Worksheets3 Days workshop-Demo On line Quiz
Total questions: 25
Worksheet time: 30mins
Name
Class
Date
1.
A sample of benzene (C6H6) is burnt in excess oxygen, and produces 67.2 L carbon dioxide at STP. What was the mass of benzene in the sample?
a)
11.2 g
b)
39.0 g
c)
44.0 g
d)
78.0
2.
Hydrogen reacts with chlorine according to the equation: H2(g) + Cl2(g) → 2 HCl(g) If 0.05 L of hydrogen gas reacts completely with chlorine gas, how much hydrogen chloride is produced (at STP)?
a)
0.025 L
b)
0.05 L
c)
0.10 L
d)
0.224 L
3.
a)
2,3-diethyl-3-methyloctane
b)
4-ethyl-3,4-dimethylnonane
c)
3-methyl-2,3-diethyloctane
d)
2,3-diethyl-3-methylheptane
4.
Concentration of Ag+ ion in a saturated solution of Ag2C2O4 is 2.2 x 10 -4 mol L-1. Solubility product of Ag2C2O4 is
a)
2.66 x 10 -12
b)
5.3 x 10-12
c)
2.42 x10-8
d)
4.5 x 10 -11
5.
What is happening as a solid turns into a liquid or gas?
a)
Thermal energy is released and atoms will move faster
b)
Thermal energy is being gained and atoms will move slower
c)
Thermal energy is being gained and atoms will move faster
d)
Thermal energy is being released and atom will move slower
6.
The species having bond angle of 1200 is
a)
ClF3
b)
NCl3
c)
BCl3
d)
PH3
7.
For a given reaction, ∆H = 35.5 kJ mol-1 and ∆S = 83.6 J K-1 mol-1. The reactions is spontaneous at (assume that ∆H and ∆S do not vary with temperature.)
a)
T > 425 K
b)
All temperatures
c)
T > 298 K
d)
T < 425 K
8.
Which of the following statement is not correct?
a)
The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium.
b)
Enzymes catalyse only biochemical reactions.
c)
Coenzymes increase the catalytic activity of enzymes.
d)
Catalyst does not initiate any reaction.
9.
Which of the following reaction is appropriate for converting acetamide to methanamide?
a)
Hoffman bromamide reaction
b)
Stephen reaction
c)
Gabriel phthalimide reaction
d)
Carbylamine reaction
10.
The coordination number and the oxidation state of the element ‘M’ in the complex [M(en)2(C2O4)]NO2 are respectively
a)
6 and 2
b)
4 and 2
c)
6 and 3
d)
4 and 3
11.
Square planar complex of the type MABCD (where A, B, C and D are unidentate ligand) shows following set of isomers
a)
Two cis and one trans
b)
Two cis and one trans
c)
Two cis and two trans
d)
Three cis and one trans
12.
At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?
a)
60 ºC
b)
30 ºC
c)
50 ºC
d)
83 ºC
13.
At approximately what temperature does the solubility of sodium chloride, NaCl, match the solubility of potassium dichromate, K2Cr2O7?
a)
60 ºC
b)
30 ºC
c)
50 ºC
d)
83 ºC
14.
Which of the following substances increase solubility at the slowest rate with increasing temperature?
a)
SO2
b)
NaCl
c)
KCl
d)
KNO3
15.
2H2 + O2 → 2H2O
How many moles of water can be produced if 8 moles H2 reacts with 8 moles O2?
How many moles of water can be produced if 8 moles H2 reacts with 8 moles O2?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
16.
The value of the equilibrium constant, K, for a reaction is found to have the same value as K for its reverse reaction. If this is the case, it means that:
a)
The numerical value of K must be 1
b)
The reaction is not actually reversible
c)
The rate of the forward reaction and back reaction is always equal
d)
The number of mole of products must equal the number of mole of reactants
17.
What letter represents the activation energy?
a)
A
b)
B
c)
C
d)
D
18.
What is the density of piece A?
a)
4.5 g/cm3
b)
5 g/cm3
c)
9 g/cm3
d)
18 g/cm3
19.
Substance or Mixture?
a)
Substance
b)
Mixture
20.
Substance or Mixture?
a)
Substance
b)
Mixture
21.
The shape of XeF4 is
a)
tetrahedral
b)
triangularpyramidal
c)
square planer
d)
none of these
22.
The hybridisation in XeOF4 is
a)
sp2
b)
sp3
c)
sp3d
d)
sp3d2
23.
Sc3+ solution in the presence of water is colorless. Why?
a)
Presence of ligands cause the splitting of 3d orbital.
b)
There is no splitting of 3d orbitals
c)
There is no electrons to be excited
d)
Energy level is too high for electron to reach
24.
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
25.
La and Ac, while in the f block, actually place their last electron in a ____.
a)
d1
b)
s1
c)
p1
d)
f1
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