Question # 1

-------------------- is/are used to coat the backside of the mirror.

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Silver

Copper

Aluminium

Silver and Aluminium

A bacteria is used in genetic engineering because of their.

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Size

Nucleus

Gene

Fast rate of reproduction

Sodium hydroxide solution in water will

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Turn blue litmus red

Give pink colour with phenolpthalein

Give red colour with methyl orange.

Not affect the phenolphthalein indicator

Which type of image is formed in Plane Mirror.

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Real

Real and virtual

Virtual

None of these

The force acting normally unit area is.

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Strees

Strain

Motion

Pressure

Carbon cycle and ............. cycle are teh processes in whihc these minerals circulate between the organisms and the environment.

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Hydrogen

Iodine

Oxygen

Nitrogen

Which is used in UPS.

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Electric generator

Compressor

Electric motor

Inverter

The formula of find the magnitude of current is.

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I = Q/t

I = QV

I = CV

I = C/Q

An element of the third period is the periodic table.

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Li

He

P

H

The phenomenon which doe snot lead to global warming.

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Green hous effect

Ozone depletion

Deforestation

Photosynthesis

Before mitosis, sets of chromosomes are.

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Two

Three

Four

Five

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