Melting points of group IIA elements are considerably higher than those of group IA elements because;
Correct answer: D. IIA provide more binding electron
- A. Size of IIA is greater than IA
- B. LE of IIA is higher than IA
- C. LE of IIA is less than IA
- D. IIA provide more binding electron
Explanation
The melting points of Group IIA elements are considerably higher than those of Group IA elements because Group IIA elements (alkaline earth metals) have two valence electrons, providing more 'binding electrons' compared to Group IA elements (alkali metals), which have only one valence electron. The presence of two valence electrons contributes to stronger metallic bonding in Group IIA elements, leading to higher melting points.Additionally, the incorrect options provide explanations based on atomic size and lattice energy, which do not directly relate to the difference in melting points between Group IIA and Group IA elements.
Last updated
About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
Practise s-Block and p-Block Elements
1,359 free s-Block and p-Block Elements MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2NaOH(aq) + Cl2(g) → NaCl + NaClO + H2O proceed at:
A compound 'X' on heating gives a colourless gas. The residue is dissolved in water to produce 'Y'. When CO₂ is passed through the aqueous solution of 'Y', it produces 'Z', which on gentle heating gives back 'X'. Compound 'X' is:
A elements are named as alkali metals because
A gas which burn with blue flame is:
A gas which burns with a blue flame is