Back to S-BLOCK ELEMENTS

JEE CHEMISTRY MCQ: S-BLOCK ELEMENTS

1 Medium

1 of 1

Analyzing +4 | -1

Assertion (A): Group 1 elements are the largest in their horizontal periods in the periodic table (exclude noble gases).

Reason (R): The melting and boiling points of group 1 elements increases on moving down from

Li

to

Cs

.

View answer and explanation

Correct option: C

Assertion (A) is true, and Reason (R) is false.

Option C (Assertion (A) is true, and Reason (R) is false) is correct because Group 1 elements are indeed the largest in their respective periods (excluding noble gases), but the melting and boiling points of Group 1 elements decrease, not increase, down the group from Li to Cs.

More Questions from S-BLOCK ELEMENTS

Practice All Chapter MCQs →

Assertion (A): Among the alkali metals, lithium salts exhibit the least electrical condutance in aqueous solutions.
Reason (R): Smaller the radius of the hydrated cation, lower is the electrical conductance in aqueous solutions.

(A)

is a ternary salt with divalent cation.

(A)

gives yellow ppt. with

\mathrm{K}_2 \mathrm{CrO}_4

as well as with

\mathrm{AgNO}_3

. (A) is precipitated by

\mathrm{H}_2 \mathrm{~S}

neither in acidic nor ammoniacal medium, but addition of

\left(\mathrm{NH}_4\right)_2 \mathrm{CO}_3

\mathrm{NH}_4 \mathrm{OH}

gave white ppt. (B).

0.297 \mathrm{~g}

(A)

0.197 \mathrm{~g}

(B)

(A)

. In the Down’s cell

\mathrm{KCl}

\mathrm{NaCl}

to: Which of the alkali metal is having least melting point? Fusion mixture is comprised of: Statement 1:

{LiCl}

is predominatly a covalent compound.

Statement 2: Electronegativity difference between

{Li}

{Cl}