Question # 1

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

Nil

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

10 gram sugar is dissolved in 90 gram of water to make a 100 gram solution.This solution is

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10% m/m

10% m/v

10% v/m

10% v/v

The lowest energy level is

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K

L

M

N

The property of being polar in nature is called:

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Polarity

Chemistry

Both

Nil

Canal rays are actually

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Electrons

Protons

Neutrons

X-rays

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

Every system in the universe tends to lower its energy to attain ________________

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Freedom

Flow

Stability

Nil

H° - H° has ________________ energy.

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Lower

Higher

Medium

Nil

The forces of attraction present between the molecules of a substance are called ____________ forces.

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Intermolecular forces

Covalent

Ionic

Nil

Identify which one of the following compounds is a ketron?

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(CH₃)₂ CHOH

(CH₃)₂CHCl

(CH₃)₂CO

(CH₃)₂CHCl

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

Which is not a character of SO₂

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it is a colourless gas

It has irritating smell

It causes suffocation

It do not form sulphuric acid

There are ____________ types of salts.

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2

3

6

8

On which bases froth floatation process take place?

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Density bases

Concentration basis

Watting basis

None of these

Which salt cause permanent hardness in water is:

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Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

Building and Monuments lose their beauty and shine due to

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U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

Which one of the following is gas at room temperature:

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C2H6

C6H14

C6H6

C8H18

Forest fires and burning of wood emit.

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CO₂

NO₂

SO₂

Cl₂

Guldberg and waage out forward law of mass action in:

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1889

1879

1869

1859

We exhale gas in the atmosphere during respiration.

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Carbon dioxide

Oxygen

Nitrogen

Water

The wave number of the light emitted by a certain source is 2 x 10⁶ m-1 . The wavelength of this light will be.

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500 nm

5000 nm

200 nm

5 x10⁷ m

To achieve a good separation, the two liquids are gently shaken to increase their area of.

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Miscibility

Separation

contact

Solubility

In the ground state of an atom the electron is present.

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In the nuclsus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

Solvent extraction method is particularly useful technique for separation when the product to be speared is.

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Non volatile or thermally unstable

Volatile or thermally stable

Non volatile or thermally stable

Volatile or thermally unstable

Which properties of liquid is measured by polarimeter

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Conductance

Refractive index

Optical activity

Change in volume

Haemoglobin is a Macro molecule and consists of approximately atoms.

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5000

10,000

68000

15000

One mole of ethanol and one mole of ethane have an equal

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Masses

Number of atoms

Number of electrons

Number of molecules

Which of the following will have the same number of molecules at STP

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280 cm³of CO₂and 280 cm³of N₂O

11.2 dm³of O₂and 32 g of O₂

44 g of CO₂and 11.2 dm³of CO

28 g of N₂and 5.6 dm³of oxygen

Which of the following elements in its crystalline form will have the lowest enthalpy change of vaporization

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Chlorine

Argon

Phosphorus

Silicon

Standard hydrogen electrode has an arbitrarily fixed potential

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0.00 volts

1.00 volt

0.10 volt

None of these

If we want to change O₂to O₂^-1The electron is to be placed in

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Which of the following hydrogen halide is the weakest acid in solution.

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HF

HBr

HI

HCl

Ethanol can be converted into ethanoic acid by.

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Hydrogenation

Hydration

Oxidation

Fermentation

P2O5 is usually used as

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Drying agent only

Reducing agent

Both drying and reducing agent

Both drying agent and oxidizing agent.

Plastics are pollution problem because many plastics

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are made from petroleum

are very inflammable

burn to produce toxic fumes

decompose to produce toxic products

The most reactive Alkyl halide is

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Alkyl Iodide

Alkyl Bromide

Alkyl fluoride

Alkyl Chloride

Which gas is cause of Asthma

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O₃

O₂

SO₂

CO₂

The pH range of the acid rain is.

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7-6.5

6.5-6

6-6.5

Less than 5

___________ is use as a cooling medium for nuclear reactors

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Ne

He

Ar

Kr

Mono saccharides contain carbon atoms.

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3 to 6

3 to 7

3 to 9

only six

The anhydride of HCIO₄is

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CIO₃

CIO₂

Cl₂O₅

Cl₂O₇

Nylon 6,6 is obtained by the reaction of hexamethylene diamine with

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Acetic acid

Adipic acid

Viny chloride

Acetyl chloride