Year: 2022
Topic: Classification of Elements and Periodicity in Properties
Time :
1.
Identify the incorrect statement from the following
(1). Alkali metals react with water to form their hydroxides.
(2). The oxidation number of K in KO
2
is +4.
(3). Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
(4). Lithium is the strongest reducing agent among the alkali metals.