Question # 1

Which is the softtest metal.

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Zn

Ca

Na

Al

Period nuber of ²⁷ Al ₁₃ is

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1

2

3

4

When we move form left to right in a period, atomic number

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Decreases

Increases

First increases then decreases

None of the above

Platinum alloyed with which metal is used as catalyst in automobiles as atalytic covertor.

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Gold

Rhodium

Palladium

Both a and b

Which one of the following halongesn has lowest electronetivity

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Iodine

Chlorine

Fluorine

Bromine

Actinide series starts after the element

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Actinium

Lanthanum

Osmum

Silver

All transition elements belong to

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s and p block

d- block

f-block

d and f block

When we mvoe from left to right in a period, ionization energy.

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No effect

Decreases

Increases

None of these

The horizontal lines present in the priodic table are called.

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Groups

Periods

Both a and b

None of these

17th group elements ae known as

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Alkaki metals

Alkaline earth metals

Noble gases

Halogens

When we mvoe top to bottom in group, ionization energy.

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Increases

No effet

Decreases

None of these

A yellow solid element exists in allotropic forms whic is also present in fossil fuel. Indicate the name

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Iodine

Carbon

Sulphur

Aluminium

Electronegativity of oxygen is.

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3,1

3,3

3.4

3,2

The amoutn of energy given out when an electron is added to an eatom is called.

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Electron affinity

Lattice energy

Ionization energy

Electronegativity

Which halogen memebr exists in a liquid stte at room temperature

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Bromine

Chlorine

Fluroine

Iodine

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