Question # 1

Which of the following has highest M.P

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Aluminium

Silicon

Phosphorus

Sulphur

Which statement is incorrect.

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All the metals are good conductors of electricity

All the metals are good conductor of heat

All the metal form positive ions

All the metal form acidic oxides

Correct order according to atomic size in the following is

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Na > K

Be > Mg

O > N

Cl > F

Which property of hydrogen not resemble to alkali metals.

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Electronic configuration

Oxidation state

Reaction with halogen

Metallic nature

The concept of atomic number was introduced by

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Alrazi

Mendeleeve

Moseley

Dobereiner

Element of which group reacts with hydrogen and form ionic hydrides.

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II A

IV A

V A

VI A

Mark the incorrect statement

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Metallic character increase down the group

Metallic character increase from left to right along a period

Metallic character decrease from left to right along a period

Metallic character remains the same down the group

Which of the following statement is correct

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Na atom is smaller than Na⁺

Na atom is larger than K atom

F atom is smaller than F^-

F atom is larger than F^-

Who gave the law of Triads in 1829?

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Dobereiner

Mosely

Newland

Mendeleev

What criteria did Mendeleev use in arranging his periodic table.

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Atomic mass

Atomic number

Mass number

Density

Which one of the following is a metalloid.

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sulphur

Antimony

Mercury

Zinc

Which element when react with chlorine form polymeric halide.

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Na

Be

Ba

P

Which is the longest periodic table

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4

5

6

7

Which of the following the highest hydration energy

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Li⁺

Na⁺

K⁺

Mg⁺⁺

In which compound, oxidation state of sulphur is +6

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H2S

H2SO4

H2SO3

SO3

In which group, melting point and boiling point increase downward in a group

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IA

II A

VII A

Both a and b

Which has greater hydration energy.

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Li+

Na+

K+

Mg+2

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