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प्रश्न
Write a short note on the catalytic activity of nanoparticles.
उत्तर
Catalytic activity of nanoparticles:
- Due to an increase in surface area with a decrease in particle size, nanomaterial-based catalysts show increased catalytic activity.
- Usually, they are heterogeneous catalysts that mean catalysts are in solid form and the reactions occur on the surface of the catalyst.
- Nanoparticle catalysts can be easily separated and can be recycled.
e.g. Pd, Pt metal nanoparticles used in hydrogenation reactions.
TiO2, ZnO are used in photocatalysis.
Gold in bulk form is unreactive, but gold nanoparticles are found to be a very good catalyst for various organic reactions.
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संबंधित प्रश्न
Nanorods are the example of _____________
Name the catalyst used to manufacture H2SO4 by contact process.
Write any example of nanoparticles which is used in photocatalysis.
Complete and write the following table
| Reaction | Name of catalyst |
| i) Manufacture of HDPE polymer | ________________ |
| ii) _______________ | V2O5 |
Select the CORRECT statement.
Name the nanoparticles used a catalyst in hydrogenation reaction.
Rewrite the following reaction by filling the blanks:
\[\ce{CH3 - CH - CH2 + HBr -> \underset{(major)}{\underline{}\underline{}\underline{}\underline{}} + \underset{(minor)}{\underline{}\underline{}\underline{}\underline{}}}\]
Rewrite the following reaction by filling the blanks:
\[\ce{CH3 - CH = CH2 + HBr ->[peroxide] \underset{(major)}{\underline{}\underline{}\underline{}\underline{}} + \underset{(minor)}{\underline{}\underline{}\underline{}\underline{}}}\]
Rewrite the following reaction by filling the blanks:
\[\ce{(CH3)2C = CHCH3 + HBr ->[peroxide] \underset{(major)}{\underline{}\underline{}\underline{}\underline{}} + \underset{(minor)}{\underline{}\underline{}\underline{}\underline{}}}\]
