The law of traids is applicable to__________?
Correct answer: C. Cl, Br, I
- A. Li, Be, B
- B. F, Cl, Br
- C. Cl, Br, I
- D. Na, K, Rb
Explanation
Dobereiner's triads contain three elements with similar properties, such as chlorine, bromine and iodine, written as F, Cl and Br in the options here? Actually the valid halogen triad listed is Cl, Br, I, so option c is correct. Students may choose d because Na, K and Rb are successive Group 1 elements, but Na, K and Rb are not the usual Dobereiner triad used in this question.
Last updated
About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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
2. Law of octaves was proposed by
7th period of the periodic table contains normal elements:
(A), (B) and (C) are elements in the third period. The oxide of(A) is ionic, that of (B) is amphoteric and that of (C) is a giant molecule (covalent network). (A), (B) and (C) have atomic numbers in the order:
(A), (B) and (C) are elements in the third short period. Oxide of (A) is ionic, that of (B) is amphoteric and of (C) a giant molecule. (A), (B) and (C) have atomic numbers in the order of:
A gas that reacts with CaO and not with NaHCO3 is: