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Which of the following elements will have the lowest first ionisation energy?
Options
(a) Li
(b) Mg
(c) Ca
(d) Rb
Correct Answer:
Rb
Explanation:
Rb belongs to I-A group and has maximum size. Hence, has lowest IE₁.
Related Questions: - When enthalpy and entropy change for a chemical reaction are – 2.5 x 10³ cals
- Oxidation number of iodine in IO₃⁻, IO₄⁻, KI and I₂ respectively are
- pH of pure water is
- The mass of an object changes from 0.002 g to 0.00025 g in a time period
- How many grams of dibasic acid (mol.wt.200) should be present in 100 mL.
Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Classification of Elements and Periodicity
(94)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When enthalpy and entropy change for a chemical reaction are – 2.5 x 10³ cals
- Oxidation number of iodine in IO₃⁻, IO₄⁻, KI and I₂ respectively are
- pH of pure water is
- The mass of an object changes from 0.002 g to 0.00025 g in a time period
- How many grams of dibasic acid (mol.wt.200) should be present in 100 mL.
Question Type: Memory (964)
Difficulty Level: Easy (1008)
Topics: Classification of Elements and Periodicity (94)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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