Question # 1

Empirical formula of acetic acid (CH3COOH) is

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CHO

CH

CH2O

None of these

Whcih compound contains both covalent and ionic bonds.

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MgCl₂

PCl5

NH₄Cl

CaO

Such reaction which continue in both directins are called.

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Dynamic

Irreversible

Reversible

Non- reactive

According to Arrhenius concept base is a substance which dissociates in aqueios solution to give

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Hydroxide ions

Hydrogen ions

Pair of Electrons

Proton

Building block of all matter is.

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element

Compound

Mixture

Atom

Period nuebr tells abou the

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No. of valance electrons

No. of electronic shells

Both a and b

None of the above

Whcih element is presnet in 2nd period.

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Lithium

Beryllium

Boron

All of these

The word energy is used in physics ofr the firt time.

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1902

1858

1805

1802

How many covalent bonds do N2 molecule have

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3

4

2

5

Which group elements has low ionization energies.

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Halogens

Noble gases

Alkaline Earth Metals

Alkali Metals

The structure of C atom in diamond is.

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Pentagonal

Triangle

Hexahedral

Tetrahedral

Whcih period of the modern periodic table is considered as incomplete period.

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4th

5th

6th

7th

The branch of chemistry that focuses on the study of polymers, their types properties, uses is called.

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Industrial chemistry

Polymer chemistry

Organic chemistry

Astrochemistry

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