Question # 1

A solution of borax in water is.

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Acidic

Alkaline

Neutral

None of these

Which element burns in nitrogen atmosphere to form nitride.

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Mg

Al

Both a and b

None of these

Group VI-B of transition elements contains

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Zn, Cd, Hg

Fe, Ru, Os

Cr, Mo, W

Mn, Te, Re

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

The crystals of caustic soda, NaOH, are hygroscopic when these crystals are exposed to air.

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Gain water and remains solid

Gain water and becomes liquid

Lose mass and remain solid

Remain unchanged on heating.

Which one of the following does not react with dilute sulphuric acid.

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Mg (OH)2

Mg

MgO

Mg(NO3)2

In ethene molecule how many carbon orbitals are equivalent and degenerate in nature.

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3

4

5

6

Which catalyst is used in contact process

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Fe₂O₃

V₂O₅

SO₃

Ag₂O

Which one does not belong to the alkaline earth metals

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Be

Ba

Ra

Rn

Ranney nickel is prepared by reacting dilute NaOH solution with.

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Nickel

Brass

Nickel and aluminum alloy

Nickel oxide

Acid rain fist of all was observed by

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Augus Smith

Robert Hook

Mosley

Watson

The reaction between concentrated H2SO4 and glucose give carbon and water. In this reaction H2SO4 acts as.

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An acid

An oxidising agent

Dehydrating agent

A reducing agent

As you proceed across a period in the periodic table the first ionization energy

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Decrease

Increase

Remains constant

First increase up the middle of period and then decreases

Which is the strongest acid

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HCIO

HCIO₂

HCIO₃

HCIO₄

Rectified spirit contains alcohol about

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80%

85%

90%

95%

The conversion of potassium magnate to potassium permanganate by passing Cl2 Through aqueous solution of K2MnO4 is called.

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Contact process

Open hearth process

Stadeler's process

Thermite process

Which one the following a dihydric alcohol

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Ethanol

Cyclo hexanol

Glycerol

Glycol

Ethanol on dehydration can be changed to

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Ethene

Diethyl ether

Both 'a' and 'b'

None of these

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