Question # 1

The correct order of ionic radii for the following ions is.

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S²- < P^3- < Cl- < K+

Cl- > S2+ > P3- > k+

K+ > Cr > S2+ > P3-

P3+ > S2 > Cl - > K+

Which of the group 13 element does not form M (III) idodie.

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Al

Ga

Ti

In

Iron which contains up to 1% carbon is called.

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Steel

Cast iron

Wrought iron

Pig iron

Which of the following is not an alkali metal.

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Potassium

Francium

Sodium

Strontium

Which of the following does not apply to metallic bond.

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Overlapping valence orbitals

Mobile valency electron

Delocalized electrons

Highly directed bonds

The configuration of valence shell of certain atom X is 3s2 , 3p5, which valences can it exhibit.

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1,3 only

1,5 only

1,3,5,7

1,3,4

Ca2+ is isolelectronic with.

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Mg2+

Kr

Ar

Na+

The electrolysis of molten metal hydride will produce dihydrogen gas.

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At cathode

At anode

At both the electrodes

At none of the electrodes

Ionic compounds in general possess both

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High melting point and non -directional bonds

High melting points and low boiling poinits

Directional bonds and low boiling points

High solubility in polar and non -polar bonds.

The element having electronic configuration 1s2, 2s2, 3s2, 3p3 is.

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Trivalent only

Tetravalent only

Trivalent and pentavalent

Pentavalent only

Which property is not exhibited by carbon in its compounds.

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Forming bounds to other carbon atoms

Formation multiple forms

Exhibiting allotropic forms

Forming compounds with coordination number beyond four

The attraction which exists between carbon dioxide molecules in solid carbon dioxide is due to.

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Van der Waal's forces

Molecule ion forces

ionic bonds

hydrogen bonds

Which one of the following statements is not true.

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Transition metals form alloys

Transition metals form complexes

Zn, Cd and Hg are transition metals

K2[PtCl6] is a well known compound but corresponding nikel compound is not knonwn

The suffix "ate" at the end of the name of the compiled signifies that it is.

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Cation

Anion

Neutral

None of above

Which of the following is most soluble in water

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CaSO4

Sr SO4

MgSO4

BaSO4

Which of the following metals is the most abundant in the earth's crust.

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Mg

Ca

K

Na

Amorphous boron on burning in air form

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B(OH)3

Only B2O3

Only BN

Mixture of B2O3 and BN

A stable molecule is a group of atoms held together by

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Chemical forces

Physical forces

Valence force

None of above

Phosphoric acid is the most important of the phosphorus oxy acids. Industrially phosphoric acid is prepared by.

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The Ostwald process

The Haber's process

The reaction of phosphate rock with sulphuric acid

The reaction P4O10 with water.

The correct order of second ionization potential of carbon nitrogen, oxygen and fluorine is.

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C > N > O > F

O > F > N > C

O > N > F > C

F > O > N > C

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