Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
Correct answer: A. Lithium
- A. Lithium
- B. Sodium
- C. Potassium
- D. Rubidium
Explanation
Lithium reacts with oxygen mainly to form the normal oxide, Li2O. The larger alkali metals form peroxides or superoxides because their larger cations can stabilize these larger oxide ions. Students may choose sodium because it is also commonly associated with oxides, but sodium forms mainly sodium peroxide in excess oxygen.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Reactions of Group I Elements
Group I elements have one valence electron, so their reactivity increases down the group as ionisation energy decreases. Their reactions with water, oxygen, hydrogen and halogens produce hydroxides, oxides, hydrides and halides, while the behaviour of lithium differs from the heavier metals because of its small ionic size.
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.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Reactions of Group I Elements questions
Second ionization potential of alkali metals are very high due to_______________?
Which one of the following is caustic potash?
The most commonly used bleaching agent is_________?
In diaphragm cell hydrogen is discharged by the reduction of__________________?
Nitrates of which pair of elements give different products on thermal decomposition ?
The word Alkali means__________________?