Question # 1

In peroxides, the oxidation no. of O is

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+1

-1

+3

-3

Carbon forms ____________ bonds in diamonds.

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4

3

6

9

________________ elements were discovered in year 1800.

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34

35

36

37

Scientist used ___________ method.

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Scientific

Non-scientific

Bot

Non

Mass no is represented by :

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A

B

C

D

The mass of one molecule of water is:

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18 amu

18g

18mg

18kg

Salt & water is a _________ mixture.

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Homogeneous

Heterogeneous

It is not mixture

Nil

There are ____________ types of solids.

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1

2

6

4

Energy of a shell is ________________

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Variable

Constant

Cannot be changed

Nil

____________ cell is made of two half of cells.

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Zinc cell

Galvanic

Both

All

Tyndall effect is shown by:

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sugar solution

paints

jelly

chalk solution

Following are elements of 2nd period.Which atom is bigger in size?

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Li

Be

B

C

The other name of modern periodic table is ________________ of periodic table.

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Long form

Simplified

Simplest

Nil

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