Question # 1

A compound with chemicla formula Na₂CX₃ has formula mass 106 ami. Atomicmass of the elemetn X is.

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16

23

12

106

Nitrogen molecule contains.

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Polar covalent bond

Triple Covalent bond

Double covalent bond

Single covalent bond

Which is strongest oxidizing agent.

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Cholorine

Iodine

Fluorine

Bromine

Chlorine has two isotopes, both of which have

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Same mass Number

Same number of electrons

Same number of neurtons

Different number of protons

Pure alkalis metals can be cut siply by knife but iron cannot bccause of alkali meals have

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Non metalic bonding

Strong metallic bonding

Weak metallic bonding

Moderate metqllic bonding

Number of peiod in the periodic table are.

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7

8

5

16

Which are good conductor of heat and electricity

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Metals

Non metals

Metalloids

All of these

Empricial formula of sand is.

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SiO2

SiO3

SiO4

SiO

How many electrons can be accommodated at the msot in the third shell of the elements.

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8

12

10

18

Mark the icorrect statement about ionization energy.

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It is measured in kJmol-1

It is absorption of energy

It decreased in a period

It decrese in a group

How many electrons can be accommodated at the most in the third shell of the elements.

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8

10

18

32

The compund formed by oppoite charges are known as.

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Metallic solids

Ionic compounds

Non-polar Covalent compound

None of the above

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