Question # 1

The forces present between the ions and water molecules are called:

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dipole-dipole forces

dipole-induced dipole forces

London dispersion forces

ion-dipole forces

The question vapour cause by heating a liquid is due to:

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increase of intermolecular interactions

increase of K.E of molecules

decrease of surface tension

increase in potential energy of molecules

All of the following are simple proteins except

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Histones

Albumin

Keratins

Glycoprotein

The boiling point of radon (211 K) is higher than boiling point of Helium (4.4 K) because

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the atomic number of Rn is larger than that of the He

the atomic mass of Rn is larger than that of He

the dispersion forces between Rn atoms are more prominent that between He atoms

Rn atoms are joined by dipole-dipole force whereas He atoms are joined by hydrogen bonding

SO₂produced by volcanoes is about

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75%

67%

69%

70%

The compound that reacts the slowest in Lucas test

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1-Pentanol

sec-butyl alcohol

3-Pentanol

ter- butyl alcoho

What is clinker?

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Roasted calcareous material

Roasted calcareous & argelarious material

Roasted argillaceous material

Roasted gypsum

Potassium fertilizers are especially useful for:

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Tobacco

Potato

Coffee

All of these

The temperature of in the incineration of industrial and hazardous waste process has range

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

The optimum pH value for the enzyme pepsin is

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10

1.4

8

6

Acetylide can give back ethyne upon treatment with

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water

strong base

dil. Acid

weak base

Product of concentration of ions raised to the power equal to the co-efficient of ions in balanced equation for saturated solution of a salt is called

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Ionic product

Equilibrium constant K_c

K_w

Solubility product (K_sp)

C₆H₁₂O₆ is molecualr formula of:

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Glucose

Dextrose

Fructose

All of these

A nucleophilic reagent will readily Attack

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Ethylene

Ethanal

Ethanol

Ethylamine

NaBH₄and LialH₄are

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Ionic hydrides

Covalent hydrides

Interposal hydrides

Complex hydrides

What is the molarity of H₂SO₄solution that has density of 1.84 gm/cc at 35°C and contains 98% by weight?

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4.18 M

8.14 M

18.4 M

18 M

When CO₂is made to react with ethyl megnesium iodine, followed by hydrolysis, the product formed is:

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Propane

Propanoic acid

Propanal

Propanol

Selection of filter paper depends upon sizes of particles to be :

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Tested.

Filtered.

Checked.

All of above.

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

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H2/Ni

H2/Pt

NaBH4

LiAIH4

Ascorbic acid is a chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B₆

The heat contents of all the elements in their standard states are taken to be

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1

2

0

None

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a:

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Fiber

Plastic

Vanish

Polyamide resin

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