Question # 1

Similarity in properties of different organic compounds give rise to the under standing of ______

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Polymerization

Non-polar nature

Homologous series

Isomerism

The uncertainty principle was stated only

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De Brogilie

Heinsenberg

Einstein

Schrodinger

Chemical reactivity of elements depends upon their characteristic:

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Shape.

Color.

Electronic configuration.

Sizes

Which of the following derivative can not be prepared directly from acetic acid

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Acetamide

Acetyl chloride

Acetic anhydride

Ethyl acetate

Atoms obey octet rule by sharing-electrons making covalent bonds according to

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Lewis and Kossal theory

Valance bond theory

VSEPR theory

Molecular orbital theory

Which statement is true about order of reaction :

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Order of reaction can only be determined by an experiment.

Order of reaction can be determined from a balance equation only.

Order of reaction increase by increasing temperature.

Order of reaction must be in whole number and not in fraction.

Angle 120° is observed in molecules :

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CH₄

CH_3-CH₃

CH -CH

CH_{2 =}CH₂

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Forward reaction is favoured

Backward reaction is favoured

No effect

None of the above

Which one is the most toxic?

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Carbon

CO

CO₂

SO₂

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

When H₂and I₂are mixed and equilibrium is attained, then

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Amount of HI formed is equal to the amount of H₂dissociated

HI dissociation stops

The reaction stops completely

None of these

The formula of calcium superphosphate is

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CaHPO₄

CaH₂PO₄

Ca(H₂PO₄)₂

None of these

Phosphine is not obtained by the reaction when

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White P is heated with NaOH

Red P is heated with NaOH

Ca₂P₂reacts with water

PH₄l is boiled with water

In the reaction K₂Cr₂O₇+ HCl + CrCl₃+ Cl₂+ H₂O the element which is reduced is

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K

Cl

Cr

H

The amount of products obtained from the balanced chemical equation is regarded as

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Theoretical yield

Actual yield

% yield

Experimental yield

The solubility of PbF₂is 2.6 x 10^-3mole dm^-3then its solubility product is

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2.6 x 10^-3

6.76 x 10^-6

5.2 x 10^-6

7.0 x 10^-8

Rutherford's atomic model suggests the existence of

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Atom

Nucleus

alpha particle

Measons

Which metal is used for catalytic hydrogenation of oils

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Cu

Pt

Ni

Pd

Reaction of ethylamine with chloroform in alcoholic KOH produces

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

When the electron jumps form third, fourth, fifth orbits to the second orbit, the transitions are known as

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Paschen

Pfund

Balmer

Brackett

Which metal is used in the thermit process because of its activity?

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Iron

Copper

Alumnium

Zinc

The gasoline with high octane No. has ______

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More knocking

Less knocking

No knocking

Only knocking

Which is symmetric alkene?

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CH=C-CH₂

CH≡CH

CH₃-C≡C - CH₃

B and C

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

The chemical formula of Trona is

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KCl . MgCl₂. 6H₂O

Na₂CO₃. 2NaHCO₃. 2H₂O

Na₂CO₃. H₂O

KCl

Electrolytes in the form of solution or in the fused state have the ability to conduct :

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Light.

Electricity.

Ions.

Electrons.

The process in which one s and two p orbitals mix up with each other is called

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Sp-hybridization

Sp²-hybridization

Sp³-hybridization

Dsp²-hybridization

Which alcohol gives only one oxidation product when wormed with dil acidified K₂Cr₂O₇

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Butan-1-ol

Butan-2-ol

2-methyl propan-1-ol

2-methyl propan-2-ol

An organic compound will decolorise dill acidified (aq) KMnO₄on warming, but will not decolorise bromine water. What is the compound

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KMnO₄

Ethanol

Ethane

CH₃CH₂Cl

Alkyle halides can be prepared by treating halogen acids with

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Ethane

Ethanol

Ethene and ethanol

Aldehyde

The electronegativity of elements in a period from left to right

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Decreases

Increases

First decreases then increases

First increases then decreases

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