This set of Multiple Choice Questions & Answers (MCQs) focuses on “Nanomaterials – Set 9”.
1. Ormoslis are the compounds of _______
a) Organic and inorganic substances
b) Metal and inorganic substances
c) Organic and metal substances
d) Organic compounds
View Answer
Explanation: Ormoslis are the compounds of organic substances and inorganic substances. Organic and metals give organometallic compounds and inorganic compounds are the oxides, nitrates etc. of metals.
2. A compound has polymers embedded in inorganic matrix and bonded by weak bonds, which hybrid ormoslis is it?
a) Class 1 ormoslis
b) Class 2 ormoslis
c) Class 1 organometallic compounds
d) Class 2 organometallic compounds
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Explanation: When polymers are embedded in inorganic compounds and held there by weak forces then these compounds are ormoslis or organic inorganic hybrids. As these compounds are bonded by weak bonds between organic and inorganic compounds so these are class 1 ormoslis. These are not organometallic compounds.
3. A compound has polymers embedded in inorganic matrix and bonded by covalent bonds, which hybrid ormoslis is it?
a) Class 1 ormoslis
b) Class 2 ormoslis
c) Class 1 organometallic compounds
d) Class 2 organometallic compounds
View Answer
Explanation: When organic and inorganic molecules are linked to each other by covalent bonds then these compounds are ormoslis or organic inorganic hybrids. As these compounds are bonded by covalent bonds between organic and inorganic compounds so these are class 2 ormoslis and as these is no metal, so these are not organometallic.
4. Ormocers are the compounds of _______
a) Organic and inorganic substances
b) Metal and inorganic substances
c) Organic and metal substances
d) Organic compounds
View Answer
Explanation: Ormocers are the compounds of organic substances and inorganic substances. Organic and metals give organometallic compounds and inorganic compounds are the oxides, nitrates etc. of metals.
5. In ormoslis class 1 hybrid, polymers are physically trapped inside the inorganic matrix.
a) True
b) False
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Explanation: In class 1 hybrid organic inorganic ormoslis, polymers interacts by weak forces thus they are physically trapped. These forces are van der wall forces and dipole interactions etc.
6. Which compounds are best suited for molecular sieves?
a) Ormoslis
b) Ormocers
c) Zeolites
d) Polythene
View Answer
Explanation: Ormoslis and Ormocers are the hybrids of organic compounds and inorganic compounds but they are not always porous. Polythene is not porous and thus it cannot be used as sieves. Zeolites are the tertiary- aluminium silicates and have various sieves and porous so they are best suited for molecular sieves.
Sanfoundry Global Education & Learning Series – Nanomaterials.
To practice all areas of Nanomaterials, here is complete set of Multiple Choice Questions and Answers.
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