MEDIUM

JEE Main

IMPORTANT

Earn 100

The number of $N$ atoms in $681 g$ of $C_{7} H_{5} N_{3} O_{6}$ is $x \times 10^{21}$ . The value of $x$ is $(N_{A} = 6.02 \times 10^{23} {mol}^{- 1})$ (Nearest Integer)

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Important Questions on Some Basic Concepts of Chemistry

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 25 June 2022 Shift 1>Q 79

Number of grams of bromine that will completely react with

5.0 g

of pent-

1

-ene is____

\times 10^{- 2} g

. (Atomic mass of

Br = 80 g / mol

) [Nearest integer]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 25 June 2022 Shift 2>Q 80

A protein '

A

' contains

0.30 %

of glycine (molecular weight

75

). The minimum molar mass of the protein '

A

' is____

\times 10^{3} g {mol}^{- 1}

[nearest integer]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 26 June 2022 Shift 2>Q 81

CNG

is an important transportation fuel. When

100 gCNG

is mixed with

208 g

oxygen in vehicles, it leads to the formation of

{CO}_{2}

and

H_{2} O

and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is [nearest integer] [Assume CNG to be methane]

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 26 June 2022 Shift 2>Q 82

The moles of methane required to produce

81 g

of water after complete combustion is____

\times 10^{- 2} mol

. [nearest integer]

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 26 June 2022 Shift 1>Q 83

A commercially sold conc.

HCl

35 % HCl

by mass. If the density of this commercial acid is

1.46 g / mL

, the molarity of this solution is : (Atomic mass :

Cl = 35.5 amu, H = 1 amu

)

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 26 June 2022 Shift 1>Q 84

On complete combustion

0.30 g

of an organic compound gave

0.20 g

of carbon dioxide and

0.10 g

of water. The percentage of carbon in the given organic compound is____(Nearest Integer)

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 27 June 2022 Shift 1>Q 85

Two elements

A

and

B

which form

0.15

moles of

A_{2} B

and

{AB}_{3}

type compounds. If one mole of each

A_{2} B

and

{AB}_{3}

weigh equally, then the atomic weight of

A

is____times of atomic weight of

B

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 27 June 2022 Shift 2>Q 86

$116 g$ of a substance upon dissociation reaction, yields $7.5 g$ of hydrogen, $60 g$ of oxygen and $48.5 g$ of carbon. Given that the atomic masses of $H, O$ and $C$ are $1, 16$ and $12$ , respectively. The data agrees with how many formulae of the following?

A. ${CH}_{3} COOH$

B. $HCHO$

C. ${CH}_{3} {OOCH}_{3}$

D. ${CH}_{3} CHO$

The number of N atoms in 681 g of C7H5N3O6 is x×1021. The value of x is NA=6.02×1023 mol-1 (Nearest Integer)

Important Questions on Some Basic Concepts of Chemistry

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The number of $N$ atoms in $681 g$ of $C_{7} H_{5} N_{3} O_{6}$ is $x \times 10^{21}$ . The value of $x$ is $(N_{A} = 6.02 \times 10^{23} {mol}^{- 1})$ (Nearest Integer)