Question # 1

Increase in ________________ increase evaporation.

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Temperature

Stronger

All

None of above

All are noble metals except:

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Silver

Gold

Hydrogen

Platinum

H8+ _ Cl8- , the charge on H is.

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_

+

Neutral

Nil

The unit of Molarity is :

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Molar

Volume

Both

Nil

The no.of neutrons in deutrium is

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1

2

3

4

It is a strong electrolyte

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H2O

CH3COOH

NaOH

C6H6

Which molecules is donor in nature?

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H₂

NH₃

O₂

HF

The earth is made up of ___________ % of iron.

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4

5

6

7

Pure alkali metals can be cut simply by knife but iron cannot because of alkali metals have:

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Strong metallic bonding.

Weak metallic bonding

Non- metallic bonding

Moderate metallic bonding

There are ____________ states of matter

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4

3

2

1

Which radioisotope is used for the diagnosis of tumor in the body?

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cobalt-60

iodine-131

strontium-90

phosphorus-30

Which diseases cause by the deficiency of vitamin E?

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Rickets

Anemia in babies

Scurvy

Night blindness

Carbonization process is the conversion of

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Coal into coal gas

Coal into wood

Wood into coal

Wood into coal tar

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

Which acid is used for etching designs on copper plates?

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H₂SO₄

HNO₃

HCl

CH₃COOH

Which gas like a glass wall of g green house:

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CO

O2

CO2

N2

Calcium carbonate is in water.

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Insoluble

Sparingly

None of them

Soluble

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

Which one of the following is a synthetic fibre?

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Cotton

Wool

nylon

silk

Chemical formula of amino group is

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NH₃

NH₂

NH₄

COOH

pH of neutral solution is always.

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6

5

7

10

When glucose and fructose combine and forms.

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Starch

Cellulose

Sucrose

None of these

During combustion analysis, CO2 produced is absorbed in

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Mg (CLO4)2

50% KOH

CaCl2

P2O5

Dipole Moment of H2O is.

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1.61 D

1.85 D

0.95 D

1.49 D

Under which conditions of temperature and pressure will a real gas behave most like an ideal gas.

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Low temperature and how pressure

High temperature and high pressure

Low temperature and high pressure

High temperature and low pressure

Which of the following represents electronic configuration of the most electropositive elements

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He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

Cadmium has isotopes.

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3

4

5

9

Two solution of NaCI and KCI are prepared separately by dissolving same moles of them in the fixed amount of solvent. Which of the following statements is true for these solution

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KCI solution will have higher boiling point than NaCI solution

Both the solutions have different boiling point

KCI and NaCI solution possess same vapour pressure

KCI solution possesses lower freezing point than NaCI solution

The boiling point of pure water at 1 atm pressure is.

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98^oC

100^oC

69^oC

120^oC

Which pair of compound are isomorphic in nature.

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NaCl and KNO3

KNO3 and MgO

MgO and NaF

CaF and CaCO3

The sum of all kinds of energies of atoms, ions or molecules of a system is known as.

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Kinetic energy

Potential energy

Internal energy

Solar energy

The molal boiling point constant is the ration of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed

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If the paper covers the funnel up to its circumference

If the paper has got small sized pores in it

If the stem of the funnel is large so that it dips into the filtrate

If the paper fits tightly

Which alkyne reacts with water and form aldehyde

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Ethyne

Propyne

1- Butyne

2- Butyne

The temperature in the incineration of industrial and hazardous waste process has a range.

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900 to 1000 ^oC

250 to 500^oC

950 to 1300^oC

500 to 900^oC

Which is called marsh gas

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S2Cl2

SOCl2

CH4

CHBr3

Variable valency is generally exhibited by

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Transition elements

Alkali metals

s-block elements

Gaseous elements

The carbon atom of a carbonyl group is

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sp hybridized

sp²hybridized

sp³hybridized

none of these

Acetylene polymerized in the presence of ammonium chloride and cuprous chloride ot form.

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Benzene

PVC

Di vieiyl acetylene

Polyethene

Amongst the following, the compound of that can be most readily sulphonated is

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Toluene

Benzene

Nitro-benzene

Chloro-benzene

Which enzyme is not involved in fermentation of starch.

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Diastase

Zymase

Urease

Invertase

The state of hybridization of "C" in ethane is

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SP

sp²

dsp²

sp³

All of the followings react with Fehling solution except

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CH2CH2CHO

CH3-CH2COCH3

HCHO

CH3-CHO

The IUPAC name of CH3OCH6H5 is

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Methyl phenyl ether

Methaoxy benzene

Phenoxy methane

methoxy phenyl