Question # 1

If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

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1

4

9

12

The ionization potential is lowest for the

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Halogens

Inert gases

Alkaline earth metals

Alkali metals

Which of the following favours the reverse reaction in chemical equilibrium?

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Increasing the concentration of the reactant

Removal of the least one of the products at regular intervals

Increasing the concentration of one or more of the products

None of these

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

Classical smog occurs in palces of

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Excess SO₂

Low temperature

High temperature

Excess NH₃

Carboxyl group has functional group in it:

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One

Two

Three

Four

Bell metal is an alloy of Sn and

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Copper

Iron

Zinc

Magnesium

An alkynes having Carbon count of 20 is

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gas

liquid

Solid

None

By applying Hess's law, we can calculate

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ΔH

ΔS

ΔF

K

Active metals react with carboxylic acid releasing gas:

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CO

CO₂

H₂O as steam

H₂

Reaction takes place at anode is

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Ionization

Reduction

Oxidation

Hydrolysis

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

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CHF Cl C FCl

CH Cl CF₂Cl

CHF CF₂Cl

C FCl CF₂Cl

H-bonding is not present in

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Glycerine

Water

Hydrogen sulphide

Hydrogen fluride

Ozone depletion in stratosphere shall result in

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Forest fires

Increased incidence of skin cancer

Global warming

None of the above

Phosphorous helps the growth of

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Root

Leave

Stem

Seed

Which of the following is most electronegative?

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Carbon

Silicon

Lead

Tin

Optical rotation method is sued when

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Reaction involve ions

Change of refractive indices

Reactions involving change of optical activity

None of the above

With increases of 10°C temperature the rate of reactiondoubles. This increase in rate of reactionis due to :

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Decrease in activation energy or reaction.

Decrease in number of collisions between reactant molecules.

Increase in activation energy of reactants.

Increase in number of effective collisions

Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

Benzene is an example of

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Aromatic compound

Cyclic compound

Aliphatic compound

A cyclic compound

The reaction is galvanic cell is

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Spontaneous

Non-spontaneous

Acid-base

None of these

N₂O₄⇌ 2NO₂

For the above reaction, which of the Following expression of K_c correct :

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Kc = [ N₂O₄]/[ NO₂]²

Kc = [ N₂O₄]/ [NO₂]

Kc = [ N₂O]²/[ N₂O₄]

Kc = [ N₂O₄]/[ N O₂]

Doberiner arranged the similar elements into

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Pairs

Triads

Triplets

Rows

Which of the following isoelectronic ions has the lowest ionization energy?

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K⁺

Ca²⁺

Cl^-

S^2-

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-778.9 KJ

788.0 KJ

-1.9 KJ

+1.9 KJ

Which of the following is a transition element

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Sr

Sn

Cr

Pb

Which are used as essences(flowers)?

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aldehydes

Ketones

alcohols

esters

The function of salt bridge is :

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To increase movement onions.

To increase the emf of cell.

To decrease the temperate

To maintain electrical neutrality

The substances which soften the polymer are called

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Stabilizers

Plasticizers

Retarders

Pigments

Aldehydes can be distinguished from ketones by

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2,4-DNPH test

NaHSO₃test

N₂H₄test

Tollen's test

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

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