Question # 1

Which one of the following is the most abundant organic substance found in nature

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Fructose

Starch

Glucose

Cellulose

The polymers which can be re-softened again and again are caled

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Thermoplastic

Thermosetting

Both a and b

None

The atomic number of an element is 35 what is the total number of electrons present in all the p-orbitals of the ground state atom of that element?

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6

11

17

23

If initial concentration of the reactants and half life period of the reaction is known, then we can determine

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Average rate of reaction

Order of reaction

Rate constant k

Instantaneous rate

Cyanoform is ________ acid in nature than the chloroform. The missing word is

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Stronger

Weaker

Amphoteric

Neutral

The total number of orbitals possible for the quantum number n is

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n

n²

2n

2n²

Cannizzaro's reaction in not given by

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Formaldehyde

Acetaldehyde

Benzaldyhyde

Trimethylacetaldehyde

When fused PbBr₂is electrolyzed

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Bromine appears at he cathode

Lead is deposited at the cathode

Lead appears at the anode

None of these happens

Which of the following process is employed to convert alkyl halide into alcohol?

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Addition

Substitution

Dehydrohalogenation

Molecular rearrangement

Alkyle halides can be prepared by treating halogen acids with

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Ethane

Ethanol

Ethene and ethanol

Aldehyde

Acid rain is due to increase in atmospheric concentration of

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Ozone and dust

CO₂and CO

SO₃and CO

SO₂and NO₂

The process of osmosis was first discovered by

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Nollet

Pfeffer

Traube

Dutrochet

Monosaccharides are

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Aldoses

Ketoses

Either a and b

None of 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)

The process in which orbitals of different energies and shapes mix with each other to give equivalent hybrid orbitals is called

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Isomerization

polymerization

Hybridization

Resonance

A six membered ring containing one double bond called

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Cyclohexene

Cyclohexane

Cyclohexadiene

None

(A) is one molar NaCl solution and (b) is 1 molal NaCl solutin :

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A and B are of same strength.

A is more Concentrate than B.

b is more Concentrate than A.

None of above.

Enzymes catalyse all biological reactions occurring in the cell. What is true about an enzyme

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Enzyme is a small molecule

Enzyme is acidic in nature

Enzyme is a protein

Enzyme is a lipid

Which element has highest oxidation potential

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Li

Be

Ba

Ra

Generally ionization energy of atoms decreases by

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Decreases in atomic size

Increase in atomic size

Increase in nuclear charge

None of these

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

The formula of lime stone is

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CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

Which compound shows hydrogen bonding

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C₂H₆

C₂H₅CI

CH₃- O - CH₃

C₂H₅OH

C₆H₆Cl₆can be obtained from

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HCl and Benzene

Cl₂and Benzene and AlCl₃

Cl₂and Benzene in diffused light

NaOCl and Benzene

The function of salt bridge is :

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To increase movement onions.

To increase the emf of cell.

To decrease the temperate

To maintain electrical neutrality

Which gas is used for welding purposes

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Butane

Nitrogen

Methane

Acetylene

Chlorobenzene on heating with aqueous NH₃under pressure in the presence of cuprous chloride gives

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Benzamide

Nitrobenzene

Aniline

Chloroaminobenzene

When the rate of formation of reactants is equal to the rate of formation of products, this is known as

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Chemical reaction

Chemical equilibrium

Chemical kinetics

None

The nature of interparticle forces in benzene is

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Dipole-dipole interaction

Dispersion force

Ion-dipole interaction

H-bonding

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

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CH₃CH(OH)COOH

CH₃CH₂CH(OH)COOH

(CH₃)₂C(OH)COOH

CH₃CH₂CH₂COOH

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