Question # 1

Which of the following mixture of liquids show negative deviation form Raults law

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Ethyl alcohol and ether

HCI and water

Phenol- water

Chlorobenene-bromobenene

The catalyst,. which is used as specialist for cracking, are

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Aluminates

Alumlnosilicates

Aluminium slats

All can be used

Which of the following was discovered first:

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Charge to mass ratio of electrons.

Mass of electrons.

Charge of electrons.

All of above at same time.

Borax is a common mineral of alkali metal sodium. Its formula is

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Na₂B₄O₇

Na₂,B₄O₇. 10H₂O

Na₂B₃O₆. 10H₂O

Na₂B₄O₇- 5H₂O

Which halide among the following is used as methylating agent?

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CH₃l

C₂H₅Cl

C₂H₅Br

C₆H₅Cl

A filtration process could be very time consuming if it were not aided by a gentle suction which is developed:

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If the paper covers the funnel up to its circumstances

If the paper has got small sized pores in

If the stem of funnel is large so that it dips in to filtrate

If the paper fits tightly.

Which of the following enzymes brings about the hydrolysis of fats?

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Urease

Maltase

Zymase

Lypase

Factors affecting denaturation of proteins:

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Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

The ionization potential is lowest for the

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Halogens

Inert gases

Alkaline earth metals

Alkali metals

Amino acids are bifunctional organic compounds what are the two function groups

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Carboxylic acid and alcohol

Alcohol and aldehyde

Carboxylic acids and ketone

Amino group and carboxylic acid

The general formula of saturated alicyclic hydrocarbons is:

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C_nH_n

C_nH_2n

C_nH_2n+2

C_nH_2n-1

The substances which are added to the soil to provide one or more nutrient elements essential for plant growth are called

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Minerals

Hormones

Fertilizers

None of these

Camphor is often used in molecular mass determination because

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It is solvent for organic substances

It is readily available

It has a very high cryoscopic constant

It is volatile

DNA is a polynucleic acid. The monomer is known as a nucleotide. What is not the component of the nucleoptide

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Phosphate group

Deoxy ribose sugar

Uracil base

Adenine base

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

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Two

Three

One

Four

The rate of reaction determined at a given time is called

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Average rate

Instantaneous rate

Specific rate

Overall rate

The organic compounds containing Ph-OH group are called:

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Phenol

aldehyde

Keton

Carboxylic acids

Which of the following is not a sub-atomic particle

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Electron

Proton

Neutron

Deuteron

The alkyl halide is converted into an alcohol by

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Addition

Substitution

Dehydrohalogenation

Elimination

When rate of forward reaction is equal to rate of backward reaction, then the equilibrium established is called

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Chemical equilibrium

Static equilibrium

Dynamic equilibrium

None of these

The example of colligative property is

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Boiling point

Osmosis

Freezing point

Osmotic pressure

A molecule in which sp²hybrid orbitals are used by the central atom in forming covalent bonds in

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He₂

SO₂

PCl₅

N₂

Same amount of electric current is passed through solutions of AgNO₃and HCl. If 1.08 g of silver is obtained in the first case, the amount of hydrogen liberated as S.T.P in the second case is

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112 cm³

22400 cm³

224 cm³

1.008 g

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Addition Elimination

Addition Reduction

Elimination Reduction

Substitution Elimination

Two solutions of NaCl and KCl are prepared separately by dissolving 0.1 M of the solute in water. Which of the following statements is not true for these solution

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KCl solution will have higher boiling point than NaCl solution

Both the solutions have same boiling

KCl and NaCl solution possess same vapour pressure

KCl solution possess same freezing point at NaCl solution

Water is often treated with chlorine to

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Increase oxygen content

Kill germs

Remove hardness

Remove suspended particles

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Aqueous bromine

Dilute HNO₃

Dilute HCI

CH₃COCI

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

Monocarboxylic acids exist as dimer because of

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Dipole-dipole attraction

Hydrogen bonding

Van der Waals forces

Conhesive forces

Which reaction is of condensation or addition elimination reaction?

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Ketol

Aldol

Cannizzaro

All of these

Kolb's method has limited synthetic applications due to

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Expensive catalysis

Slow reaction

Number of side products produced

Salts used are very expensive

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