Question # 1

Molecules of High molecular weight usually greater than 10,000 are called:

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Macro molecules

Mega molecules

Poly molecules

Gega molecules

Alkanes are generally not reactive towards acids, alkalis, oxidation or reuducing agents. They however undergo some reactions, which one is the reaction undergone by alkanes

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Elemination

Addition

Free radical substitution

Nucleophilic substation

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1st order

2nd order

Zero order

3rd order

Phosphide ion has the electronic structure similar to that of

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Nitride ion

Fluoride ion

Sodium ion

Chloride ion

A limiting reactant is the one which

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Is taken in lesser quantity in grams as compared to other reactants

Is taken in lesser quantity in volume as compared to other reactants

Gives the maximum amount of the product which is required

Gives the minimum amount of the product under consideration

A common industrial solvent is a mixture of propanone; CH₃COCH₃, and pentyl ethanoate CH₃CO₂(CH₂)₄CH₃. Which reagent would have no effect on this solvent

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Na_(s)

NaBH₄

NaOH_(aq)

2,4-dinitrophenylhydrazine reagent

A pseudo uni-molecular reaction has order of reaction :

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3

2

1

0

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

How many molecules of chlorine adds in benzene in the presence of sunlight

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One

Two

Three

Four

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

CO+ is an example of

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Stable molecule

Anionic molecule ion

Cationic molecular ion

Free radical

Pauli's principle is applicable to

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Degenerate orbits

Two electrons in the same orbital

One electron

None

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Electrophilic substitution

Free radical reduction

Isomerisation

Nucleophilic substitution

Which of the substances Na, Hg, S Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because:

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They have an electrophilic carbon

They have an electrophilic carbon and good living gorup

They have an electrophilic carbon and bad living group

They have an nucleophilic carbon and good living gorup

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

Among O, C, F, Cl, Br, the correct order of increasing radii is

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F O C Cl Br

F C O Cl Br

F Cl Br O C

C O F Cl Br

Number of moles of the solute dissolved per dm³of the solution is knows as

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Molarity

Formality

%age

None of these

Carboxylic acids are more acidic than pehnol and alcohol because of

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Intermolecular hydrogen bonding

Formation of dimmers

Highly acidic hydrogen

Resonance stabilization of their conjugate base

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

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s

p

d

f

Identify the compound which has a bond angle of 109.5°

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Ethyne

Ethere

Methane

Benzene

Which of the following is non-typical transition element?

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Cr

Mn

Zn

Fe

The solid remained on filter paper during filtration is called the

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Substance

Residue

Undue

Filtrate

Which of the following synthetic phosphorous fertilizers is marked as super phosphate

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Calcium dihydrogen phosphate

Appetite

Calcium phosphate

Wavellite

Which class of compound is more reactive

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Alkane

Alkene

Alkyne

None

Cannizzzaro's reaction is not given by:

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Formaldehyde

Acetaldehyde

Benzaldehyde

Trimethyl

Which of the following is an electrophile

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Bromine

KBr

NH₃

Benzene

Without proper suction,filtration is:

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Rapid process

Fague process

Slow process

Useless process

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

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2-

4

1

6

Substituted phenyl groups are called

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acyl groups

phenyl groups

Aryl groups

Alkyle groups

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