Question # 1

Molarity is the number of moles of solute dissolved in:

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1 kg of solution

100 g of slovent

Idm³ of solvent

I dm³ of solution

Transfer of electrons between atoms results in:

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metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

"×" & "." Represent:

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Shells

Neutrons

Electrons

Atoms

Solids are fixed ____________

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Shape

Velocity

Mass

Atoms

For ________________ "like dissolves like".

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Metals

Bonds

Solubility

Nil

Which one of the following will not react with dilute HCI?

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Sodium

Potassium

Calcium

Carbon

Smoke in air is the example of solution.

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Gas in Gas

Gas in liquid

liquid in Gas

Solid in Gas

Gold can only be dissolved by:

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Acids

Bases

Aqua Regia

Nil

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

Reduction means

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Removal of H2

Removal of electrons

Gain of electrons

Gain of O2

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

Which disease cause liver inflammation?

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Typhoid

Jaundice

cholera

Hepatitis

In which of the following groups , oxygen is attached on both sides with carbon atoms.

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Ketone group

Ether group

Aldehyde group

Easter group

Oxidation of alkenes produce.

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Glyoxal

Glycol

Oxalic acid

Formic acid

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

The residual oil is heated above 400 c to produce.

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Lubricants

Paraffin wax

Asphalt

All

___________ is not mineral acid.

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HCl

CH₃COOH

H₂SO₄

HNO₃

Chemical formula of hypochlorous acid is.

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HCl

HOCl

H₂CO₃

HF

The molecular formula of the first three members of the alkane hydrocarbons are CH_4,C₂H₆ and C₃H₈. What is the molecular formula for the eight alkane member, octane, which is found is petrol?

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C₈H₈

C₈H₁₆

C₈H₁₈

C₈H₂₀

Nucleic acids made up of long chain of.

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Nucleotide

Fatty acids

Amino acid

None of them

Which one of the following disease causes severe diarrhea and can be fatal:

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Jaundic

Dysentery

Cholera

Typhoid

In a chemical reaction, the substance that combine are called.

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Reactant

Products

Mass

Material

If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air

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Remains constant

Increase

Decrease

Increase a bit

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

The law of mass action was given by

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D.C. down and P wage

Gay Lussic and C.M

C.M Goldberg and P. Waage

Hendeson and Le Chateller's

The concept of distribution of velocities among the gas molecules was given by.

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Clausius

Mexwell

Boltzmann

Vander waal

Which of the following solution s has the highest boiling point.

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5.85% solution of sodium chloride

18.0 % solution of glucose

6.0% solution of urea

All have the same boiling point

Acetone and chloroform are soluble in each other due to

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Intermolecualr hydrogen bonding

Dipole-dipole interaction

Instantaneous dipoles

All of the above

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

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PM= nRT

PV = nRT

PV = dRT

PV= nTP

Rate of a chemical reaction generally increase rapidly even for small increase in temperature because of rapid increase in the

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Collisions frequency

Activation energy

Average KE of molecules

Fraction of molecules with energies more than activation energy

Gases exert pressure on the walls of the container becasue the gas molecules.

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Collide with each other

Collide with walls of container

Have definite volume

Obey the gas laws

Vapour pressure of liquid depends upon

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Amount of liquid

Surface area

Temperature

Size of container

In zero order reaction, the rate is independent of.

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Temperature of reaction

Concentration of reactants

concentration of products

None of these

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

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

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HF

HBr

HI

HCl

Acetylene reacts with ammoniacal cuprous chloride a red ppt is formed. This red ppt is of

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Copper chlorite

Coper chlorate

Cupric oxide

Copper acetylide

In which hybridization bond angle is maximum

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sp3

sp2

sp

sp3 and sp have same angles

The brown gas formed, when metal reduce HNO₃

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NO

NO₂

N₂O₃

N₂O₅

Which element is present in chlorophyll

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Ca

Mg

K

Be

Which makes a molecule more stable.

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Greater localization of pi electrons

Less delocalization of pi electrons

Greeter delocalization of pi electrons

Less delocalization for pi electrons

Element of which group reacts with hydrogen and form ionic hydrides.

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II A

IV A

V A

VI A

The oligosaccharides contain number of hexose unit.

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2 to 7

2 to 8

2 to 9

2 to 100

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

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N₂/ Ni

H₂/Pt

NaBH₄

LiAIH₄

Which one is cyclic amino acid

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Glycine

Alanine

Proline

Aspartic acid