Question # 1

Any property which depends upon the T.P and V is said to be

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Property due to k.E.

Property due to PE

Both a and b

Thermodynamic state

Which of the hydrogen halides has the highest percentage of ionic character

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HCl

HBr

HF

HI

Which one of the following substances is used to decolourizing agent

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Abestos

Animal charcoal

conc. H2SO4

Silica gel

Quality of fuel is judged from its octane number. The best fuels are

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Straight chain hydrocarbons

Branched chain hydrocarbons

Cyclic compounds

Compounds containing benzene ring

In which of these processes are smell organic molecules made into macromolecules?

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethane

The hydrolysis of proteins

Which bond shows maximum hydrogen bonding with water?

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CH₃OH

C₂H₅OH

CH₃----O----CH₃

C₆H₅OH

Refrectrometric method is used when

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Reactions involving absorption of I.R. or U. V

Reactions involving change of refractive index

Reactions involving ions

Change of optical activity

Which is a good nucleophile?

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F^-1

Cl^-1

Be^-1

I^-1

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

Dehydration of an alcohol at 180°

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Alkene

Ether

Ester

An hydride

The correct order of reactivity of halogens with alkanes is

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l₂> Br₂> Cl₂> F₂

l₂> Cl₂> F₂> Br₂

F₂> Cl₂> l₂> Br₂

F₂> Cl₂> Br₂> l₂

Formic Acid is obtained from Red out by:

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Distillation

Crystallization

Filtration

sublimation

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

Which of the following isoelectronic ions has the lowest ionization energy?

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K⁺

Ca²⁺

Cl^-

S^2-

NaH is

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Ionic hydride

Complex hydride

Covalent hydride

Interstitial hydride

Eletronegativity difference in C-C bond in alkanes is:

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Zero

Double

Half

4.0

Which step is unnecessary for purification of water for drinking purposes

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Aeration

Coagulation

Treatment with chlorine

Treatment with iodine

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Step 1 Step 2

HCI HCN

HcN,NaCH H₂SO₄

H₂SO₄ K₂Cr₂O₇/H₂SO₄

KCN HCI

If 18 g glucose (C₆H₁₂C₆) is present in 1000 g of an aqueous of glucose it is said to be

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1 molal

1.1 molal

0.5 molal

0.1 molal

A white precipitate ofsilver chlorideimmediately formed on additionof :

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Silver nitrate solution to sodium chloride solution.

Silver chloride solution to sodium nitrate solution.

Silver nitrate solution to potassium chloride solution

Silver nitrate solution to hydrogen chloride solution.

Covalent compound s mostly exist in the form of:

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Protons

Atoms

Neutrons

Molecules

Water is often treated with chlorine to

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Increase oxygen content

Kill germs

Remove hardness

Remove suspended particles

The most distinctive character among the elements is their division into

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Metals and non-metals

Solids, liquids and gases

Atoms and molecules

Active and inactive elements

The rate equation for a reaction is Rate =k[A]. what are unit of K ?

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Mole-1 dm³ S^-1

Mole dm³ S^-1

Moledm³

S^-1

Estimation of Na in sea water is an example of :

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Numerical analysis.

Qualitative analysis.

Quantitative analysis.

None of above.

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Identify the hydrocarbon formed, when ethyl bromide reacts with, alcoholic KOH at 100°

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Methane

Ethane

Ethene

Ethyne

Which of the following synthetic phosphorous fertilizers is marked as super phosphate

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Calcium dihydrogen phosphate

Appetite

Calcium phosphate

Wavellite

In purification of potable water the coagulant used is

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Nickle sulpahte

Copper sulpahte

Barium sulpahte

Alum

All are ortho & Para directing except

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X

OH

NR₃

NH₂

The charge over mass ratio of electron is:

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1.6 x 10^-1 C Kg^-1

9.1 x 10^-31 C Kg^-1

1.7588 x 10¹¹ C Kg^-1

6.62 x 10^-34 C Kg^-1

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