Question # 1

Positively charged particle of an atom is called.

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Electron

Proton

Atom

Neutron

During combustion, a substance reacts with

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Hydrogen

Water

Oxygen

Carbon di oxide

Which of the following is an anion.

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F

Cl

S-2

NH3

Chlorophyll is present in.

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Mesophyll cells

Upper epidermis

Lower epidermis

Endodermis

Formula showing maximum number of electrons in a shell.

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n2

2n2

3n2

4n2

The main function of ......... tissue is to store food in plants.

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Xylem

Stometa

Phloem

Parenchyma

Negatively charged atom or grop of atoms is called.

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Proton

Electron

Anion

Cation

Chemical reaction of oxygen with other substances is called.

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Oxidation

Reduction

Rusting

None of these

Which of the following features is the height of the wave from the rest position or mid line.

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Frequency

Wavelength

Amplitude

Pitch

A pigment in the skin that protcts harmful effects of sunlight.

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Haemoglobin

Melanin

Lysozyme

Lymphocyte

The rise of liquid in the thermomeer is due to.

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Evaporation

Contraction

Expansion

Sublimation

The charge present on atom is

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Positive

Negative

Both a and b

Neutral

Exchange of material in the body tissues and blood takkes place in.

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Aorta

Ventricles

Capillaries

Veins

Blue and ..... lifht is absorbed by chlorophyll.

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Yellow

Orange

Red

White

The quantity of matter in an object is called.

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Weight

Mass

Gravity

Friction

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