Question # 1

Which of the following reactions is employed to produce ozone in the laboratory.

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Exposure of air to UV light

Reaction of F2 with H2O at low temperature

Reaction SO2 with H2O2

Passage of silent electric discharge through oxygen

An explosive

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Nitroglycerine

Trinitrotoluene

Fluorine perchlorate

All above

Metal are generally elements

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Electronegative

Electropositive

Neutral

None of the above

The boiling point of water is unexpectedly high because.

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H2O molecule in linear

Sp3 hydrogen bonding is involved in the formation of water

There is hydrogen bonding and consequent association of H2O molecules.

Oxygen is the first member of the VI group

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

Which of the following species have undistributed octahedral structure.

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SF6

PF6

Si F₆^2-

XeF6

Transition elements, in general, exhibit the following properties, except one, Name that property.

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Variable oxidation state

Natural radioactivity

Tendency to form complexes

Formation of alloys

Aluminum is usually extracted from

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Bauxite

Corundum

Feldepar

Alumite

H-Bond has a preferred bonding direction like

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Ionic bond

Covalent bond

Co ordinate bond

None of these

HCIO evolves Cl2 and O2 when dissolve

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Ca

Ni

Cu

Any of above

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

The structure of SO2

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Linear

Angular

V-shaped

Planner

According to systematic nomenclature which hydrogen compound is sulphane.

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HF

Si H4

SF4

H2S

Which of the following would decompose at lowest temperature.

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MgCO3

SrCO3

BaCO3

CaCO3

Consider the coordination compound K2[Cu(CN)4] A coordinate covalent bond exists between

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K+ and CN-

Cu2+ and CN-

K_ and [Cu(CN)4]2+

C and N in Cn

Aluminum occurs in nature as.

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Native

Combined form

Both native and combined

Free

Calcium cyanamide on treatment with steam under pressure gives NH3 and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

The law of triads is applicable to

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Lithium, beryllium, boron

Fluorine, chlorine, bromine

Chlorine, bromine, iodine

Sodium, potassium, Rubidium

The correct order of ionization energies of alkali metals is.

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Li > Na > K > Rb

Na > K > Rb > Li

Rb > K > Na > Li

Rb > K > Li > Na

Explosive trioxide XeO3 is produced when

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XeOF4 reacts with water

XeOF4 reacts with silica

XeF4 reacts with water

Any of above statements

One of the best fluorinating agent is

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XeF2

XeF4

XeF6

None of above

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