Q5/10: What is the maximum number of spectral lines emitted when an electron drops from n=4 to the ground state in a hydrogen atom?
Anonymous Quiz
20%
3
30%
4
35%
6
12%
10
3%
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Q6/10: What is the approximate mass percentage of nitrogen in urea (NH2CONH2)?
Anonymous Quiz
28%
46.6%
38%
28.0%
27%
66.0%
5%
33.3%
3%
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👏2
Q7/10: Which of the following is defined as the loss of electrons?
Anonymous Quiz
46%
Oxidation
33%
Reduction
11%
Redox
5%
Hydrolysis
5%
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Q8/10: What is the oxidation number of oxygen in most of its compounds?
Anonymous Quiz
37%
+2
14%
-1
47%
-2
1%
-3
1%
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❤2
Q9/10: In the reaction Zn + Cu2+ -> Zn2+ + Cu, which species is oxidized?
Anonymous Quiz
40%
Zn
19%
Cu2+
30%
Zn2+
10%
Cu
0%
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Q10/10: Which of the following compounds is considered a strong oxidizing agent?
Anonymous Quiz
12%
H2 gas
24%
Na metal
60%
KMnO4
3%
Fe solid
1%
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👍1
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✨ Quiz Time! ✨
Answer today's quiz questions and test your knowledge.
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❤2
Q1/10: What is the common oxidation state of alkali metals in their compounds?
Anonymous Quiz
58%
+1
28%
+2
9%
-1
3%
0
2%
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❤1
Q2/10: The reaction 2H2 + O2 -> 2H2O is an example of which type of redox reaction?
Anonymous Quiz
18%
Decomposition
58%
Combination
8%
Displacement
15%
Disproportionation
0%
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Q3/10: Which of the following halogens is the strongest oxidizing agent?
Anonymous Quiz
38%
F2
35%
Cl2
19%
Br2
8%
I2
0%
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Q4/10: What is the oxidation state of hydrogen in active metal hydrides like NaH?
Anonymous Quiz
38%
+1
48%
-1
10%
0
4%
+2
0%
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Q5/10: What is the oxidation number of Cr in the dichromate ion, Cr2O7(2-)?
Anonymous Quiz
17%
+3
52%
+6
18%
+7
10%
+4
4%
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Q6/10: In a disproportionation reaction, which of the following statements is true?
Anonymous Quiz
44%
An element is both oxidized and reduced.
24%
Two elements combine together.
28%
A compound breaks down completely.
3%
Acids and bases neutralize.
1%
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❤2
Q7/10: Which highly electronegative element never exhibits a positive oxidation state?
Anonymous Quiz
21%
Oxygen
45%
Fluorine
31%
Chlorine
2%
Nitrogen
0%
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Q8/10: What is the oxidation number of Sulphur in H2SO4?
Anonymous Quiz
25%
+4
52%
+6
13%
+8
8%
-2
2%
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Q9/10: During a redox titration involving KMnO4, what acts as the indicator?
Anonymous Quiz
26%
Phenolphthalein
30%
Methyl orange
38%
KMnO4 itself
6%
Starch solution
0%
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Q10/10: Identify the reducing agent in the reaction: Fe2O3 + 3CO -> 2Fe + 3CO2.
Anonymous Quiz
31%
Fe2O3
33%
CO
25%
Fe
11%
CO2
0%
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Next quiz today at 21:00 (in 23h 51m)
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Next quiz today at 21:00 (in 23h 51m)
✨ Quiz Time! ✨
Answer today's quiz questions and test your knowledge.
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Good luck!