Class 11 Chem - Redox Reactions - MERIT YARD
1 / 40The classical definition of addition of oxygen to a substance is called:
2 / 40The classical definition of removal of hydrogen from a substance is called:
3 / 40The classical definition of addition of hydrogen to a substance is called:
4 / 40The classical definition of removal of oxygen from a substance is called:
5 / 40According to the modern electronic concept, the loss of electrons by a species is termed as:
6 / 40According to the modern electronic concept, the gain of electrons by a species is termed as:
7 / 40The standard oxidation number of an element in its free (uncombined) state is always:
8 / 40The oxidation number of Group 1 (Alkali metals) in all their compounds is strictly:
9 / 40The oxidation number of Group 2 (Alkaline earth metals) in all their compounds is strictly:
10 / 40The standard oxidation number of Hydrogen in most of its chemical compounds is:
11 / 40The oxidation number of Hydrogen when it reacts with active metals (like \( NaH \)) is:
12 / 40The standard oxidation number of Oxygen in most of its typical compounds is:
13 / 40The oxidation number of Oxygen in peroxides (like \( H_2O_2 \)) is precisely:
14 / 40The oxidation number of Fluorine in all of its compounds is strictly:
15 / 40The algebraic sum of the oxidation numbers of all atoms in a neutral molecule is always:
16 / 40The algebraic sum of oxidation numbers of all atoms in a polyatomic ion equals the:
17 / 40A chemical substance that readily undergoes oxidation itself acts as a strong:
18 / 40A chemical substance that readily undergoes reduction itself acts as an:
19 / 40Calculate the exact oxidation number of Carbon (C) in
\( CO_2 \).
\( CO_2 \).
20 / 40Calculate the exact oxidation number of Sulfur (S) in
\( H_2SO_4 \).
\( H_2SO_4 \).
21 / 40Calculate the exact oxidation number of Manganese (Mn) in
\( KMnO_4 \).
\( KMnO_4 \).
22 / 40Calculate the exact oxidation number of Chromium (Cr) in
\( K_2Cr_2O_7 \).
\( K_2Cr_2O_7 \).
23 / 40Calculate the exact oxidation number of Phosphorus (P) in
\( H_3PO_4 \).
\( H_3PO_4 \).
24 / 40Calculate the exact oxidation number of Nitrogen (N) in
\( HNO_3 \).
\( HNO_3 \).
25 / 40Calculate the exact oxidation number of Chlorine (Cl) in
\( HClO_4 \).
\( HClO_4 \).
26 / 40In the reaction \( Zn + Cu^{2+} \rightarrow Zn^{2+} + Cu \), the metal Zinc (Zn) is strictly:
27 / 40In the reaction \( Zn + Cu^{2+} \rightarrow Zn^{2+} + Cu \), the Copper ion \( (Cu^{2+}) \) is strictly:
28 / 40A device that converts chemical energy of a spontaneous redox reaction into electrical energy is a:
29 / 40In any standard electrochemical cell, oxidation always takes place at the:
30 / 40In any standard electrochemical cell, reduction always takes place at the:
31 / 40The primary function of a salt bridge in a Galvanic cell is to continuously maintain:
32 / 40An increase in the exact oxidation number of an element in a reaction strictly indicates:
33 / 40A decrease in the exact oxidation number of an element in a reaction strictly indicates:
34 / 40Which of the following elements is considered the strongest oxidizing agent among halogens?
35 / 40The highest possible maximum oxidation state exhibited by Osmium (Os) is:
36 / 40A chemical reaction in which oxidation and reduction occur simultaneously is called a:
37 / 40What is the exact oxidation state of Sodium (Na) in
\( NaCl \)?
\( NaCl \)?
38 / 40The oxidation state of oxygen in Oxygen difluoride
\( (OF_2) \) is strictly:
\( (OF_2) \) is strictly:
39 / 40Calculate the exact oxidation number of Nitrogen (N) in
\( NO_2 \).
\( NO_2 \).
40 / 40In the permanganate ion
\( (MnO_4^-) \), the total net charge on the polyatomic ion is:
\( (MnO_4^-) \), the total net charge on the polyatomic ion is:
Test Analysis
Correct ✅ 0
Wrong ❌ 0
Unattempted ⚠️ 40
Accuracy 🎯 0%
Time Taken ⏱️ 00m 00s
