Question # 1

Which has biger particles?

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Solutions

Colloids

Suspensions

True solutions

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

At freezing point which one of the following coexists in dynamic equilibrium?

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gas and solid

liquid and gas

liquid and solid

all of these

_________ shells of noble gases is complete.

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Outer most

2

1

Nil

The maximum no.of electrons that can be accommodated in M shell are

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2

8

18

32

Mobility is property of ____________

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Liquid

Gases

A & b

Nil

Metals are covered by using.

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Baeyer's test

Bohr's

Electrolysis

None

The metallic plates through which electrons enters and leaves electrolytes:

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Wires

Electrodes

Both

Nil

Carbon exists in ________________ allotropic forms.

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1

2

3

4

The equation of relationship between atomic number (Z) and mass number (A) is

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A = Z + N

A = Z - n

A = Z

A =2Z + n

Solid particles possess which one of the following motions?

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rotational motions

vibrational motions

translation motions

both translational and vibrational motions

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

Margarine is produced by adding hydrogen to vegetable oil at.

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2000 ^oC

100^oC

200^oC

1000^oC

General formula of carbohydrates is.

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C_n(H₂O)₆

C_n(H₂O₂)₆

C_n(H₃O)₆

C_n(H₂O₃)₆

Depending upon temperature variation, atmosphere ins divided into how many regions?

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1

2

3

4

Dynamic means, reaction is:

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In forward direction

Stop

In reverse direction

Still continuing.

Hookworm is a parasite that infects the:

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large intestine

small intestine

stomach

liver

In laboratory urea was prepared by

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Wohler

Rutherford

Berzelius

Dalton

Incinerator reduces solid waste into .

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Ash

Flue gas

Heat

All of them

Which organ cause to function during Jaundice?

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Liver

Kindney

Stomach

Large intestine.

Example of complex salt is.

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Zinc sulphate

Potash alum

Potassium ferrocynide

Sodium Phosphate

Which acid is used for food preservation?

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Hydrochloric acid

Benzoic acid

Sulphuric acid

Nitric acid.

Which one of the following expressions is for ideal gas equation.

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PM= nRT

PV = nRT

PV = dRT

PV= nTP

The bond order of N2 molecule is.

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1

2

3

4

Which of the following contains the same number of molecules as 9 g of water.

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2 g of hydrogen gas

14 g of nitrogen gas

32 g of oxygen gas

44 g of carbon dioxide gas

Two solution of NaCI and KCI are prepared separately by dissolving same moles of them in the fixed amount of solvent. Which of the following statements is true for these solution

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KCI solution will have higher boiling point than NaCI solution

Both the solutions have different boiling point

KCI and NaCI solution possess same vapour pressure

KCI solution possesses lower freezing point than NaCI solution

When a non-spontaneous redox reaction is carried out by using the electrical current, then the process is called

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Decomposition of the substances

Cracking

Hydrolysis

Electroiysis

In which compound the oxidation number of Mw is +6

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KMnO4

K2MnO4

MnO2

MnO

Electrolysis is used for

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Electroplating

Refining of copper

Manufacture of caustic soda

All of the above

The molecules of CO₂in dry ice form the

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Ionic crystal

Covalent crystals

Molecular crystals

Any type of crystals

K_aand K_bof a conjugate acid and are related with k_was

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K_a+ K_b=K_w

K_a-K_b=K_w

K_a.K_b= K_w

K_a/ K_b= K_w

Which statement about a molecule is incorrect.

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It exist independently

Molecules of a substances are similar

Hemoglobin is a homoatomic molecules

Oxygen molecule is a macromolecule

Haemoglobin is a Macro molecule and consists of approximately atoms.

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5000

10,000

68000

15000

Ecosystem is smaller units of.

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Lithosphere

Hydrosphere

Atmosphere

Biosphere

Hydrolysis of benzene sulphonic acid with superheated steam or by boiling with dil HCl gives.

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Toluene

Benzene

Xylene

Chlorobenzene

An sp3- hybrid orbital contains.

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25% s- characters

50% s- characters

75% s- characters

100% s - characters

Air of the following tests are used to identify aldehydes except.

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Tollen's test

Fehling test

Baeyer's test

Benedict test

When methane reacts with Cl2 is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Main source of aromatic compound is

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Petroleum

Coaltar

Living organisms

Dead marine animals

Kerosene oil is a mixture of hydrocarbon having carbon

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11 to 13

10 to 12

11 to 12

8 to 9

Which class of elements shows law value of first ionization potential.

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Alkali metals

Alkaline earth metals

Halogens

Noble gases

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

Ethanol reacts with Na metal to form sodium ethoxide. What product will be formed when C2H5ONa reacts with methyl bromide.

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C2H5OC2H5

C2H5OCH3

CH3COC2H5

C2H5Br and NaBr

Which meal is least reactive

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Li

NaOH

K

Pb