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41
In . . . . . . . . each carbon atom is bound to three other carbon atoms in the same plane providing hexagonal array.
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Answer & Solution
Answer: Option B
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42
Which allotropes of carbon form geodesic globes?
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Answer & Solution
Answer: Option A
Solution:
* Allotropes are different structural forms of the same element.
* Carbon is special because it can form many different allotropes.

* Fullerenes: These are spherical or ellipsoidal molecules made of carbon atoms arranged in a geodesic structure, like a soccer ball. Think of them as tiny cages!

* Carbon nanotubes: These are cylindrical structures made of rolled-up sheets of graphite. They aren't spherical, so they don't form geodesic globes.

* Diamond: This has a giant covalent network structure, making it very hard. It doesn't form geodesic globes.

* Graphite: This consists of layers of carbon atoms arranged in hexagonal sheets. These sheets are flat, and do not form geodesic globes.

Therefore, only fullerenes form geodesic globes.
43
In . . . . . . . . each carbon atom is bound to four other carbon atoms that form a strongly threedimensional structure.
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Answer & Solution
Answer: Option B
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44
Which of the following is not a noble gas?
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Answer: Option B
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45
Allotropes of an element have different physical characteristics because they/their.
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Answer: Option D
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46
Which of the non-metals is brighter?
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Answer: Option D
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47
Incomplete combustion of a fuel gives poisonous . . . . . . . . gas.
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Answer: Option C
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48
Silver gets corroded due to . . . . . . . . in air.
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Answer & Solution
Answer: Option B
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49
What is the bond order of CO group?
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Answer: Option D
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50
2O represents two . . . . . . . . of oxygen.
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Answer: Option B
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