Chemistry - Complete s-block Question with Solution | TestHub
ChemistryComplete s-blockMiscellaneous/MixedMedium2 minQB
ChemistryMediummatching list
List - I | List - II |
|---|---|
(P) | (1) Paramagnetic anion |
(Q) | (2) Homodiatomic, diamagnetic anion |
(R) | (3) Neutral aqueous solution |
(S) NaCl | (4) Gives hydrogen on hydrolysis |
Options:
Answer:
D
Solution:
P → 4: Calcium hydride (CaH₂) undergoes hydrolysis to liberate hydrogen gas (CaH₂ + 2H₂O → Ca(OH)₂ + 2H₂↑).
Q → 2: Potassium peroxide (K₂O₂) contains the peroxide ion (O₂²⁻), which is a homodiatomic, diamagnetic anion with all electrons paired.
R → 1: Potassium superoxide (KO₂) contains the superoxide ion (O₂⁻), which contains one unpaired electron, making it a paramagnetic anion.
S → 3: Sodium chloride (NaCl) is a salt of a strong acid (HCl) and strong base (NaOH), forming a neutral aqueous solution.
Stream:JEESubject:ChemistryTopic:Complete s-blockSubtopic:Miscellaneous/Mixed
⏱ 2mℹ️ Source: QB
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