Home
Class 11
CHEMISTRY
Assertion : Gallium has smaller atomic s...

Assertion : Gallium has smaller atomic size than aluminium
Reason : Because of greater nuclear attraction due to poor shielding effect of outer shell electrons from the nucleus by the d-electrons

A

If both (A) and (R) are correct and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A)

C

If (A) is correct, but (R) is incorrect

D

If both (A) and (R) are incorrect.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • p-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise GROUP 14: CARBON FAMILY LEVEL - I (HOMEWORK)|12 Videos

  • p-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise GROUP 14: CARBON FAMILY LEVEL - II|17 Videos

  • p-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise LEVEL- III (Linked Comprehension Type) (Paragraph IV )|3 Videos

  • ORGANIC CHEMISTRY: BASIC PRINCIPLES - PART III (PURIFICATION AND CHARACTERISATION OF ORGANIC COMPOUND)

    BRILLIANT PUBLICATION|Exercise LEVEL - II (Assertion Reason type Question)|8 Videos

  • PURIFICATION AND CHARACTERISATION OF ORGANIC COMPOUNDS

    BRILLIANT PUBLICATION|Exercise LEVEL- III (Linked Comprehension Tyne (Paragraph I))|12 Videos

Similar Questions

Explore conceptually related problems

Assertion: The ionization of s-electrons requires more energy than that for the ionization of p-electrons in the same shell. Reason: s-electrons are closer to the nucleus than p-electrons and hence are more strongly attracted by nucleus.

Assertion: Among isoelectronic species, the cation with the greater positive charge will have a smaller radius. Reason :Greater is the attraction of the electrons to the nucleus, smaller is the size of atom/ion.

Assertion : Atomic size of Boron is larger than Beryllium Reason : Alkali metals have only one electron in the valence shell

Assertion : Atomic size of silver is almost the same as that of gold. Reason :d-subshell has low penetration power and produces poor shielding.

Assertion : The atomic size generally increases across a period and decreases down the group. Reason: Atomic size depends upon valence shell electronic configuration.

Assertion : F atom has a less negative election gain enthalpy than Cl atom. Reason : Additional electrons are repelled more effectively by 3p electrons in Cl atom than by 2p electrons in F-atom.

Assertion: Dipolemoment ofphenol is smaller than that of methanol. Reason: In phenol C-O bond is less polar due to electron withdrawing effect of the benzene ring whereas in methanol, C-O bond Is more polar due to electron releasing effect of CH_3 group.