Question # 1

Polyanion formation is maximum in

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Nitrogen

Oxygen

Sulphur

Boron

The formula of lime stone is

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CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

The structure of white phosphorus is

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Square planar

Pyramidal

Tetrahedral

Trigonal planer

P₂O₅is heated with water to give

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Hypophosphorus acid

Phosphorus acid

Hypophosphorus acid

Orthophosphorus acid

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

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

Gypsum is applied to the soil to provide calcium and

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Oxygen

Nitrogen

Phosphorous

Sulphur

Which shows maximum catenation property?

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S

Se

Te

O

Alkaline earth metals posses two electrons in their outermost

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F-orbital

D-orbital

S-orbital

P-orbital

Which of the element is not an alkaline earth metal

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Beryllium

Strontium

Barium

Caesium

The metal with highest electrical resistance at room temperature is

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Pb

Te

Po

Fe

LiOH ______ soluble than NaOH

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More soluble

Less soluble

Equally soluble

None

Carbonates of alkali metals dissolves freely in water to form

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Acidic solutions

Neutral solution

Alkaline solution

None 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

Corrundam is ore of:

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Li

Be

B

Al

Which of the following salt is soluble in water

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CaCO₃

CaSO₄

MgSO₄

BaSO₄

Which colour is imparted by sodium

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Yellow

Violet

Red

Crimson

A compound used as eye wash:

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Borax

Boric acid

Metabolic acid

Pyroboric acid

Which of the following elements is most metallic?

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P

As

Sb

Bi

Which is an essential constituent of chlorophyll

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Be

Fe

Mg

Ca

What is chrome yellow?

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Pbo

Pb₂O

PbCrO₄

Pb₃O₄

Aluminium oxide is:

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Acidic oxide

Basic oxide

Amphoteric oxided

None of these

Hybridized in carbon is:

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sp

sp²

sp³

d²sp

Commercial common salt becomes slight damp on storing because

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Common salt is hygroscope

Common salt contains some impurity, which is hygroscopic

Salt in efflorescent

Salt is crystalline

The alkaline earth elements have in their s-orbital

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One electron

Two electron

No electron

Three electron

What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

Which of the following is not the reactions of lithium

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Which of the following phosphorus is most reactive?

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Red phosphorus

White phosphorus

Scrlet phosphorus

Violet phosphorous

S-block elements consist of

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Alkali metals

Alkaline earth metals

Alkali and alkaline earth metals

None of these

Which of the following is lighter

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Li

k

Na

Ca

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