Question # 1

Avogadrao was a scientist

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Italian

Greek

Garman

African

Actinide series starts after the element

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Actinium

Lanthanum

Osmum

Silver

Any thing that has mass and occupies space is called.

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Liquid

Gas

Solid

Matter

Which branch of chemistry is athe study elements and their compounds except for organic compounds?

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Physical Chemistry

Geochemisty

Organic chemistry

Inorganic chemistry

How many elecntrons are present in the valence shell of group 1 elements.

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1

2

3

4

Elements of Group1 are called.

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Alkali Metlas

Alkali earth metals

Transition metals

Halogen

Empirical formula of Benzene is.

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CH2O

CH

C2H

CH2

A bond formed between two non metals is expected to be

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Ionic

Coordinate covalent

Metallic

Covalent

Proton are feflected toward plate.

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Positive

Negative

Both a and b

None of these

Which one of the following is heterogeneious mixture.

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Milk

Ink

Sugar solution

Milk of magnesia

CaO or lime is used extensive in steel, glass and paper industries. It is produced inan exothermic reversitble reaction by the decompositon of lie . Choose the conditions to produce maximum amount of lime.

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Heating at high temperatur ein an open vessel

Heating at high temperatur ein a closed vessel

Cooling it in a closed vessel

Colling it in an open vessel

____________ use for ripening of fruits.

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Ethene

Ethane

Ethyne

Propane

The reaction in which the products can recombine to form reactants are called.

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Reversible reaction

Irreversible reaction

Decomposition

Addition

Ethylene is present is natural gas sometimes to the extent of .

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10%

20%

30%

40%

Natural gas contains.

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Methane

Ethane

Propane

All

Protein is not found in:

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Muscles

Skin

Cotton

Hair

Which one is Lewis Acid?

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BF₃

AICI₃

FeCl₃

All of these

Carbon black is used in the manufacture of.

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Dry cleaning

Shoe polishes.

Fertilizer

None of these

Manufacturing of urea involves:

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2 steps

3 steps

4 steps

5 steps

We exhale gas in the atmosphere during respiration.

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Carbon dioxide

Oxygen

Nitrogen

Water

The process which convert vegetable oil into banaspati ghee called.

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Hydrogenation

Halogenation

a and b

None of these

The gas use by plants to perform photosynthesis.

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O₂

CO₂

N₂

CO

In which of the following changes, nitrogen in reduced.

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NH3 to NO

NH3 to NO3

N2 to NH3

N-3 to N2

Which concentration unit is independent of temperature.

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Molarity

Molality

ppm

both a and b

The number of Na, ions which surround each CI^1-ion the NaCI crystal lattice is

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8

12

6

4

Alkali and alkaline earth metal are usually obtained by

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Decomposition of their carbonates

By heating their hydroxide

electrolysis of molten metal oxides

Electrolysis of molten metal halides

Which of the following molecules has a co-ordinate covalent bond

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NH₄CI

NaCI

HCI

AICI₃

In a period of periodic table, atomic radii

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Increases

Decreases

Remain same

First decreases than increases

Solubility of which substance decreases by incressing temperature.

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NaNO3

KNO2

NaCl

Ce2(SO4)3

Ascorbic acid is vitamin.

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A

B

C

D

Which of the following represents electronic configuration of the most electropositive elements

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He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

If the salt bridge is not used between two half cells, then the voltage.

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Decrease rapidly

Decrease slowly

Drops to zero

Does not change

Which electron traveled more distance, when jump from

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n1 to n2

n2 ato n3

n3 to n2

n3 to n4

The colour of transition metal complexes

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d-d transitions of electrons

paramagnetic nature of transition elements

ionization

loss of s-electron

Which is not a calcarious material

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Clay

Limestone

Marble

Chalk

Which one of the following products is not formed when acetic acid reacts with PCl5

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C2H5Cl

HCl

POCl3

CH3COCl

Mark the correct statement.

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Na+ is smaller than Na atom

Na+ is large than Na atom

Cl- is smaller than Cl atom

cl- and Cl are equal in size

Micro nutrients are required in quantity ranging from

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4 g - 40 g

6 g -200 g

6kg - 200 kg

4 kg - 40 kg

Which of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lipase

In group VA elements the most electronegative elements is.

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Sb

N

P

As

Which compound shows maximum hydrogen bonding with water

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CH₃OH

C₂H₅OH

CH₃- O - CH₃

C₆H₅OH

Which property of triglycerides is used to determine its molecular mass.

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acid number

Saponification number

Iodine number

gold number

Which of the following has highest boiling point

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Methanal

Ethanal

Propanal

2-hexanone

Acetic acid is commercially prepared form

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Ethene

Ethane

Ethyne

Ethanol