Question # 1

Maximum freezing point falls in

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Camphor

Naphthalene

Benzene

Water

Coordination number of Pt in [PtCI(NO₂) (NH₃)₄]²⁺is

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2-

4

1

6

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

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Ozone

Nitrous oxide

Sulphure dioxide

Carbon monoxide

Any other aldehyde except formaldehyde on reaction with Grignard's will produce

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Secondary alcohol

Primary alcohol

Tertiary alcohol

Aromatic alcohol

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

The largest number of molecules are present in

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3.6 g of H₂O

4.8 g of C₂H₅OH

2.8 g of CO

5.4 g of N₂O₅

Which of the statements given below concerning properties of solution, describe a colligative effect?

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Boiling point of pure water decreases by the addition of ethanol

Vapour pressure of pure water decreases by the addition of nitric acid

Vapour pressure of pure benzene decreases by the addition of naphthalene

Boiling point of pure benzene increases by the addition of toluene

Aldehydes give reactions :

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Oxidation and reduction

Base-catalysed nucleophilic

Acid catalysed nucleophilic

All of these

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NH₃ HCl

KCN in C₂H₅OH NaOH

KCN in C₂H₅OH HCl

HCN NaOH

Which of the following are electropositive in nature

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Alkali metals

Alkaline earth metals

Halogens

Alkali and alkaline earth metals

Products of coal is:

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Peat

Lignite

Bituminous coal

All above

In the chemical combination of hydrogen and fluorine to form HF:

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Sodium atom donates major share of its electrons.

Hydrogen atom donates the major share of its electrons.

Both the atoms share the electrons equally.

None of above.

The other name for distribution law is

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Dispersive law

Partition law

Avogadro's law

separation law

The osmotic pressure of 1 m solution at 27°C is

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2.46 atm

24.6 atm

1.21 atm

12.1 atm

Fossil fuels consist of :

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Coal

Natural gas

Petroleum

All of these

The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called

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Kolbe's reaction

Perkin's reaction

Sandmeyer's reaction

Schotten Baumann reaction

Transition elements have valence electrons in

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s-orbital

p-orbital

d-orbital

f-orbital

By simply reacting Grignand's reagent with water we get

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An alkane

Higher alkane

An alkene

An alkyne

The wave number of light emitted by a certain source is 2 x 10⁵m. The wavelength of this light will be:

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500 NM.

500 M.

200 NM.

5 x 10⁷m

Which of the following statements is not true?

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Isotopes with even atomic masses are comparatively abundant

Isotopes with even atomic masses and even atomic numbers are comparatively abundant

Isotopes with even atomic masses and odd atomic number are comparatively abundant

The Mn³⁺has ______ color

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Violet

Green

Red/brown

No color

Which of the following is a typical transition metal

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Sc

Y

Ra

Co

With the increase in size of halogen atom the reactivity of an alkyl halide

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Increases

Decreases

Remain constant

None of these

The less reactivity of transition metal is due to

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High heats of sublimation

High ionization energies

Low heats of salvation

All these

Colligative properties are the properties of :

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Dilute solutions which behave as nearly ideal solutions.

Concentrated solutions which behave as nearly non-ideal solutions.

Both(i) and (ii)

Neither (i) nor (ii)

Compounds having the same molecular formula, but different functional groups show

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Metamerism

Position isomerism

Chain isomerism

Functional group isomerism

In Dow's method, phenol can be made from

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Chlorobenzene

Benzene

Toluene

Benzene sulphonic acid

The rate of reaction determined at a given time is called

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Average rate

Instantaneous rate

Specific rate

Overall rate

The 95.5% mass of Lithosphone is made of 11 elements i.e. O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. which element is present in trace amount

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Iodine

Bromine

Lead

Carbon

Which of the following is a noble gas:

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Ne.

Cl₂.

H₂.

N₂.

Time required to deposit one millimole of aluminium metal by the passage of 9.65 amperes through molten electrolyte containing aluminium ion is

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30 s

10 s

30,000 s

10,000 s

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