Question # 1

Green house gases is

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Carbon di oxide

Methane

Oxides of nitrogen

All these

A force of 1800 N is acting on the surface area of 0.06 m2. The pressure exerted by he force will be.

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3 kPa

30 KPa

300 kPa

3000 kPa

An atom containing two electrons.

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Be

Li

H

He

In man, every somatic cell has chromosomes.

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23

46

16

20

Law of conservation of mass put forward in.

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1783

1784

1785

1786

For making bioplastic, we used corn starch and glyceroal with amount.

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1.4 g and 0.5 g

1.5 g and 0.4 g

1.5 g and 0.5 g

0.5 g and 0.6 g

Symbol and formulae of the reactants are written on....... side fo arrow.

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Left

Right

Upward

Both side

The phenomenon which doe snot lead to global warming.

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Green hous effect

Ozone depletion

Deforestation

Photosynthesis

Speed of light through glass is about.

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300000 km /s

250000 km/s

225000 km /s

200000 km/s

In humna body spinal nerves have pairs.

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12

13

31

32

A metal

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C

Ne

Cu

C

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