Chemistry · Question 861
Which electrolyte produces fewer ions in water?
- Ca(OH)₂
- H₂SO₄
- NaOH
- NaCl
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Correct answer: A
Ca(OH)₂
Ca(OH)₂ is the answer marked in the supplied practice source.
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Chemistry · Question 862
What is the oxidation number of oxygen in peroxides?
- +2
- -1
- -2
- Zero
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Correct answer: B
-1
-1 is the answer marked in the supplied practice source.
Chemistry · Question 863
What is the anode of Down’s cell made of?
- Copper
- Steel
- Zinc
- Graphite
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Correct answer: D
Graphite
Graphite is the answer marked in the supplied practice source.
Chemistry · Question 864
What is the oxidation number of oxygen in OF₂?
- +1
- -1
- +2
- -2
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Correct answer: C
+2
+2 is the answer marked in the supplied practice source.
Chemistry · Question 865
What is the oxidation state of sulfur in H₂SO₄?
- +5
- -6
- +6
- +3
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Correct answer: C
+6
+6 is the answer marked in the supplied practice source.
Chemistry · Question 866
In which cell does spontaneous chemical reaction take place?
- Galvanic cell
- Nelson’s cell
- Down’s cell
- Electrolytic cell
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Correct answer: A
Galvanic cell
Galvanic cell is the answer marked in the supplied practice source.
Chemistry · Question 867
How many types of electrochemical cells are there?
- 3
- 4
- 2
- 5
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Correct answer: C
2
2 is the answer marked in the supplied practice source.
Chemistry · Question 868
What is the oxidation number of hydrogen in HCl?
- -1
- +1
- 0
- -2
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Correct answer: B
+1
+1 is the answer marked in the supplied practice source.
Chemistry · Question 869
What is the oxidation number of hydrogen in metal hydrides?
- -2
- +1
- -1
- 0
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Correct answer: C
-1
-1 is the answer marked in the supplied practice source.
Chemistry · Question 870
What is the process of coating iron with a thin layer of zinc called?
- Reducing
- Oxidizing
- Alloying
- Galvanizing
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Correct answer: D
Galvanizing
Galvanizing is the answer marked in the supplied practice source.