Which metal carbide is formed readily by the direct reaction?
Correct answer: D. Lithium
- A. Rubidium
- B. Potassium
- C. Sodium
- D. Lithium
Explanation
Explanation:Lithium carbide is the only alkali metal carbide formed via direct reaction. Rubidium carbide can be formed by reaction with carbon at high temperatures, but it is not as readily formed as lithium carbide. Potassium carbide can be formed by the direct reaction of potassium metal and carbon at high temperatures, but it is not as readily formed as lithium carbide. Sodium carbide can be formed by the direct reaction of sodium metal and carbon, but it is not as readily formed as lithium carbide and requires higher temperatures and pressures.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
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
Hydrogen loses an electron to form:
In many of its properties _ is quite different from the other alkali metals.
In Down cell, the anode is made up of _.
Which of the following carbonates of alkali metals is not stable towards heat and is decomposed on heating to its oxide along with liberation of CO2?
Chromyl Chloride test is performed to confirm:
A metal form strong base salts and stable carbonates. The metal is: