Question # 1

On alkali and alkaline earth metals down the group, there is decreasing trend in

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m.p.

b.p.

Ionization potentiall

All of these

Where lime is not used

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In refining or metals

In paper industry

In glass industry

In the preparation of NaOH

The oxidation number of each element of group ll-A is

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0

+1

+2

-1

Which of the following is the hardest metal among following

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Li

Na

Rb

K

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

White phosphorus is

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A mono atomic gas

P₄, a tetrahedral solid

P₈, a crown

A linear diatomic molecule

The element which has a simple cubic lattice in solid state is

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Se

Te

Po

None of these

Which of the following compound is industrially prepared by the electrolysis of solution of NaCl

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Na₂CO₃

NaHCO3

NaOH

NaOCl

CaC₂on hydrolysis form

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CH₄

C₂H₄

C₂H₂

C₆H₆

Which colour is imparted by sodium

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Yellow

Violet

Red

Crimson

Which of the following oxides is peroxide?

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Na₂O₂

MnO₂

BaO

SO₂

Which of the following sulphates is not soluble in water

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium sulphate

The chemical formula of magnesite is

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MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

In the earth crust sodium is

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2.50%

2.30%

2.40%

3.50%

Which of the element is not alkali metal

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Lithium

Rubidium

Francium

Magnesium

The number of electron that are paired in oxygen molecule are

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16

12

14

7

LiOH ______ soluble than NaOH

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More soluble

Less soluble

Equally soluble

None

Alkaline earth metals are usually

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Reducing agent

Oxidizing agent

Amphoteric

Acidic

Sodium forms largely

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Normal oxides

Per-oxides

Superoxides

None of these

Phosphide ion has the electronic structure similar to that of

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Nitride ion

Fluoride ion

Sodium ion

Chloride ion

What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

Which of the following salt is soluble in water

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CaCO₃

CaSO₄

MgSO₄

BaSO₄

The maximum number of electrons in the outermost shall of s-black elements is

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One

Two

Three

Four

Which of the following compounds is explosive in nature?

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Phosphorus trichloride

Nitrogen trichloride

Hyponitrous acid

Nitrosyl chloride

A compound used as eye wash:

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Borax

Boric acid

Metabolic acid

Pyroboric acid

HNO₂acts as an/a

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Acid

Oxidizing agent

Reducing agent

All the three

The structure of white phosphorus is

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Square planar

Pyramidal

Tetrahedral

Trigonal planer

The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is

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Hypophosphorus acid

Orthophosphorus acid

Pyrophosphorus acid

Metaphosphorus acid

Borax is hydrated:

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Penta

Deca

Hepta

Octa

Orthophosphoric acid is

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Monobasic

Dibasic

Tribasic

Tetrabasic

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ECAT Chemistry Chapter 14 Group IIIA & IVA Elements Online Test MCQs With Answers

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