In polymer Buna-S : ‘S’ stands for:

In the given reaction 3-Bromo-2,2-dimethyl butane

⟶ C_{2} H_{5} OH

(Major Product) Product A is:

2 -Ethoxy- 3,3 -dimethyl butane
2 -Hydroxy-3,3-dimethyl butane,
2 -Ethoxy- 2,3 -dimethyl butane
1-Ethoxy-3,3-dimethyl butane

Topic:

Alcohols, Phenols and Ethers

Exam:

JEE Mains 2021 July 20 Shift 1

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The number of stereoisomers possible for

[Co (Ox)_{2} (Br) (NH_{3})]^{2 -}

is__________.
[ox = oxalate]

Topic:

Coordination Compounds

Exam:

JEE Mains 2021 Feb 26 Shift 2

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2,4-DNP test can be used to identify :

Aldehyde
Amine
Ether
Halogens

Topic:

Aldehydes, Ketones and Carboxylic Acids

Exam:

JEE Mains 2021 Feb 26 Shift 2

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Which of the following polymer is used in the manufacture of wool laminates?

Hard

Urea formaldehyde resin
cis-poly isoprene
Phenol and formaldehyde resin
Melamine formaldehyde resin

Topic:

Polymers

Exam:

JEE Mains 2021 Mar 16 Shift 2

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Practice questions from Polymers in the same exam

Which statement is correct?

Buna-S is a synthetic and linear thermosetting polymer.
Buna- N is a natural polymer
Synthesis of Buna-S needs nascent oxygen
Neoprene is an addition copolymer used in plastic bucket manufacturing

Topic:

Polymers

Exam:

JEE Mains 2021 Feb 25 Shift 1

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Which among the following is not a polyester ?

Novolac
Dacron
PHBV
Glyptal

Topic:

Polymers

Exam:

JEE Mains 2021 Aug 31 Shift 2

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The polymer obtained from the following reaction is:

Topic:

Polymers

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2019

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Bakelite is a cross-linked polymer of formaldehyde and :

PHBV
Dacron
Buna-S
Novolac

Topic:

Polymers

Exam:

JEE Mains 2021 July 20 Shift 2

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Practice more questions from Polymers

Arrange the following in increasing order of their intermolecular forces : Nylon-66 (I), Buna-S (II), Polythene (III)

II $<$ I $<$ III
III $<$ II $<$ I
I $<$ II $<$ III
II $<$ III $<$ I

Topic:

Polymers

Book:

New Pattern JEE Problems Chemistry for JEE Main and Advance( Master Problem Package) (Arihant)

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Natural rubber is polymer of:

Topic:

Polymers

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The correct statement about Thiokol rubber is that:

It is a natural polysulphide rubber
It is resistant to oils and abrasion
It is prepared by addition polymerization
All of the above are correct

Topic:

Polymers

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Which of the following has cross-links?

Vulcanised rubber
Nylon
Phenol-formaldehyde resins
Both (a) and (c) are correct

Topic:

Polymers

Book:

Calculus: Early Transcendentals

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Practice questions on similar concepts asked by Filo students

Titanium is used in desalination plants where sea water is converted into fresh water. Identify the properties of titanium that make it suited to this purpose.

Topic:

Chemistry

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(a) Calculatic Q 9. The standard electrode potential of Daniel cell is 1.1 V. Calculate the standard Gibbs enerigy for the following reaction : [2019](3M)

(K)_{mons ко} = \frac{G \cdot}{R}

K = \frac{129}{520} = 0.248 Ω^{- 1} m^{- 1} Λ_{m} = \frac{K \times 1000}{M} = \frac{0.248 \times 1000}{0.02} = 12400 Sm^{2} mol^{- 1}

Zn (s) + Cu^{2 +} (a q) ⟶ Zn^{2 +} (a q) + Cu (s)

E_{eal}^{e} = E_{e}^{\circ}

E_{coll}^{*} = + 0

(b)

Calculati

Δ, R

Sol. As we know that,

Δ G^{*} = - n F E^{*}

all Given, \[ \begin{aligned} E^{*} \text {,ein } & =1.1 \mathrm{~V} \\ n & =2 \\ \Delta G^{*} & =-2 \times 96500 \times 1 . \quad \text { [* } \mathrm{IF}=96500 \mathrm{C}] \\ & =-212300=-212.3 \mathrm{~kJ} \mathrm{~mol}^{-1} \end{aligned} \] Q 10. Phe electrical resistance of a column of

0.05

mol/itre of

NaOH

solution of diameter

1 cm

and length of

50 cm

5.55 \times 1 0^{3}

ohm. Calculate the resistivity, conductivity and molar conductivity. [Madel Paper) [aM] Sol. Diameter

= 1 cm

, radius

= 0.5 cm

Area = π^{2} = 3.14 \times (0.5)^{2} = 0.785 cm^{2} Resistivity (φ) = \frac{R \times A}{l} = \frac{5.55 \times 1 0 ^{2} \times 0.785}{50 ( Pn} = 87.135 ohm cm

Q 12. In the butt devices the Conductivity

(c) = \frac{1}{ρ} = \frac{1}{87.135}

Zn + Ag_{2} O

Determine

= 0.01148 ohm^{- 1} cm^{- 4}

Sol. In the giver Molar oonductivity

x_{i =}^{*} = \frac{κ \times 1000}{M} = \frac{0.01148 \times 1000}{0.05} = 229.65 cm^{2} mol^{- 1}

silver ions are

r

E_{i = 2}^{\circ} = E_{caube}^{\circ}

At anode; Q 11. Calculate the standard cell potentials of galvanic cell At cathode in which the following reactions takes place: (i)

2 Cr (a) + 3 Cd^{2 t} (a q) ⟶ 2 Cr^{3 *} (a q) + 3 Cd

(ii)

Fe^{2 +} (aq) + Ag * (a q) ⟶ Fe^{3 *} (a q) + Ag (s)

. Calculate the

4, G^{*}

and equilibrium constant for the reactions. [NCERT] [SM]

set

(i) Given

k_{g^{4}}^{2}^{2} 0 = - 0.74 V \cdot E_{i c e^{t 4} ce^{*}} = - 0.40 V

(a) Calculation of atandard cell potential

(R^{*})

K_{ail}^{2} = E_{optiok}^{4} - E_{mask}^{2} * (- 0.40) - (- 0.74) = + 0.34 V 8^{4} + 2 + 0.34 V^{2}

(b) Caleuiation of \, \mathrm{O}^{2}$

A G^{6} i = - N E^{4} F - (6 mol) \cdot (96300 C nanh^{H 0} \times i \times (0.34 V) - 136860 CY (196 mbe 0 d = - 196.86 kJ

Topic:

Electrochemistry

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formed at this temperature?

450^{\circ} C

the equilibrium constant

K_{p}

for the reaction

N_{2} + 3 H_{2} \Leftrightarrow 2 N H_{3}

was found to be

1.6 \times 10^{- 5}

at a pressure of

200

atm. If

N_{2}

and

H_{2}

are taken in

1 : 3

ratio. What is

%

N H_{3}

Topic:

Chemical Kinetics

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