Please select a subject first
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\[\ce{CH2OH-CO-(CHOH)4-CH2OH}\] is an example of ______.
Concept: undefined >> undefined
Give scientific reasons:
The disaccharide sucrose gives negative Tollens test while the disaccharide maltose gives a positive Tollens test.
Concept: undefined >> undefined
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Give scientific reasons:
Hydrolysis of sucrose is called inversion.
Concept: undefined >> undefined
Give two evidences for presence of formyl group in glucose.
Concept: undefined >> undefined
Draw a neat diagram for the following:
Haworth formula of glucopyranose.
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Draw a neat diagram for the following:
Haworth formula of maltose
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Draw the flow chart diagram to show the classification of polymers based on the type of polymerization.
Concept: undefined >> undefined
Answer the following in one sentence.
Name some chain-growth polymers.
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Answer the following in one sentence.
Define the term: Synthetic fibres
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Answer the following in one sentence.
Give one example each of copolymer and homopolymer.
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Answer the following.
Write the names of classes of polymers formed according to intermolecular forces and describe briefly their structural characteristics.
Concept: undefined >> undefined
Answer the following.
Classify the following polymers as natural and synthetic polymers
- Cellulose
- Polystyrene
- Terylene
- Starch
- Protein
- Silicones
- Orlon (Polyacrylonitrle)
- Phenol-formedehyde resins
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Answer the following.
What are synthetic resins? Name some natural and synthetic resins.
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Answer the following.
Distinguish between thermosetting and thermoplastic resins. Write example of both the classes.
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Answer the following
How is polythene manufactured? Give their properties and uses.
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Attempt the following:
Classify the following polymer as straight-chain, branched-chain and cross-linked polymers.
\[\begin{array}{cc}\ce{- (CH2 - CH -)_\text{n}}\\
\phantom{.....}|\\\ce{\phantom{.......}CN}\end{array}\]
Concept: undefined >> undefined
Attempt the following:
Classify the following polymer as straight-chain, branched-chain and cross-linked polymers.
\[\begin{array}{cc}
\ce{-(CH2 - CH2 - CH - CH2 - CH2)_\text{n}}\\
|\phantom{..}\\\ce{\phantom{..}CH2}\\
|\phantom{..}\\\ce{\phantom{..}CH2}\end{array}\]
Concept: undefined >> undefined
Attempt the following:
Classify the following polymer as straight-chain, branched-chain and cross-linked polymers.
Concept: undefined >> undefined
Answer the following.
Explain in detail free radical mechanism involved during preparation of addition polymer.
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Answer the following in one or two sentences.
For the reaction,
\[\ce{CH3Br_{(aq)} + OH^-_{ (aq)} -> CH3OH^-_{ (aq)} + Br^-_{ (aq)}}\], rate law is rate = k`["CH"_3"Br"]["OH"^-]`
What is the change in rate if concentrations of both reactants are doubled?
Concept: undefined >> undefined
