Question # 1

Which hydride is intermediate in nature.

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NaH

BeH2

NH3

HCl

Hydrogen resembles in properties with

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IA, IV A and VII A elements

III A, IV A and V A elements

II A, IV A and VI A elements

II A, III A and VII A elements

Fluorine is in group VII A of periodic table. Its chemistry will most closely resembles that of.

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Argon

Boron

Iodine

Sulphur

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

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2

8

14

18

Who gave the law of Triads in 1829?

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Dobereiner

Mosely

Newland

Mendeleev

Variable valency is generally exhibited by

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Transition elements

Alkali metals

s-block elements

Gaseous elements

Which of the following element has lowest ionization energy

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Beryllium

Boron

Carbon

Oxygen

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

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Carbon

Magnesium

sulphur

Hydrogen

Which element has lowest melting point

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Beryllium

Magnesium

Calcium

Barium

Which of the following are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

Correct order according to atomic size in the following is

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Na > K

Be > Mg

O > N

Cl > F

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

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Be

C

N

O

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 one of the following oxides is amphoteric in nature.

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MgO

Na2O

SO2

ZnO

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

The oxides of metal sare generally

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Acidic

Basic

Neutral

Amphoteric

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