Question # 1

Potassium reacts with excess of oxygen to form

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K2O

K2O2

KO2

K2O3

When steam is passed over red bot coke The product formed is

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Hydrogen and carbon dioxide

Mixture of hydrogen and carbon monoxide

Mixture of hydrogen and oxygen

Heavy hydrogen

The inert gasses AR, Ka, and Xe form solid compounds with certain organic molecules under pressure..

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Halides

Hydrates

Clathrates

All of above

The most stable oxidation state shown by lead is.

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+2 , +4

+2 only

+3 , +4

+4 only

Which of the following ions is smallest in size.

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F-

Cl-

I-

Br-

Formula of orthophosphoric acid.

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H2PO4

H3PO3

H3PO2

H4P2O5

Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called.

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Interstitial compounds

Hydrates

Clathrates

Picrates

The electromagevitiy of the following elements increase in the order

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F > Cl > O > S

S > Cl > O > F

F > O > N > C

C > O > N > F

The maximum oxidation shown by managanese is.

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+2

+7

+4

+5

In diborane (B2H6)

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The structure is similar to that of C2H6

All the atoms are in one plane

The born atoms are linked through hydrogen bridges

There is a direct boron boron bond

Which of the following elements is most electropositive.

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C

N

O

Be

VBT does not edplain

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Absorption spectra

Color of transition metal ion

Heat of formation

All above

The solution of NaOH pH -10.46 contain [OH-]

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2.0 X. 10^-4

4.6 X 10^-4

4.6 X 10^-2

4.6 X 10^-3

Which of the following compounds liberates CO2 on heating.

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Li2CO3

Na2CO3

K2CO3

All liberate CO2 on heating.

Which of the following metals form volatile carboyl with CO below 80^oC

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Cu

Fe

CO

Ni

Arrange the following in order of increasing boiling point.

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CH3OH < CH3Cl < RbCl < CH4

CHOH < CH4 < CH3Cl < RbCl

RbCl < CH3Cl < CH3OH < CH4

CH4 < CH3Cl < CH3OH < RbCl

The first noble gas compound was

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XeO3

XeF4

XeF6

Xe +[PtF6]

Valence bond theory is also called as

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Electron pair theory

Band theory

Electron gas theory

Electron pool theory

Co ordinate compounds are

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Polar

Non polar

Dem polar

None of above

H2SO4 is manufactured by

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The lead chamber process

The contact process

Both A and B

The Ostwald's process

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

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