- (A) Acidic
- (B) Amphoteric
- (C) Neutral
- (D) All of the above
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- (A) Lanthanides
- (B) Actinides
- (C) Rare earth metals
- (D) All
- (A) Valency
- (B) Atomic mass
- (C) Atomic number
- (D) Valence electrons
- (A) Same family
- (B) Same period
- (C) p block elements
- (D) Right upper corner
- (A) Dobereiner
- (B) Newland
- (C) Mendeleev
- (D) Al-Razi
- (A) Physical properties
- (B) Chemical properties
- (C) Properties of their compounds
- (D) All
- (A) H+
- (B) H-
- (C) Mg2+
- (D) Ca2+
- (A) Alkali metals (I-A)
- (B) Group-14 elements (IV-A)
- (C) Group-18 elements (VIII-A)
- (D) Halogens (VII-A)
- (A) Na+
- (B) K+
- (C) Mg+2
- (D) Ca+2
- (A) Increase
- (B) Decrease
- (C) Remain constant
- (D) No regular trend
