5 In the following reaction which element got oxidized : 3HNO3(aq) + Al(s) → Al3+ + 3NO2(g) + 3OH- a. Aluminum ( Al) b. Hydrogen (H) c. Nitrogen (N) d. Oxygen (O) 6 One of the following is NOT a strong acid : a. H2SO4 b. HCl c. HNO3 d. HCN 8 The pressure of a gas in flask is 430.2 mmHg, what is the pressure in atmosphere (atm) ? ( 1atm = 760 mmHg) a. 0.9324 atm b. 1.073 atm c. 619400 atm d. 0.5660 atm 9 The theoretical yield of product is the maximum amount of product that can be obtained from given amounts of reactants Select one: True False 10 The following reaction is classified as …………….. reaction CaO(s) + H2O(l) → Ca(OH)2(s) a. Combination reaction b. Decomposition reaction c. Displacement reaction d. Combustion reaction 11 The metals of group 1 in the periodic table are the strongest reducing agents Select one: True False 12 What is the molecular formula of a compound, If its empirical formula C2H6As (M.wt 105.0 g/mole) and its molecular weight = 210.0 g/mole? a. C4H12As2 b.
5 In the following reaction which element got oxidized : 3HNO3(aq) + Al(s) → Al3+ + 3NO2(g) + 3OH- a. Aluminum ( Al) b. Hydrogen (H) c. Nitrogen (N) d. Oxygen (O) 6 One of the following is NOT a strong acid : a. H2SO4 b. HCl c. HNO3 d. HCN 8 The pressure of a gas in flask is 430.2 mmHg, what is the pressure in atmosphere (atm) ? ( 1atm = 760 mmHg) a. 0.9324 atm b. 1.073 atm c. 619400 atm d. 0.5660 atm 9 The theoretical yield of product is the maximum amount of product that can be obtained from given amounts of reactants Select one: True False 10 The following reaction is classified as …………….. reaction CaO(s) + H2O(l) → Ca(OH)2(s) a. Combination reaction b. Decomposition reaction c. Displacement reaction d. Combustion reaction 11 The metals of group 1 in the periodic table are the strongest reducing agents Select one: True False 12 What is the molecular formula of a compound, If its empirical formula C2H6As (M.wt 105.0 g/mole) and its molecular weight = 210.0 g/mole? a. C4H12As2 b.
5 In the following reaction which element got oxidized : 3HNO3(aq) + Al(s) → Al3+ + 3NO2(g) + 3OH- a. Aluminum ( Al) b. Hydrogen (H) c. Nitrogen (N) d. Oxygen (O) 6 One of the following is NOT a strong acid : a. H2SO4 b. HCl c. HNO3 d. HCN 8 The pressure of a gas in flask is 430.2 mmHg, what is the pressure in atmosphere (atm) ? ( 1atm = 760 mmHg) a. 0.9324 atm b. 1.073 atm c. 619400 atm d. 0.5660 atm 9 The theoretical yield of product is the maximum amount of product that can be obtained from given amounts of reactants Select one: True False 10 The following reaction is classified as …………….. reaction CaO(s) + H2O(l) → Ca(OH)2(s) a. Combination reaction b. Decomposition reaction c. Displacement reaction d. Combustion reaction 11 The metals of group 1 in the periodic table are the strongest reducing agents Select one: True False 12 What is the molecular formula of a compound, If its empirical formula C2H6As (M.wt 105.0 g/mole) and its molecular weight = 210.0 g/mole? a. C4H12As2 b.
In the following reaction which element got oxidized :
3HNO3(aq) + Al(s) → Al3+ + 3NO2(g) + 3OH-
a.
Aluminum ( Al)
b.
Hydrogen (H)
c.
Nitrogen (N)
d.
Oxygen (O)
6
One of the following is NOT a strong acid :
a.
H2SO4
b.
HCl
c.
HNO3
d.
HCN
8
The pressure of a gas in flask is 430.2 mmHg, what is the pressure in atmosphere (atm) ? ( 1atm = 760 mmHg)
a.
0.9324 atm
b.
1.073 atm
c.
619400 atm
d.
0.5660 atm
9
The theoretical yield of product is the maximum amount of product that can be obtained from given amounts of reactants
Select one:
True
False
10
The following reaction is classified as …………….. reaction CaO(s) + H2O(l) → Ca(OH)2(s)
a.
