Melamine Resin

Q.

Which one of the following materials cannot be used to make a lens?

1. Water

2. Glass

3. Plastic

4. Clay

Q.

The total number of lone-pair of electrons in melamine is ___

Q. Which of the following is an addition polymer?

1. Neoprene
2. Teflon
3. Polyvinylchloride
4. All of the above

Q. 28.When m-bromobenzoic acid is treated with socl2 gives A and when A is treated with NH3 it gives B.B on reaction with Naoh+Br2 gives C. Identify C.

Q. Which of the following are synthetic polymer(s)?

1. Teflon
2. Terylene
3. Nylon
4. Proteins

Q. Which of the following polymer is used in making crockery?

1. All of above
2. Melamine polymer
3. Bakelite
4. Teflon

Q. Which of the following is/are examples of dihydric alcohol?

1. Ethylene glycol
2. Triethylene glycol
3. Glycerol
4. Propane-1, 2-diol

Q.

Name of polymer used in laminating sheets and give the name of monomeric units involved in its formation.

Q. how many monochlorinated products are possible for neo pentane??

Q. 36. A solution is found to contain same concentration of MgCl2 and acetic acid .Assume that in the mixture MgC l2 is dissociated 50 % while acetic acid is 50 % associated . Calculate the value of i.

Q. The acid which reduce tollens reagent Methanoic acid Ethanoic acid Butanoic acid Propanoic acid

Q.

How is the following resin intermediate prepared and which polymers is formed by this monomer unit?

Q. 2.Mechanism of HVZ reaction . ( Named reaction of Carboxylic Acid ).

Q.

The polymer divinyl acetylene is obtained from the monomer C2H2 C3H6 C6H6 C4H4

Q. What are blended fibres?

1. Mixture of two natural fibres
2. Mixture of natural and synthetic fibres
3. Mixture of two synthetic fibre
4. All of above

Q. What is the product obtained on kolbes electrolysis of adipic acid.

Q. Reaction between 1.formic acid and Toluene 2.formic acid and methoxy benzene

Q. The total number of lone pairs of electrons in melamine is
(IIT-JEE-2012)

1. 6
2. 4
3. 2
4. \N

Q. Nitration of salicylic acid

Q. Which of the following is a monomer of Dacron?

1. Adipic acid
2. Terephthalic acid
3. Acetic acid
4. Formic acid

Q. Identify the polymer generated by the reaction of methanal with the shown compound.

1. Melamine-formaldehyde
2. Novolac
3. Bakelite
4. Terylene

Q.

Contact lenses are usually made of

1. glass

2. plastic

3. semiconductor

4. none of these

Q. Dacron is an example of:

1. polyamide
2. polyester
3. addition polymer
4. (a) and (b) above

Q. Polypropylene can be obtained by polymerisation of :

1. $C{H}_2=CH-C{H}_3$
2. $C{H}_2=C{H}_2$
3. $C{H}_3-C{H}_3$
4. $C{H}_4$

Q. How will you the prepare following polymers? Mention one use for each.
a) Buna-S rubber
b) Nylon - $6,6$

Q. Which of the following is not correct regarding polymerization process?

1. Electrophiles like $B{F}_3$ are commonly used for the initiation of cationic polymerization
2. Anionic polymerization may take place in the presence of $NaN{H}_2$
3. Cationic polymerization is terminated by an acid
4. Anionic polymerization active centres are anions

Q. Which of the following is one of the starting materials for the following resin intermediate?

1. Formaldehyde
2. Phenol
3. Novolac
4. Bakelite

Q. The correct name of the polymer below is:

1. Dacron
2. Novolac
3. Melamine polymer
4. Bakelite

Q. The total number of lone-pairs of electrons in melamine is

Q. How many isomeric diaminobenzoic acid can be converted into m-phenylenediamine on decarboxylation?

1. $1$
2. $2$
3. $3$
4. $4$