Question # 1

Carboxylic acids having carboxyl group one is called:

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Mono carboxylic acid

Di-carboxylic acid

Teri-carboxylic acid

Tetra carboxylic acid

NaCI is completely ionized in water due to the presence of:

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dipole-dipole forces

ion- dipole forces

H-bonding

London dispersimforces

How temperature affects the electrical conductivity of metals?

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Does not change at all

Decreases with increasing temperature

Increases with increasing temperature

Decreases with decreasing temperature

Which gas molecules escape through a hole of molecular dimension this phenomenon is called

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diffusion

mixing

effusion

flowing of gas

The kinetic energy of 4 moles of nitrogen gas at 127°C is? cals.(R = 2 cal mol^-1 K^-1)

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4400

3200

4800

1524

The system in which all the three axes are unequal and are at righ angle to each other is called

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cubic

hexagonal

orthorhombic

tetragonal

What is the most common catalyst used in hydrogenation of oils?

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cobalt

nickel

tungsten

copper

The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from

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2 ppm - 6 ppm

2 ppm - 4 ppm

4 ppm - 8 ppm

2 ppm - 3 ppm

In which molecule. all atoms are coplanar?

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CH4

BF3

NH3

PH3

At STP,a container has 1 mole of Ar,2 moles of CO₂,3 moles of O₂ and 4 moles of N₂.Without changing the total pressure if one mole of O₂ is removed,the partial pressure of O₂

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Is changed by about 26%

Is halved

Is unchanged

Change by 33%

All the following have crystals except:

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potassium bromide

diamond

cadmium sulphide

sodium chloride

The simplest separating unit of a polymer is called:

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Monomer

Dimer

Trimmer

Macromer

Peat before conversion to bituminous coal is converted to

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Lignite

Anthracite

Asphalt

None

Which property depends on the state of system

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Enthaply

Free energy

Entropy

All these

The total number of rare earth elements is

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8

32

14

10

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

A reaction in which heat is given out is

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An endothermic reaction

An exothermic reaction

A thermochemical reaction

An energetic reaction

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

Organic synthetic or man made polymers are plastics, rubber and fibre. Which is not a synthetic polymer

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Silk

Polyester

Polyvinyl chloride

Nylon

An aqueous solution is neutral when its

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pH = 14

pH = zero

pH = 7

Kw = 10^-7

Marble is chemically

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CaCl₂

CaCO₃

Na₂CO₃

NaHCO₃

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Iodine can oxidise iron

Bromine can oxidise iron

Iodine can oxidise bromine

Iron can oxidise bromine

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