Question # 1

Since the acid gives both acidic and normal salts so the acid is.

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di acid

di basic

double salt

Any of above

Which of the following is soluble in water.

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AgF

AgCl

AgBr

Ag I

The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a.

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Soft base

Hard Base

Soft acid

Hard acid

Greenish yellow gas with pungent irritating odour

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Chlorine

Fluorine

Iodine

Bromine

Argon is used in filling of.

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Discharge tubes

Luminous tube

Fluorescent tubes

None of 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

Setting of plaster of Paris volves.

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Oxidation with atmospheric oxygen

Combination with atmosphere CO2

Dehydration

Hydration to yield another hydrate

Both the elements shows allotropy

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B & Ai

B & Si

Al & Si

Any of above

Electron affinities of halogens are in the order.

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F > Cl > Br > I

Cl > F > Br > I

Cl > Br > I > F

Cl > Br > F > I

The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.

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Neon

Argon

Krypton

Xenon

Highly dangerous acid and produces severe wounds on the skin.

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HCIO

HCIO2

HCIO3

HCIO4

Atomic volume of C, N, O and F are in the order

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C > N > F > O

C > N > O > F

F > O > N >C

N > C > O >F

Number of unpaired electrons in Cu2+ ions are.

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1

2

3

4

The formula of Borax is.

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Na2B4O7 6H2O

Na2B4O7 8H2O

Na2B4O7 10H2O

Na2B4O7 12H2O

Which among the following is a Talse statement.

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SO3 is obtained by the catalytic oxidation of SO2

SO3 has trigonal planar geometry in gaseous state

SO3 in nauseous state has all S-O bonds equivalent

SO3 gas shows more solubility in water than in H2SO4

Sodium reacts with excess of oxygen to form

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Na2O

NaO2

Na2O2

NaO

When two atoms of hydrogen combine to form a molecule of hydrogen gas the energy of the molecule.

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higher than that of the separate atoms

Equal to that of the separate atoms

Lower than that of the separate atoms

Sometimes lower and sometime higher.

Which of the following is not an ore of nickel.

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Pentalandite

Siderite

Garnierite

Nicollite

In which pair of species, the Lewis formula contain same number of Lone pairs and bond pairs but they are not iso electronci.

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O2 B2

SO2, O3

PCl3, BF3

SOCl2, COCl2

In each period the most electro negative element belongs to.

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^{Group -1}

Group -17

Group -2

Group -18

Which isotope of hydrogen is radioactive in nature.

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Protium and deuterium

Tritium only

Tritium and deuterium

Only deuterium

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