Oxidation States and Chemical Reactivity NEET Questions

Oxidation States and Chemical Reactivity MCQ Questions

7.
In a redox reaction, the number of electrons lost in oxidation:
A.
Has no relation to electrons gained
B.
Equals the number of electrons gained in reduction
C.
Is greater than electrons gained in reduction
D.
Is less than electrons gained in reduction
ANSWER :
B. Equals the number of electrons gained in reduction
8.
The oxidation state of an element in its free (elemental) form is:
A.
+1
B.
-1
C.
Zero
D.
Equal to its valency
ANSWER :
C. Zero
9.
The oxidation state of a monoatomic ion is:
A.
Always +1
B.
The number of electrons in the ion
C.
Equal to its charge
D.
Always zero
ANSWER :
C. Equal to its charge
10.
In all compounds, the oxidation state of fluorine is:
A.
Always +1
B.
Variable
C.
+1 or -1
D.
Always -1
ANSWER :
D. Always -1
11.
The usual oxidation state of oxygen in compounds is:
A.
0
B.
+2
C.
-2
D.
-1
ANSWER :
C. -2
12.
The oxidation state of oxygen in Hâ‚‚Oâ‚‚ (hydrogen peroxide) is:
A.
+1
B.
-2
C.
-1
D.
0
ANSWER :
C. -1