Question # 1

In a saturated solution of AgCl, the molar concentration of Ag+ and Cl- is 1.0x10(-5)M each. What is the value of Ksp

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1.0x10(-5)

1.0x10(-15)

0.1x10(-5)

1.0x10(-10)

Water in swimming pools is purified by adding

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Sodium

Chlorine

Phosphorus

Potassium

Hydrosphere includes

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Seas and rivers

Ocean & polar ice caps

Ground water

All of above

The reaction between Cu and conc. H2SO4 produces

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Cu+2

SO₂

SO₃

H₂

The polymers which can be re-softened again and again are called

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Thermoplastic

Thermosetting

Both a and b

None

The boiling point of radon (211k)id higher than boiling point of helium (4.4k). This is due to the reason that:

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the atomic mass Rn is larger than that of He

the dispersion forces between Rn atoms are more prominent than between he atoms

rn atomic number of Rn is larger than that of He

The enthalpy change for the reaction C2H2 + 5/2 O2 --------> 2CO2 + H2O is known as enthalpy of

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Fomation of CO2

Fusion ofC2H4

Combustion of C2H4

Vaporization of C2H2

The value of Kc for H2O at 25C° is

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1x10 (-14)mole dm-3

14 mol dm-3

1.86×10(-16) mol dm-3

1.0x10 (-7)moldm-3

Increased concentration of enzyme alkaline phosphatase is a sign of

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hemophilia

heart disease

thrombosis

rickets

The weakest intermolecular forces present in a liquid may be

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Dipole-induced dipole forces

dipole-dipole forces

instantaneous forces

electrostatic forces between ions in a ionic solid

Which one of the following groups is indicated when HCI is formed by reaction of ethanol with phosphorous pentachloride?

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Amino group

Halide group

Hydroxyl group

Hydride group

Which reagent is used to reduce a carboxylic group to an alcohol?

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H2/Ni

H2/Pt

NaBH4

LiAIH4

Enthalpy of neutralization of all the strong acids and strong bases has the same value because

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Neutralization leads to the formation of salt and water

Strong acids and bases are ionic substances

Acid always give rise to H⁺ions and bases always furnish OH^-ions

The net chemical change involve the combination of H⁺and OH^-ions to form water

The sample being analyzed is called:

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Electrolyte

Residue

Undue

Filtrate

Oxidation number of oxygen in OF₂is

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+1

-1

+2

-2

The third line of the Balmer series, in the emission spectrum of the hydrogen atom,is due to the transition from the

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Fourth Bohr orbit to the first Bohr orbit

Fifth Bohr orbit to the second Bohr orbit

Sixth Bohr orbit to the third Bohr orbit

Seventh Bohr orbit to the third Bohr orbit

Hybridization of each carbon atom in benzene ring is

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sp hybridized

sp²hybridized

sp³

dsp²

1, 3-Dibromopropane reacts with metallic zinc to form

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Propene

Propane

Cyclopropane

Hexane

Which one is the major reason for pollution in high cities?

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Fossil fuel

Acid rain

Heat dispersion

None of the above

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

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Aldol condensation

Reimer Tiemann reaction

Cannizaaor's reaction

Wolf-kishner reduction

If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required

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0.5

1.0

1.5

2.0

Which of the following is a not typical transition element

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Cr

Mn

Zn

Fe

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