1
JEE Main 2022 (Online) 27th July Evening Shift
+4
-1

An element A of group 1 shows similarity to an element B belonging to group 2. If A has maximum hydration enthalpy in group 1 then B is :

A
Mg
B
Be
C
Ca
D
Sr
2
JEE Main 2022 (Online) 27th July Evening Shift
+4
-1

Which of the following enhances the lathering property of soap?

A
Sodium stearate
B
Sodium carbonate
C
Sodium rosinate
D
Trisodium phosphate
3
JEE Main 2022 (Online) 26th July Evening Shift
+4
-1

The metal that has very low melting point and its periodic position is closer to a metalloid is

A
Al
B
Ga
C
Se
D
In
4
JEE Main 2022 (Online) 26th July Evening Shift
+4
-1

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: $$\mathrm{LiF}$$ is sparingly soluble in water.

Reason R: The ionic radius of $$\mathrm{Li}^{+}$$ ion is smallest among its group members, hence has least hydration enthalpy.

In the light of the above statements, choose the most appropriate answer from the options given below.

A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is NOT the correct explanation of A.
C
A is true but R is false.
D
A is false but R is true.
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