Question # 1

Insoluble ferric oxide is produced in the pH range:

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1 to 8

6 to 9

3 to 13

8 to 13

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

State of hybridization of carbon in the carbocation is

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sp3

sp

sp2

dsp2

Which one of the following is not a form of chemical bonding?

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covalent bonding

hydrogen bonding

ionic bonding

metallic bonding

Water in swimming pools is purified by adding

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Sodium

Chlorine

Phosphorus

Potassium

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

The maximum oxidation state of Mn is

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+6

+7

+5

+4

Which of the following is soluble in water?

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СН3ОН

CCL4

CHCI3

CS2

Compound X & Y give effervesce with Na2CO3, solution. X gives a white ppt with ammonical AgNO3 while Y gives sweet smell compound on heating with alcohol X &Y are

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Formic acid & acetic acid

Acetone & formic acid

Acetaldehy de & acetic acid

Acetic acid & acetone

What s the boling point of H2O at the peak of Mount Everest?

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101 C°

69°C

100 C°

98° C

Cellulose is formed from

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D-galactose units

50% of D-glucose and 50% of L-glucose units

L-glucose units

D-glucose units

Vinegar is dilute solution of:

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Acitic acid

Formic acid

Butyric acid

Propionic acid

Macromolecules are

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organic molecules

High molecular mass molecules

Natural compounds

Rarely occurring molecules

Cyclohexane can be converted not benzene in the presence of

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Pt at 100°C

Pt at 250°C

Pd at room temperature

Pt at room temperature

The rate of E₁reaction depends upon:

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The concentration of substrate

The concentration of nucleophile

The concentration of substrate as well as nucleophile

None of these

Boric acid cannot be used:

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An antiseptic in medicine

For washing eyes

In soda bottles

For enamels and glazes

Orbitals having same energy are called

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Hybrid orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

Solvent extraction is an unstable, Process and it is called by:

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The amount of solute

Distribution law

The amount of solvent used

Law of mass action

What will be the molarity of solution if 103 g (NH₄)₂SO₄is dissolved per 600 cm³of water

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2.32 M

3.32 M

4.32 M

1.30 M

Which of the following elements is not stable:

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Xe

Ar.

Kr.

Li.

Polymer formation from monomers starts by

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Condensation reaction between monomers

Coordination reaction between monomers

Conversion of monomer to monomer ions by protons

Hydrolysis of monomers

Inn which of these processes are small organic molecules made into macromolecules?

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The cracking of petroleum fractions

The fractional distilation of crude oil

the polymerization of ethane

The hydrolysis of proteins

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