Question # 1

Which property of hydrogen not resemble to alkali metals.

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Electronic configuration

Oxidation state

Reaction with halogen

Metallic nature

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

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II A

IV A

V A

VI A

Who gave the law of Triads in 1829?

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Dobereiner

Mosely

Newland

Mendeleev

In modern periodic table VI period contains elements

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8

18

10

32

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

Which hydride is intermediate in nature.

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NaH

BeH2

NH3

HCl

Majority of the elements of the periodic table are.

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Semi metals

Non metals

Metals

Noble metals

Which has greater hydration energy.

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Li+

Na+

K+

Mg+2

The concept of atomic number was introduced by

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Alrazi

Mendeleeve

Moseley

Dobereiner

Which the correct statement

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Cl^-is smaller than Cl atom

Cl^-(Ion) and Cl (atom) are equal in size

Na⁺is smaller than Na atom

Na⁺is larger than Na atom

Which one of the following elements has the largest second ionization energy.

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O

Na

F

Ne

Across a period from left to right in the periodic table, the melting and boiling point.

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Decrease

Increase

Remain constant

First increase upto the middle of period and then decrease

In a period, from left to right in the periodic table, the size of atom generally.

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Increases

decreases

Remains constant

First increase upto the middle of period and then decreases

Number of elements in the first period of the periodic table is

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2

8

14

18

The element of 2nd period, which has highest ionization energy from the following is

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Be

C

N

O

In which group of periodic table is the element which has atomic number 14.

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II

IV

III

VI

Keeping in view size of atoms ,which order is the correct one.

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Mg > Sr

Ba > Mg

Lu > Ce

Cl > I

Which element has lowest melting point

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Beryllium

Magnesium

Calcium

Barium

Which oxide is more basic in nature.

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Beo

MgO

CaO

BaO

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^-

Ionic Hydrides react with water to form

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Proton

Hydride ions

Hydroxide ions

Hydronium ions

Which one of the following elements burns in air to form an oxide which, when shaken with water, give sa solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Which of the following the highest hydration energy

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Li⁺

Na⁺

K⁺

Mg⁺⁺

In which block of periodic table non metals are present.

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s

p

d

f

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