CBSE
Multiple Choice QuestionsChoose the correctly paired gaseous cation and its magnetic (spin only) moment (in B.M.)
Ti2+,3.87 B.M.
Cr2+, 4.90 B.M.
Co3+,3.87 B.M.
Mn2+,4.90 B.M.
What is the oxidation number of Br in KBrO4 ?
+ 6
+ 7
+ 5
+ 8
Assertion : Molecular nitrogen is less reactive than molecular oxygen.
Reason: The bond length of N2 is shorter than that of oxygen.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Which of the following represents the correct bond order?
Assertion : NF3 is a weaker ligand than N(CH3)3.
Reason : NF3 ionizes to give F- ions in aqueous solution.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Which of the following is not sp2 hybridised?
Graphite
Graphene
Fullerene
Dry ice
In O3 molecule, the formal charge on the central O-atom is
0
-1
-2
+1
Which ofthe following statements is incorrect?
Li+ has minimum degree of hydration.
The oxidation state of K in KO2 is + 1.
Na is used to make a Na/Pb alloy.
MgSO4 is readily soluble in water.
Assertion: Co(IV) is known but Ni(IV) is not.
Reason: Ni(IV) has d4 electronic configuration.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : O2 has higher bond length than O3.
Reason: O3 is paramagnetic.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
