Question # 1

When a reaction will be come a reversible one?

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If the actvation eneryg of the forward reaction is comparrble to that of backward reaction

If the activation energy of the forward reaction is higher than that of backward reaction

If the activationenergy of the forward reaction is lower than that of backward reaction

If the enthalpy change of both the reactions is zero.

Metals lose their elecrons easily because.

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They are elecrnegativity

They have electron affinity

They are electropositive

Good conductors of heat

Atomic number of lanthanum is

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57

58

59

60

How many number of moles are equivalent to 8 gram of CO2.

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0.18

0.15

0.24

0.21

Metals can form ions carrying carges.

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Uni positive

Di positive

Tri postive

All of these

A reverse reaction is one that

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Speeds up gradually

Proceeds from left to right

In which reactants react to form products

Slow down gradually

Whcih branches of chemistry deals with the changes that occur in atomic nuclei.

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Environmental chemistry

nuclear chemistry

Astrochemistry

Bio chemistry

²³⁸U₉₂ has number of neutrons.

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92

146

238

330

An atom having six electonsin its valence shell will achieve noble gas electronic confguration by

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Gainign one electron

Gaining two electrons

Losing all electrons

Losing two electrons

According to Arrhenius concept acid is a substance which dissociates in aqueious solutin to give.

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Proton

Pair of Electron

Hydrogen Ions

Hydroxide ion

Which is released in anacrobic respiration.

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Stearic acid

Citric acid

Lactic acid

Amino Acid

Matter can be described by both is

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Chemical Properties

Physical Properties

Physical propeties and chemcial properties

None of these

Which one of the example of colloid.

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Paints

Milk of magnesia

Jelly

None of these

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