Question # 1

Period nuber of ²⁷ Al ₁₃ is

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1

2

3

4

Number of peiod in the periodic table are.

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7

8

5

16

Elements with atomic no .58 to 71 are called.

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Actinides

Lanthanides

Both a and b

None of these

Which one of the followign halogns has highest electronegativity

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Iodine

Fluorine

Chlorine

Bromine

Industrialy, ammonia is produced by which process.

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Halogenation

Solvay process

Haber Process

Hydrogenation

A compound with chemicla formula Na₂CX₃ has formula mass 106 ami. Atomicmass of the elemetn X is.

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16

23

12

106

Formation of ammonia from Nitrogen and hydrogen is an.

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Exothermic reaction

Endothermic reaction

Both a and b

No heat change

How many elements are present in 7th period.

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2

8

18

23

To Identify the concentration of a particular solution through titration is and application of.

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astrochemistry

analytical chemistry

geochemistry

Organic chemistry

No reaction occurs if the energy of reacting particles.......activation energy.

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Lower than

Greather than

Nearest to

Equal to

In the beginning the rate of reverse reaction is.

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Slow

very fast

Moderate

Negligible

Which gas is produce by the electrical lightening of air.

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NO

SO₂

SO₃

CO₂

Runcid butter has

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Foul smell

Rotten egg smell

Pungent smell

No smell

In the preparation of insoluble salts, which one of the facts is incorrect?

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Two soluble salts are mixed

Two in soluble salts are mixed .

One of the salt produced is insoluble

Both of the salts produced are insoluble

Which acid is found in Ant sting?

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Citric Acid

Formic Acid

Uric Acid

Sulphuric acid

Water which produces good lather with soap is called.

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Soft water

Hard water

Heavy water

All of them

Which pollutant is not found in car exhaust gases?

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CO

O₃

NO₂

SO₃

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next number of the same homologous series.

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C₉H₁₈

C₉H₁₆

C₉H₂₀

C₉H₁₂

Phenolphthalein produces red colour in

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Acid

Base

Both a and b

None of these

Effects of ozone depletion are following except the one.

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Increases infectious diseases

Increases crops production

Can cause skin cancer

Can cause climatic changes.

By which process alkenes are prepared from alcohols:

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Dehelogenation

Dehydrogenation

Dehydration

Dehydro-halogenation

Froth flotation process is used to concentrate.

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Copper ore

Iron ore

Chromium ore

Aluminum ore

A substance which rerareds the rate of a reaction is called

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Inhibitor

Activator

Auto-catalyst

None of these

The unit of rate constant is the same as that of the rate of reaction is.

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

In a group of periodic table, ionization energy.

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Decreases

Increases

Remains same

First increases than increases

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

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8

12

6

4

Dipole-dipole forces are present among.

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Molecules of Iodine

Atoms of Neon i gaseous state

Chloroforms' molecules

CCl4 molecules

Which has greater reduction potential

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Na

H2

Zn

F2

An atomic orbital has l =1 , m =+1, 0, -1, n = 3 than which one of the following atomic orbital has such values.

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2s

2p

3p

3d

Which statement is true about Na and Na+

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size of Na is greater than Na+

Size of Na is smaller than Na+

Both have equal size

Both have same properties

Cell potential depends upon

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Temperature

Concentration of ions

Nature of electrolyte

All of above

Chlorine atom and chloride Cl- ions

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Have same chemical and physical properties

Are allotropes of chlorine

Have same number of electrons

Have same number of proton

The drying agent used in a desiccator.

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Agcl

NH4Cl

P2O5

AlCl3

Which has greater hydration energy.

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Li+

Na+

K+

Mg+2

m-choronitro benzene is prepared by

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Nitration of chlorobenzene

Nitration of Benzene

Chlorination of Nitrobenzene

Nitration of m-chlorobenzene

One of following is argillaceous material

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Marble

Clay

Lime

Marine Shell

Which compound shows maximum hydrogen bonding with water.

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CH3OH

C2H5OH

CH3-O-CH3

C6H5OH

Which one is an incomplete period

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4th

5th

6th

7th

Which alkyne reacts with water and form aldehyde

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Ethyne

Propyne

1- Butyne

2- Butyne

During nitration of benzene, the active nitrating agent is

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NO₃

NO₂⁺

NO₂^-

HNO₃

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

What product are formed by the oxidative cleavage of 2-butene by alkaline KMnO4.

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Propionic acid and formic acid

Ethanoic acid only

Ethanal only

Water and ethanol

When benzaldehyde is converted to benzyl alcohol by reading with NaOH the reaction is known as.

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Cannizzaro reaction

Wurtz reaction

Wol;ficisthner reaction

Aldol reaction

The reaction of alkyl halides with sodium metal in the presence of ether to from alkane is known as.

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Wortz reaction

Frankland reaction

Sabatier sendron

Kolbe's synthesis