Question # 1

The gain of electron is known as.

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Oxidation

Reduction

Dehydration

Dehydrogenation

Which of the following represents electronic configuration of the most electropositive elements

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He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

The molecules of CO2 i dry ice form the.

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Ionic crystals

Molecular crystals

Amorphous

Covalent crystals

Which molecules is 100% covalent

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H2

H2O

HF

NH3

Maximum number of electrons in f-subshell is.

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2

6

10

14

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

The pressure of oxygen inside the bomb calorimeter is.

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100 atm

50 atm

25 atm

20 atm

The boiling point of glycerin at one atm is.

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280 ^oC

290 ^oC

100 ^oC

110 ^oC

Those elements whose electronegativities are 1.2 and 3.2, react to form

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Ionic bond

Covalent bond

Gaseous substance

Definiting a liquid substance

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

Which of the following elements in its crystalline form will have the lowest enthalpy change of vaporization

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Chlorine

Argon

Phosphorus

Silicon

Solvent extraction is an equilibrium process and it is controlled by

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Law of mass action

The amount of solvent used

Distribution law

The amount of solute

Which substance have delta E = Delta H and no pressure - volume work.

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Liquids only

Solids only

Gases only

Liquids and solids

In which , case particles are separated from each other.

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Fusion

Condensation

Neutralizations

Vaporization

At constant volume of a system remains constant and the heat is absorbed by the system, them amount of heat absorbed is called

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Enthaply change of the system

Internal energy change of the system

Total enthalphy of the system

Total internal energy of the system

How many moles of CO are present having 12.04 x 10²³molecules of CO2.

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0.5 mol

1.0 mol

1,5 mol

2.0 mol

Which is not use of liquid crystals.

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Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

Which of the following species has unpaired electrons in anti bonding molecular orbitals

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O2

N2

B2

F2

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Chemistry Fsc Part 1 Online Test MCQs With Answers

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