Combination reaction
b.
Decomposition reaction
c.
Displacement reaction
d.
Combustion reaction
11
The metals of group 1 in the periodic table are the strongest reducing agents
Select one:
True
False
12
What is the molecular formula of a compound, If its empirical formula C2H6As (M.wt 105.0 g/mole) and its molecular weight = 210.0 g/mole?
a.
C4H12As2
b.
C2H6As
c.
C6H6O6
d.
C6H12O6
13
The hydroxides of Group IA and IIA elements, except for beryllium hydroxide, are weak bases
Select one:
True
False
14
A precipitate is an insoluble solid compound formed during a chemical reaction in solution
Select one:
True
False
15
In an experiment, you fill a heavy-walled 5.00 L flask with methane gas. If the flask contains 4.67 mole of methane at 292 K, what is the gas pressure?
a.
22.4 atm
b.
0.00657 atm
c.
None of them
d.
258 atm
16
The reaction of iron ore with carbon follows the equation:
2 Fe2O3 + 3 C → 4 Fe + 3 CO2
If 200.0 g of Fe2O3 were reacted with 300.0 g of C, How many grams of Fe can be produced (theoretical yield )? M.wt ( Fe2O3=159.6 u , C = 12.0 u, Fe=55.8u )
a.
139.8 g
b.
4.36 g
c.
5.73 g
d.
1860 g
18
The pressure exerted by a gas at constant volume is inversely proportional to its absolute temperature.
Select one:
True
False
19
When Carbonates react with acids form SO2, sulfur dioxide gas
Select one:
True
False
20
By the half-reaction method the balanced equation of the following redox reaction is
Fe+3(aq)+ Mg(s) → Fe(s) + Mg+2(aq)
a.
Fe+3(aq)+ 3 e → Fe(s)
b.
Fe+3(aq)+ Mg(s) → Fe(s) + Mg+2 (aq)
c.
3 Fe+3(aq)+ 2Mg(s) → 3Fe(s) + 2Mg+2 (aq)
d.
2Fe+3(aq)+ 3Mg(s) → 2Fe(s) + 3Mg+2(aq)
21
Important units of pressure :
a.
All of them
b.
Atmosphere ( atm)
c.
mm Hg or torr
d.
Pascal (Pa)
22
…………as the species (molecule or ion) that donates a proton (H+)
a.
The Arrhenius acid
b.
The Brønsted-Lowry acid
c.
The Brønsted-Lowry base
d.
The Arrhenius base
23
a 5.20 L sample of neon gas had a pressure of 0. 412 atm. What would be the volume of this gas if the pressure were increased to 1.63 atm at constant temperature?
a.
12.9 L
b.
1.31 L
c.
2.06 L
d.
2.95 L
24
A 5.43 gram sample of an unknown gas occupied a volume of 2.50 L at 25°C and a pressure of 2.63 atm. Calculate its molecular mass
a.
39.3 g/mole
b.
84.3 g/mole
c.
20.1 g/mole
d.
1.69 g /mole
25
A decomposition reaction is a reaction in which two substances combine to form a third substance
Select one:
True
False
26
6.2 moles of H2SO4 are dissolved in 1.5 L of water. What is the Molarity of the H2SO4 solution ?
a.
4.1 M
b.
0.24 M
c.
9.3 M
d.
None of them
27
According to Kinetic Theory of an Ideal Gas there is inherent attractive and repulsive forces between particles.
Select one:
True
False
28
A hydrometer is a device for measuring the pressure of the atmosphere
Select one:
True
False
29
Electrolytes are substances that dissolve in water to give an electrically conducting solution.
Select one:
True
False
30
Element (Y) effuses 2.2 times faster than Element (X). M.wt X=4.0 g/mole , M.wt Y = 20.2 g/mole
Select one:
True
False
31
Effusion is the transfer of a gas through a membrane or orifice .
Select one:
True
False
32
What is the oxidation number Ga in Ga(OH)3 ?
a.
+1
b.
+3
c.
-3
d.
-1
Definition Definition Chemical reactions involving both oxidation and reduction processes. During a redox reaction, electron transfer takes place in such a way that one chemical compound gets reduced and the other gets oxidized.
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