Question # 1

Sodium metal has electrons

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10

11

12

14

How many elecntrons are present in the valence shell of group 1 elements.

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1

2

3

4

How many periods are presnet in the modern periodic table.

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7

8

10

12

-------------acts are reserve energy sources.

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Enzymes

Vitamins

Proteins

Lipids

Number of moels in 29.25 g NaCl is.

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0.50

0.25

0.21

0.75

Which is strongest oxidizing agent.

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Cholorine

Iodine

Fluorine

Bromine

Which element is capable of forming all the three types of bonds, covalent coordinate covalent or ionic.

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Carbon

Silicon

Magnesium

Oxygen

Whcih compound contains both covalent and ionic bonds.

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MgCl₂

PCl5

NH₄Cl

CaO

Whcih of the following atoms obey duplet rule.

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O₂

Cl₂

H₂

Li₂

Which compound formed when SO2 is dissolved in water

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H2SO3

SO3

H2SO

H2S2O7

When new bonds ae formed, the energy is

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Consume

Remain same

Release

None of these

How many covalent bonds does C₂H₂ molecule have.

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Two

Three

Four

Five

Following are state of matter.

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Liquid

Solid

Gas

All of these

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