1
JEE Main 2022 (Online) 28th July Evening Shift
+4
-1

The correct decreasing order for metallic character is

A
Na > Mg > Be > Si > P
B
P > Si > Be > Mg > Na
C
Si > P > Be > Na > Mg
D
Be > Na > Mg > Si > P
2
JEE Main 2022 (Online) 28th July Evening Shift
+4
-1

Statement I : An alloy of lithium and magnesium is used to make aircraft plates.

Statement II : The magnesium ions are important for cell-membrane integrity.

In the light the above statements, choose the correct answer from the options given below

A
Both Statement I and Statement II are true
B
Both Statement I and Statement II are false
C
Statement I is true but Statement II is false
D
Statement I is false but Statement II is true
3
JEE Main 2022 (Online) 28th July Morning Shift
+4
-1

Which of the following statement is incorrect?

A
Low solubility of LiF in water is due to its small hydration enthalpy.
B
$$\mathrm{KO}_{2}$$ is paramagnetic.
C
Solution of sodium in liquid ammonia is conducting in nature.
D
Sodium metal has higher density than potassium metal.
4
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
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