Question # 1

Which one of the following is heterogeneous mixture?

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milk

ink

milk of magnesia

sugar solution

Graphite is ___________

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Hard

Nil

Soft

Nil

Br2 + H2S __ 2HBr + S, which one is oxidizing agent:

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H2S

Br2

S

2HBr

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

The boiling point of H2O is:

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100

12

1.105

9

10 gram sugar is dissolved in 90 gram of water to make a 100 gram solution.This solution is

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10% m/m

10% m/v

10% v/m

10% v/v

Electrons carry _________ charge.

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+

_

Neutral

Bouble Positive

Carbon forms ____________ bonds in diamonds.

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4

3

6

9

The SI unit of pressure is:

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N

N/m²

Pascal

atm

Atoms are arranged in ________________ structure in Bucky balls.

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Hollow

Cage

A & B

Nil

Which element has highest electronegativity?

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CI

F

Br

I

The cathode of Daniel cell is made up of

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Zn

Cu

AI

C

Which one of the following is an electron deficient molecule?

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HN₃

BF₃

N₂

O₂

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