MDCAT Chemistry Chapter 5 MCQ Test With Answer for (Chemical Energetics)

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MCQ's Test For MDCAT Chemistry Chapter 5 Chemical Energenitcs Online Test

Try The MCQ's Test For MDCAT Chemistry Chapter 5 Chemical Energenitcs Online Test

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MDCAT Chemistry Chapter 5 Chemical Energenitcs Online Test

00:00
Question # 1

Structure of CrO4(-2) is'

Question # 2

Hardness of diamond is attributed to the

Question # 3

Substance that does not show the process of sublimation is

Question # 4

The existence of an element in more than one form is called

Question # 5

Which property is associated with ionic solids?

Question # 6

Crystals can be classified into

Question # 7

In diamond, which hybridization is there?

Question # 8

K2SO4, and K2Cr2O4, are isomorphous solids and exist in

Question # 9

Which impurity makes the shape of NaCl crystal needle like

Question # 10

The electrical conductivity of the metals decreases with the increasing temperature. This is because

Question # 11

In diamond, the carbon atoms are arranged in a

Question # 12

The transition temperature of tin is

Question # 13

In most of the cases the molecular crystals are

Question # 14

Amorphous means

Question # 15

The nature of crystal of diamond is

Question # 16

Which among the following will show anisotropy?

Question # 17

LiF is a crystalline substance and has

Question # 18

One of the following is a ionic solid. Which is that?

Question # 19

in diamond a unit cell is tetrahedral and averall crystai structure is

Question # 20

Some of crystals are good conductors of heat and electricity, they may be

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Prepare Complete Set Wise MDCAT Chemistry Chapter 5 Chemical Energenitcs Online Test MCQs Online With Answers


In this topic,Student should be able to:

a) Understand concept of energy changes during chemical reactions with examples of exothermic and endothermic reactions.

b) Explain and use the terms:

i) Enthalpy change of reaction and standard conditions, with particular reference to: formation; combustion; solution; neutralization and atomization.
ii) Bond energy (ΔH positive, i.e. bond breaking).
iii) Lattice energy (ΔH negative, i.e. gaseous ions to solid lattice).

c) Find heat of reactions/neutralization from experimental results using mathematical relationship i.e. ∆H=mc∆T

d) Explain, in qualitative terms, the effect of ionic charge and of ionic radius on the numerical magnitude of lattice energy

e) Apply Hess’s Law to construct simple energy cycles, and carry out calculations involving such cycles and relevant energy terms, with particular reference to:

i) Determining enthalpy changes that cannot be found by direct experiment, e.g. an enthalpy change of formation from enthalpy change of combustion.
ii) Born-Haber cycle of NaCl (including ionization energy and electron affinity).

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Sr.# Question Answer
1 The molecules of CO2, in dry ice form the
A. covalent crystals
B. molecular crystals
C. none of these crystals
D. ionic crystals
2 Polymorphism is shown by AgNO3. Which one of the following options is true for AgNO3?
A. Orthorhombic and rhombohedral
B. Cubic and orthorhombic
C. Cubic and tetragonal
D. Monoclinic and hexagonal
3 NaCI has face centered cubic structure. The Na ion at the face of the unit cell is shared by
A. 2-unit cells
B. 4-units cells
C. only one unit cell
D. 8-unit cells
4 Crystals can be classified into
A. 7 crystal systems
B. 4 crystal systems
C. 3 crystal systems
D. 14 crystal systems
5 The nature of crystal of diamond is
A. metallic
B. molecular
C. covalent
D. ionic
6 LiF is a crystalline substance and has
A. ionic crystal
B. metallic crystal
C. covalent crystal
D. molecular crystal
7 One of the following is a ionic solid. Which is that?
A. Fe
B. KBr
C. Diamond
D. Cr
8 The examples of a hexagonal system is
A. sugar
B. graphite(a=b not equal to c) {Alpha =beta. not equal to gamma}
C. sulphur
D. diamond
9 What is the co-ordination number of face centered cubic structure?
A. 12
B. 8
C. 6
D. 10
10 Plastics are amorphous solids and
A. have sharp melting points
B. undergo clean cleavage when cut with knife
C. do not undergo clean cleavage
D. possess orderly arrangement over long distances
11 K2SO4, and K2Cr2O4, are isomorphous solids and exist in
A. cubic form
B. orthorhombic form
C. trigonal form
D. tetragonal
12 The existence of an element in more than one form is called
A. allotropy
B. isomorphism
C. polymorphism
D. isotropy
13 Which property is associated with ionic solids?
A. Solubility in polar solvents
B. Low melting points
C. Good conductivity in solid state
D. High vapour pressure
14 An element from the given below exists as discrete small molecules in the solid state. Which is that?
A. Sodium
B. Silicon
C. lodine
D. lron
15 lonic solids don't conduct the electrical current because
A. ion do not have translatory motion
B. free electrons are less
C. the coordination number of the ion is very high
D. strong covalent bonds are present in their structure
16 The hexagonal closed packing is associated with
A. Ag, Cu, Au
B. Zn, Cd, Hg
C. Li, Na, K
D. NaCl, KBr
17 Which attractive forces cause molecular solids to be formed?
A. lonic
B. Metallic
C. Covalent
D. van der Waals
18 The number of Cl- ions per unit cell of NaCl are
A. 6
B. 4
C. 2
D. 8
19 Amorphous means
A. arranged
B. ordered
C. shaped
D. shapeles (no arrangements)
20 The transition temperature of tin is
A. 95.5 C°
B. 13.2 C°
C. 13.2°C
D. 128.5°

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