PTFE

Q. the molarity of 9.8%(w/w) H_2SO_4 solution is (d=1.02g/cc

Q.

Which one of the following polymers is not obtained by condensation polymerization

1. Bakelite

2. Nylon 6

3. Buna-N

4. Nylon 6, 6

Q. Is NH4CN strong or weak salt?

Q. Given below are two statements, one is Assertion (A) and other is Reason (R).

Assertion (A): Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties.

Reason (R): The cis-polyisoprene molecules consist of various chains held together by strong polar interactions with coiled structure.
In the light of the above statements, choose the correct one from the options given below:

Q. A 0.025 m solution of monobasic acid had a freezing point of -0.060^° C. The pKa for the acid is(K_b=1.86 K kg/mol)- 1) 1.2, 2) 2, 3) 2.5, 4) 5.7

Q. The monomer of the following polymer is:

1. $H_{2}C=C{\left(C{H}_3\right)}_2$
2. ${\left(C{H}_3\right)}_{2}C=C{\left(C{H}_3\right)}_2$
3. $C{H}_{3}CH=C{H}_2$
4. $C{H}_{3}CH=CHC{H}_3$

Q.

Explain addition polymers with an example.

Q. in which cases Na/C2H5OH can be used as a reducing agent?

Q. 49. If 25ml of H2SO4 solution reacts completely with 1.06g of NA2CO3, what is normality of this acid solution?

Q.

Explain the use of graphite in the manufacturing of refractory crucible

Q. Titration of 0.2121g of pure sodium oxalate requires 43.31ml of KMnO4 solution. The molarity of KMnO4 solution is??

Q. (C2H5)3N+HCL→?

Q.

Write IUPAC name for each of the following:

$\left(i\right)$ Acetic acid $\left(ii\right)$ Methyl alcohol $\left(iii\right)$ Formaldehyde $\left(iv\right)$ Acetone $\left(v\right)$ Isobutane $\left(vi\right)$ Dimethyl ether $\left(vii\right)$ Formic acid $\left(viii\right)$ Acetaldehyde

Q. CH3 CH= CHC(Br) (CH3)2 What is the iupacname of this compound? 2-bromo-2-methylpent-3-ene Or 4-bromo-4-methylpent-2-ene(allyl halide)?

Q. Polyester is made up of the repeating units of a chemical called :

1. ester
2. ether
3. cotton
4. ethene

Q. why o-toluidine in iupac written as 2- Aminotoluene not as 2- methylanilin

Q.

What is the best plastic polymer?

Q. when sno2 is added to naoh solution boiling point of the naoh solutio

Q. 9. what is the n factor of K2Cr2O7 in alkaline medium?

Q. compare the conductivity of aqueous solution of LiCl , NaCl, KCl

Q.

Assertion (A) Polytetrafluoroethene is used in making non-stick cookwaters.

Reason (R) Fluorine has highest electronegativity.

(a) Assertion and Reason both are correct statement But reason does not explain Assertion.

(b) Assertion and Reason both are correct statement and Reason explains the Assertion.

(c) Both assertion and reason are wrong statements.

(d) Assertion is correct statement and Reason is wrong statement.

(e) Assertion is wrong statement and reason is correct statement.

Q.

Which of the following is resistant to boiling aqua-regia

1. Teflon

2. Polythene

3. Perspex

4. Bakelite

Q. a 0.004M solution of K4\lbrack Fe(CN)6\rbrack is isotonic with 0.01M solution of urea at same temperature.The molarity of K+ ions in the solution will be 1)0.375M 2)3M 3)0.006M 4)0.015M

Q. which of the following aqueous solution will boil at lowest temperature \lbrack a\rbrack 0.1m CH3COOH \lbrack b\rbrack 0.1m sucrose \lbrack c\rbrack 0.1m CaCl2 \lbrack d\rbrack 0.1m AgNO3

Q.

Teflon is a polymer of the monomer

1. CHF = CH₂

2. CHF = CHCl

3. CHCl = CHCl

4. F₂C = CF₂

Q. the molarity of a 0.2N Na2CO3 solution will be

Q. Derive the equation of henry's law

Q.

Which of the following is true regarding Teflon?

1. Polymer molecules are associated by strong dipole-dipole attraction

2. All the above

3. It has very high thermal stability
4. It is a linear, Unbranched polymer of tetrafluoro ethylene

Q. Write the names and structures of monomers used for getting the following polymers.
(i) Teflon
(ii) Bakelite

Q. How many gram of Caco3 reacts completely with 73 g of Hcl ?