Question # 1

Ionic compund are good conductors electricity in

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Solution

Molten state

Solid state

both a and b

Which of the following does not happpen, when a system is at equilibrium state.

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Reaction continues to occur in both the directions

Concentration of reactants and products stop changig

Forward and reverse reactions stop

Forward and reverse rates become equal

The man made polymer is

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Polystyrene

Starch

Protein

Cellulose

Period nuebr tells abou the

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No. of valance electrons

No. of electronic shells

Both a and b

None of the above

Metals are teh elements which have.

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Electronegative character

Electropositive character

Both a and b

None of the above

Atoms react with each other because.

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they are attracted towards each other

They are short of electrons

They want to disperse

They want attain stability

Which is not produced in an aerobic respiration.

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Carbon dioxide

Lactic acid

Water

Energy

Number of electronsin nitrogen molecule is.

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2

4

6

8

The percentage of ²³⁸ U ₉₂ found in nature.

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97%

0.72%

98%

1.5%

The structure of C atom in diamond is.

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Pentagonal

Triangle

Hexahedral

Tetrahedral

17th group elements ae known as

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Alkaki metals

Alkaline earth metals

Noble gases

Halogens

Indicators are the

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Inorganic compounds

Organic compounds

Ionic compounds

Covalent compounds

The gas use by plants to perform photosynthesis.

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O₂

CO₂

N₂

CO

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

Ammonia is prepared by:

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Solvay's process

Haber's process

Floatation process

Bayer's process

Who proposed "Law of mass action"?

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Newton

Boyle

Guldberg and waage

Lavoisier

^{RNA consists of}

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Ribos

Pentose

Hexose

Trioses

Which one of the following is gas at room temperature:

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C2H6

C6H14

C6H6

C8H18

The reduction of alkyl halides takes place in the presence of

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Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

A conjugate base is a specie formed by donating a.

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Proton

Electron pair

Neutron

Electron

Potassium Ferrocyanide is a:

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Normal salt

Mixed salt

Complex salt

Double salt

All bases turn red litmus

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Red

Blue

Pink

White

The drying agents used in desiccator is.

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BeCl2

MgCl2

CaCl2

SrCl2

The azimuthal quantum number / = 2, then M(Magnetic quantum number) can have values as

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+1, -1

+1, 0, -1

+2, +1, 0,1, -1, 2

+3, +2, +1, 0, 1, -2, -3

Which molecules is 100% covalent

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H2

H2O

HF

NH3

Which process is endothermic and spontaneous

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Neutralization of NaOH with HCl

Formation of NH3 from H2 and N2

Formation of H2O from H2 and O2

Evaporation of sea water

Molarity of pure water is

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1

18

55.5

6

Anode rays were discovered by

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J. Stoney

Rutherford

J.J. Thomson

Goldstein

Which statement is incorrect about activated complex

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Short lived

Maximum energy

Unstable combination of atoms

Less energy than Ea

One of the following liquids has lowest vapour pressure at 32°C. Indicate that liquid

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Ether

Chloroform

Ethanol

Water

Gases of air, always remains in the random motion and do not settle due to.

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Elastic collision of gas molecules

Unequal number of different gas molecules

Difference impartial pressure of gas molecules

Difference in molecular masses of air gases

the volume occupied by 1.4 of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

the number of moles of CO2 which contain 8.0 g of oxygen.

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0.25

0.50

1.0

1.50

Transition elements are those

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Which becomes before uranium

Which becomes after uranium

Which are prepared artificially

Which are in between s-block and p - block elements

The macro nutrients are required in ranging from

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5 kg to 200 kg

5 kg to 200 g

6g to 200 g

1 kg to 100 kg

Pulp is washed to remove lignin from it. Due to the presence of lignin in pulp paper becomes.

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Soft

Brittle

Acidic

Colourless

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

The product of fermentation of sucrose is

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Ethanol and H2O

Ethanol and CO

Ethanol and CO2

Glucose and CO2

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

In pyrite burner, the gas produced is.

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SO3

SO2

CO2

NO

The total number of translation elements is

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10

14

40

65

Which acid is used in the manufacture of synthetic fiber

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

Bleaching powder may be produced by passing chlorine over.

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Calcium carbonate

Hydrated calcium sulphate

Anhydrous calcium sulphate

Calcium hydroxide

Sodalime is

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NaOH

Mixture of Na and Ca(OH)2

KOH

Mixture of CaO and NaOH