Question # 1

The organic compounds which derivative of hydrocarbons due to oxygen is:

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Phenol

Alcohol

Alkyl halide

Either

The force which holds the atoms together to form a compound is called

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A chemical bond

Van der waal's force

Dispersion force

London force

Which of the following elements does not show variable oxidation states?

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Copper

Iron

Zinc

Titanium

The reaction rate is expressed in the units of

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mol dm^-3S^-

mol dm^-3

mol dm^-3N^-

dm^-3S^-

A compound contains 75% carbon and 25% hydrogen, by mass. What is the molecular formula of the compound/

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C₃H₈

CH₄

C₂H₄

C₂H₆

During the preparation of alkynes the active metals that react with tetra halo-alkanes are

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Zn

Mg

Both a and b

None

Acetic acid is manufactured by the fermentation of

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Ethanol

Methanol

Ethanal

Methanal

Which property depends on the state of system

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Enthaply

Free energy

Entropy

All these

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The state of hybridization of carbon atom in methane is

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sp³

sp²

sp

dsp²

Which represents nucleophilic aromatic substitution reaction?

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Reaction of benzene with Cl₂in sunlight

Benzyl bromide hydrolysis with water

Reaction of NaOH with dintrofluoro benzene

Sulphonation of benzene

The number of neutrons in the element ⁹₄Be is

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4

5

9

13

A standard hydrogen electrode (S.H.E) consists of a platinized platinum electrode dipped in 1 molar solution of H⁺ions and hydrogen gas is passed at a pressure of

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One pascal

One kilo pascal

One atmoshpere

Then atmoshpere

Which among the following species has the highest ionization energy?

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Ne

F

Li

B

If the rate of decay of radioactive isotope decreases from 200 cpm to 25 cpm after 24 hours, what is its half life :

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8 hours

6 hours

4 hours

3 hours

Number of moles of solute dissolved in 1 Kg of solvent is knowns as

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Molarity

Formality

Molality

Mole fraction

Sodium phenoxide reacts with CO₂at 400 K and 4.7 atm pressure to give

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Sodium salicylate

Salicyl aldehyde

Catechol

Benzoic acid

Crystalline form of sulphur stable at room temperature is

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Rhombic sulphur

Monoclinic sulphur

Plastic sulphur

Prismatic sulphur

Isotonic solutions have same

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Molar concentration

Molality

Normality

None of these

When formaldehyde is added to Grignard reagent we get

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Aldehyde

Acetone

Primary alcohol

Secondary alcohol

An azeotropic mixture of two liquids boils at a lower temperature than either of them when lower temperature

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It is saturated

it shows positive deviation from Raoult's law

It shows negative deviation form Raoult's law

It is metastable

96500 C electricity is passed through CuSO₄. The amount of copper precipitated is

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0.25 mole

0.5 mole

1.0 mole

2.00 mole

Hydrocarbons contain :

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Carbon only carbon

Hydrogen only

Carbon & hydrogen

Carbon , hydrogen & halogen

Acetylene had a characteristic ethereal smell resembling that of

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Ginger

Vinegar

Garlic

Onion

The elements of sub-group A are called

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Transition elements

Main elements

Typical elements

Rare earth elements

Synthetic polymer prepared from caprolactum is known is

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Nylon 610

Teflon

Terylene

Nylon-6

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Initial concentration of reaction

Initial concentration of products

Final concentration of products

Order of the reaction

Phosphorus pentoxide finds use as

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An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

Carbonates of alkali metals dissolves freely in water to form

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Acidic solutions

Neutral solution

Alkaline solution

None of these

In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because

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The radiations emitted in emission spectrum are absorbed in absorption spectrum

Atomic emission spectrum is continuous

Atomic absorption spectrum is continuous

Distance between the lines increases

The number of unpaired electrons in ferrous ion ( Z - 26) is

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3

2

4

5

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