of the property of:

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Effusion

Evapotration

Diffusion

Conduction

Choose the correct statements

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SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

The existence of a substance in more than one solid modification is known as

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Isomorphism

Polymorphism

Amorphism

None of these

An element that is not an essential par of proteins is

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O

N

H

S

An excellent source of energy without causing pollution is

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Fossil fuel

Sun

Petroleum

Nuclear reactor

The basic distinction between solids, liquids and gases lies in difference between.

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Strength of the bonds

Size of molecules

space which the molecules occupy

All of above

Water in swimming pools is purified by adding

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Sodium

Chlorine

Phosphorus

Potassium

The respiration process taking place in animals depends upon a difference in:

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vapour pressure

osmotic pressure

partial pressure

atmospheric pressure

Fe⁺³and Mn²⁺are strong paramagnetic because the number of unpaired electrons in each is

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4

5

6

7

The atomic radius increases as we move down a group because

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Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

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

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Tetracarbonylnickel (o)

Tetracabonylnickel

Tetracabonylnickel (II)

Tetracabonylnickel (IV)

A cell in which electric current is produced as a result spontaneous redox reaction is called :

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Dry cell

Electrolytic cell

Galvanic cell

Standard cell

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Aqueous bromine

Dilute HNO₃

Dilute HCI

CH₃COCI

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

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A ketone

An aldehyde

An ether

Water

The process of osmosis was first discovered by

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Nollet

Pfeffer

Traube

Dutrochet

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

Optical activity is possible in

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Oxalic acid

Acetic acid

Tartaric acid

Formic acid

E.D.T.A is

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Mono-dentate

Bi-dentate

Polydentate

Having three lone pairs of electrons

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Pressure change

Temperature change

Concentration change

Catalyst

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