Question # 1

Which of the following is not a fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Which one of the following compounds does not have the empirical formula CH₂O?

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Ethanoic acid, CH₃CO₂H

Ethanol, CH₃CH₂OH

Glucose, C₆H₁₂O₆

Methanal, HCHO

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Aqueous bromine

Dilute HNO₃

Dilute HCI

CH₃COCI

In a group, the ionization energy

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Increase

Decreases

Remain constant

First increases then decreases

Which of the following is an inert gas?

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H₂

O₂

N₂

Argon

Which of these always applies to a nucleophile

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It attacks a double bond

It has a lone pair of electrons

It is single atom

It is negatively charged

The elements of f-block are also known as

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Inner-transition

Outer transition

Normal elements

Alkaline earth metals

A one thousand dm³sample of water contains one gram of iron (iii) ions what is the concentration in parts per million of Fe^3f(eq) in parts per million

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0.001

0.01

0.1

1.0

Dehydration of an alcohol at 180°

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Alkene

Ether

Ester

An hydride

Light emitted from a source has its wave length 500nm, then its wave number will be

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2 x 10⁶m^-1

2 x 10⁷m^-1

5 x 10⁸m^-1

5 x 10⁹m^-1

Which one of the following is a colligative property?

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Surface tension

Osmotic pressure

Viscosity

Refractive index

A buffer of a 0.09 molar acetic acid and 0.11 molar sodium acetate has pH = 4.83. If 0.01 mole NaOH in 1 dm³of the buffer solution is added, then pH of the buffer becomes

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4.74

4.92

5.0

4.0

Which of the following hydrides has the lowest boiling point?

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H₂O

H₂S

H₂S3

H₂Te

It is common observation that rates of chemical reactions differ :

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Greatly.

A little bit.

Moderately.

Heat of neutralization of weak acid and a strong base is

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13.7 Kcal

Less than 13.7 Kcal

Greater than 13.7 Kcal

None of these

In electronic watches or electronic calculators the tiny batteries used are

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Alkaline battery

NICAD battery

Fuel cell

Silver oxide battery

Mustard gas is a :

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Gas

Liquid

Solid

High boiling point

Which of the following human activities are contaminating surface and ground waters

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Pesticides

Septic tanks

Petroleum and natural gas production

All of these

Acetic Acid is obtained from:

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Red out

Vinegar

Butter

Milk

The structure of ICI₂is

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Trigonal

Trigonal bipyramidal

Octahedral

Square planar

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

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A ketone

An aldehyde

An ether

Water

The trade name of polytetrafluoroethylene (PTFE) is

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Teflon

PVC

Terelene

Polyester

Which gasses are produced from landfills

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NH₃

H₂S

N₂

All of these

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

The colour of ppts formed by Fehling's test is

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Brick red

Red

Yellow

Orange

The sun of all the energies of atoms, molecule, ion, within system is called

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Enthalpy

K.E. of the system

Internal energy

None

The equivalent conductivity of 0.1 M week acid is 100 times less than at infinite dilution. The degree of dissociation is

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100

10

0.01

0.001

Catenation is a process in which carbon shows the properties of making

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Multiple bonds

Hybridization

Long chains or rings of carbon atom

Showing isomerism

In CH₄, all the H-C-H bond angles are

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120°

107°

109°

109.5°

An orbital can accommodate maximum two electrons with opposite spins according to

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Heisenberg's principle

Aufbau principle

Hund's srule

Pauli exclusion principle

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