Rubber

Q. 50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount (in g) of NaOH in 50 mL of the given sodium hydroxide solution is :

Q. 100ml of 0.1N NAOH solution is required for neutralizing 0.49g of a dibasic acid . what is the molecular weight of the acid?

Q. Convert Ethne To Propyne

Q. Buna-S rubber is which of the following of 1-3-butadiene and styrene

1. Polymers
2. Copolymer
3. Step growth polymer
4. Condensation polymer

Q.

What is meant by Polymers?

Q. How can the Carbon of Methyl Carbanion have a lone pair?

Q. Natural rubber is a polymer of:

1. Styrene
2. Ethyne
3. Butadiene
4. Isoprene

Q. What is th hybridisation of ICl2-

Q. Identify the effects in the following molecules among inductive , mesomeric and baker nathan effect ? Also tell the positions where these are experienced 1) C2H5Cl 2) CH3-CH=CH2 3) CH2=CH-CH=CH2 4) CH3-CH=CH-COCH3

Q. Which of the following is used in the manufacture of Synthetic Rubber?

1. Nylon
2. Dacron
3. Neoprene
4. Cis-polyisoprene

Q. Pick up the properties of Natural rubber

1. Sticky
2. Elastic
3. Usable temperature lies between 283-335 K
4. Water repellent

Q. Natural rubber is a polymer of:

1. Styrene
2. Ethyne
3. Butadiene
4. Isoprene

Q. 1, 3-butadiene reacts with ethylene to form (a) benzene (b) cyclohexane (c) cyclohexene (d) 2, 3 dimethyl butane

Q. How to compare the acidity between cyclohexanol and cyclohexylacetyline

Q. The monomeric units of terylene are glycol and which of the following?

1. 
2. 
3. 
4. 

Q.

Natural rubber has

1. alternate cis- and trans-configuration

2. random cis- and trans-configuration

3. all cis- configuration

4. all trans- configuration

Q.

Inorganic polymer among the following is

1. Rayon

2. Starch

3. Silicone rubber

4. Natuarl rubber

Q.

Assertion: Teflon has high thermal stability and chemical inertness.
Reason: Teflon is a thermoplastic.

1. If both assertion and reason are true and the reason is the correct explanation of the assertion.

2. If both assertion and reason are true but reason is not the correct explanation of the assertion.

3. If the assertion and reason both are false.

4. If assertion is false but reason is true.