Question # 1

Which one is not a property of electrolytic cell?

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It consists of one complete cell

Anode has +ve charge

It converts electrical energy into chemical one

Anode has -ve charge

Which one is strong electrolyte ?

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NH4OH

NaOH

a & b

Nil

Diamonds exists in ____________ form.

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Cubic

Linear

Circular

Nil

At ____________ °C water converts to ice.

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101°

100°

99°C

100.2°C

It is a triatomic molecule

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Sodium chloride

Water

Chalk

Glucose

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

................. can be decomposed into simpler substanmce.

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Compound

Element

Solution

Mixture

________________ solids are hard.

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Ionic

Covalent

Coordinate

Nil

Metal oxides are

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Amphoteric

Basic

Acidic

Neutral

The vertical columns in the periodic table are called:

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perlods

groups

rows

blocks

In diamonds, carbon are ____________ bonded.

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Tetrahedrally

Single

Double

None

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

Who put forward '' the vital force theory''?

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Kolbe

Wohler

Berzellius

Jabir - Bin - Hayan

General formula of alkynes is:

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C_nH_n

C_nH_2n

C_nH_2n+2

C_nH_2n-2

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

Iron and steel structure are damaged by.

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Carbon monoxide

Sulphur dioxide

Methane

Carbon dioxide

Which one of these is a saturated hydrocarbon?

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C₂H₄

C₃H₆

C₄H₈

C₅H₁₂

The color of Fe(OH)₂ ppt is.

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White

Brown

Muddy green

Blue

Chalco-Pyrite is an ore of:

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Copper

Silver

Iron

Aluminium

Lipids are macromolecules. They have characteristics except one of the following.

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They are high energy foods.

They are soluble in water.

They are poor conductor of heat.

They are esters of fatty acids.

Oxidation of ethene with KMnO₄produces.

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oxalic acid

glyoxal

ethene glycol

Propene glycol

When the magnitude of Kc is very large in indicates.

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Reaction never go to completion

Reaction is in equilibrium state

Reaction will complete after some time

Reaction has almost to completion

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

In order to mention the oiling point of water at 110 ^oC, the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded byH2O molecule, This process is known as.

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Hydrolysis

Hydration

Saturation

solvolysis

Depression in the F.P is directly proportional to

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Molarity of solution

Molarity of solvent

Molality of solvent

Molality of solution

Exceptionally low acidic strength of HF is due to.

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Strong polar bond between H and F

Smaller size of fluorine

Strong hydrogen bonding

electronegativity of fluorine

Depression of freezing point method is used for determination of molar masses of

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Electrolytes

Non-volatile solids

Volatile solids

Volatile liquids

If a strips of Cu metal is placed in a solution of FeSO4

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Cu will be precipitated down

Fe is precipitated out

Cu and Fe both dissolve

No reaction takes palce

A component having small value of K mostly remains in the.

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Stationary phase

Mobile phase

Chromatographic tank

Solvent

In silver oxide battery, anode is made of.

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Zinc

Copper

Lead

Graphite

In order to have good crystals of a substance the temperature of the system at the time of preparation of solution should be

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Around 0°C

Around room temperature

Sufficiently more than room temperature

Just above the room temperature

Which of the following molecules have highest bond energy

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F2

Cl2

Br2

I2

The percentage of carbon is different types of iron products is in the order of.

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Cast iron > wrought iron > Steel

Wrought iron >Steel >Cast iron

Cast iron > Steel > Wrought iron

The reaction between concentrated H2SO4 and glucose give carbon and water. In this reaction H2SO4 acts as.

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An acid

An oxidising agent

Dehydrating agent

A reducing agent

Which substance is used to consulate rubber latex

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Ethyl alcohol

Acetaldehyde

Acetic acid

Water

Which substance shows very weak hydrogen bonding with water.

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Methanol

Ethanol

Diethyl ether

Benzene

In Down's cell anode is made up of.

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Iron

Copper

Graphite

Platinum

The reactivity order of alkyl halides for a particular alkyl group is.

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Fluoride > Chloride > Bromide > Iodide

Chloride > Bromide >Chloride > Fluoride

Iodide > Bromide > Chloride > Fluoride

Bromide > Iodide > Chloride > Fluoride

Cholesterol is a

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Glyceride

Wax

Steroid

Fat

Which substance usually undergo nucleophilic addition reactions.

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Benzenes

Aldehydes

Alkenes

All of these

The avoid teh formation of toxic compounds with chlorine which substance is used for disinfecting water.

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KMnO4

O3

Alum

Chloramines

the percentage of nitrogen in NH3 is

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46%

60%

82%

100%

In ethene molecule how many carbon orbitals are equivalent and degenerate in nature.

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3

4

5

6