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Midterm Review Grade 12 SIS 2020-21

Total questions: 27

Worksheet time: 44mins

Name
Class
Date
1.

Smallest repeating unit of crystal lattice

a)

Lattice site

b)

Unit cell

c)

Crystal lattice

d)

Lattice point

2.

In a primitive unit cell atoms are present at the

a)

Corners & Centers of any 2 opposite sides

b)

Corners only

c)

Corners and Body Centre

d)

Corners & Centers of all faces

3.

Number of atoms per unit cell in a Face Centered Cubic lattice

a)

4

b)

1

c)

2

d)

6

4.
A saturated solution is one that....
a)
contains the maximum amount of dissolved solute.
b)
contains less solute than a saturated solution.
c)
contains more solute than a saturated solution.
d)
is the amount of a substance required to form a saturated solution.
5.
What is the molarity of a 2 liter solution containing 5 moles of NaCl?
a)
2.5
b)
0.4
c)
2.5 moles/liter
d)
10 moles/liter
6.

Find the boiling point of a solution containing 15.0 g sucrose (molar mass = 342.3g/mol), in 100g of water. (Kb = 0.512 oC/m)

a)

100.2

b)

99.8

c)

0.2

d)

-0.2

7.

Given their standard reduction potentials, which of the species is going to be oxidized?

Cu2+/Cu = 0.34V

Zn2+/Zn = -0.76V

a)

Cu

b)

Zn

c)

CuSO4

d)

ZnSO4

8.

What reaction occurs at the anode?

Ag+/Ag = 0.80V

Ni2+/Ni = -0.25V

a)

Ag+ + e- →Ag

b)

Ag → Ag+ + e-

c)

Ni2+ + 2e- → Ni

d)

Ni → Ni2+ + 2e-

9.
Which are examples of reduction?
a)
I and II
b)
I and III
c)
II and III
d)
I, II and III
10.
Reaction rate means...
a)
amount of product formed
b)
speed of reaction
c)
concentration of reacting particles
d)
combining reactants with products
11.
What type of reaction is this?
a)
Endothermic
b)
Exothermic
12.
A possible rate law for a third overall order of a reaction is __________________
a)
Rate = k [A]2[B]2
b)
Rate = k [A][B]3
c)
Rate = k [A]3 [B]
d)
Rate = k [A]2[B]
13.

Name the effect

a)

brownian

b)

tyndall

c)

suspension

d)

colloidal

14.

Milk is an example of a

a)

solution

b)

colloid

c)

suspension

d)

solid

15.

The major factor contributing towards the stability of a lyophobic sol is the —— on the colloidal particles

(a)  

16.

Nitrogen is chemically inert. Why?

a)

Due to presence of double bond require more energy to break

b)

Due to presence of triple bond require more energy to break

c)

Triple bond requires less energy to break

d)

None of the above

17.

5.The shape of I F 7

a)

T shape

b)

trigonal bipyramidal

c)

linear

d)

pentagonal bipyramidal

18.
Which one of these gases gives you a high voice when you inhale it?
a)
Helum
b)
Krypton
c)
Neon
d)
Helium
19.
3d orbitals are degenerate. What does it means?
a)
All 3d orbitals are in same order
b)
All 3d orbitals have different electron arrangement
c)
All 3d orbitals are in the same energy level
d)
All 3d orbitals have the same shape
20.
Cu2+ solution in the presence of water is blue. Why?
a)
Splitting of 3d orbital and electron can be easily excited
b)
Blue light is aborbed to excite elec to higher energy level
c)
Blue light is emitted when elec move to lower energy level
d)
3d orbital are partially filled and electrons can be excited
21.

The transition metals form a large number of complex

compounds. This is due to

a)

smaller sizes of the metal ions

b)

high ionic charges of the metal ions

c)

availability of d orbitals

d)

All the above

22.

1. The donor sites of (EDTA)4- are ?

a)

O atoms only

b)

N atoms only

c)

Two N and four O atoms

d)

Three N and three O atoms

23.

Among the following ions which one has the highest paramagnetism ?

a)

[Cr(H2O)6]+3

b)

[Fe(H2O)6]+2

c)

[Cu(H2O)6]+2

d)

[Zn(H2O)6]+2

24.

The IUPAC name of the compound [Cu (NH3)4](NO3)2 is :

a)

Cuprammonium nitrate

b)

Tetraammine copper (II) dinitrate

c)

Tetraammine copper (II) nitrate

d)

Tetraammine copper (III) dinitrate

25.

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is

a)

Electrophilic elimination reaction

b)

Electrophilic substitution reaction

c)

Free radical addition reaction

d)

Nucleophilic substitution reaction

26.

Which of the following is an example of vic-dihalide?

a)

Dichloromethane

b)

1,2-dichloroethane

c)

Ethylidene chloride

d)

Allyl chloride

27.

A primary alkyl halide would prefer to undergo _____________.

a)

SN1 reaction

b)

SN2 reaction

c)

α–Elimination

d)

Racemisation

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