MEDIUM

JEE Main

IMPORTANT

Earn 100

$1.46 g$ of a biopolymer dissolved in a $100 mL$ water at $300 K$ exerted an osmotic pressure of $2.42 \times 10^{- 3} bar$

The molar mass of the biopolymer is $- \times 10^{4} g$ ${mol}^{- 1} .$ (Round off to the Nearest Integer)
[Use: $R = 0.083 L$ bar ${mol}^{- 1} K^{- 1}]$

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Important Questions on Some Basic Concepts of Chemistry

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 27 July 2021 Shift 1>Q 50

An organic compound is subjected to chlorination to get compound

A

using

5.0 g

of chlorine. When

0.5 g

of compound

A

is reacted with

{AgNO}_{3}

[Carius Method], the percentage of chlorine in compound

A

is when it forms

0.3849 g

AgCl .

(Round off to the Nearest Integer)
(Atomic masses of

Ag

and

Cl

are

107.87

and

35.5

respectively)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 27 August 2021 Shift 1>Q 51

When

10 mL

of an aqueous solution of

{KMnO}_{4}

was titrated in acidic medium, equal volume of

0.1 M

of an aqueous solution of ferrous sulphate was required for complete discharge of colour. The strength of

{KMnO}_{4}

in grams per litre is _______

\times 10^{- 2} .

(Nearest integer) [Atomic mass of

K = 39, Mn = 55, O = 16

]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 26 Feb 2021 Shift 2>Q 52

The

{NaNO}_{3}

weighed out to make

50 mL

of an aqueous solution containing

70.0 mg {Na}^{+}

per

mL

is_

g

. (Rounded off to the nearest integer) [Given : Atomic weight in

{gmol}^{- 1} - Na : 23; N : 14; O : 16

]

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 26 Feb 2021 Shift 1>Q 53

The number of significant figures in

50000.020 \times 10^{- 3}

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 26 August 2021 Shift 1>Q 54

An aqueous

KCl

solution of density

1.20 g {mL}^{- 1}

has a molality of

3.30 mol {kg}^{- 1}

. The molarity of the solution in

{molL}^{- 1}

is____.(The Nearest integer)

[

Molar mass of

KCl = 74.5 g]

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 25 July 2021 Shift 2>Q 55

The number of significant figures in

0.00340

is _________

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 25 July 2021 Shift 1>Q 56

Consider the complete combustion of butane, the amount of butane utilized to produce

72.0 g

of water is ______

\times 10^{- 1} g

. (in nearest integer)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 25 Feb 2021 Shift 2>Q 57

Consider titration of

NaOH

solution versus

1.25 M

oxalic acid solution. At the end point following burette readings were obtained.
(i)

4.5 mL

(ii)

4.5 mL

(iii)

4.4 mL

(iv)

4.4 mL

(v)

4.4 mL

If the volume of oxalic acid taken was

10.0 mL

then the molarity of the

NaOH

solution is ___

M

. (Rounded-off to the nearest integer)

1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42×10-3bar The molar mass of the biopolymer is -×104 g mol-1. (Round off to the Nearest Integer) [Use: R=0.083 L bar mol-1 K-1

Important Questions on Some Basic Concepts of Chemistry

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$1.46 g$ of a biopolymer dissolved in a $100 mL$ water at $300 K$ exerted an osmotic pressure of $2.42 \times 10^{- 3} bar$

The molar mass of the biopolymer is $- \times 10^{4} g$ ${mol}^{- 1} .$ (Round off to the Nearest Integer)
[Use: $R = 0.083 L$ bar ${mol}^{- 1} K^{- 1}]$