Question # 1

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

The boiling point of H2O is:

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100

12

1.105

9

PCL5 is ________________ shaped.

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Bipyromidal

Angular

Triangular

Linear

Which is a polar molecule?

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HCI

H₂

CI₂

O₂

In ________________ Bohr considered hydrogen atom for his model .

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1913

1916

1917

1918

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

Sodium has ________________ no. of protons.

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11

12

13

14

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

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Long form

Simplified

Simplest

Nil

Which shows Tyndall Effect?

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Slution

Colloid

Suspension

True solution

The bond in covalent compound is ________________

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Covalent

Ionic

Dative

Couple

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

Which one of the following metals burns with a brick red flame?

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Sodium

Magnesium

Iron

Calcium

The shape of H2O is ________________

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Angular

Linear

Triangular

All of above

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