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The mass of ammonia in grams produced when $2.8 kg$ of dinitrogen quantitatively reacts with $1 kg$ of dihydrogen is _____

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Important Questions on Some Basic Concepts of Chemistry

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 3rd April 2016>Q 42

300 K

and

1 atm

15 mL

of a gaseous hydrocarbon requires

375 mL

air containing

20 % O_{2}

by volume, for complete combustion. After combustion, the gases occupy

345 mL

. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:
(Assume complete combustion of reactant)

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 31 August 2021 Shift 2>Q 43

Sodium oxide reacts with water to produce sodium hydroxide.

20.0 g

of sodium oxide is dissolved in

500 mL

of water. Neglecting the change in volume, the concentration of the resulting

NaOH

solution is _________

\times 10^{- 1} M .

(Nearest integer)
[Atomic mass :

Na = 23.0, O = 16.0, H = 1.0

]

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 3 September 2020 Shift 2>Q 44

Complex A has a composition of

H_{12} O_{6} {Cl}_{3} C r

. If the complex on treatment with conc.

H_{2} {SO}_{4}

loses

13.5 %

of its original mass, the correct molecular formulas of

A

is:
[Given : atomic mass of

C r = 52

amu and

Cl = 35

amu]

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 3 September 2020 Shift 2>Q 45

0.023 \times 10^{22}

molecules are present in

10 g

of a substance

{}^{'}x^{'} .

The molarity of a solution containing

5 g

of substance 'x' in 2 L solution is

_________\times 10^{- 3}

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 3 September 2020 Shift 1>Q 46

The mole fraction of glucose

(C_{6} H_{12} O_{6})

in an aqueous binary solution is

0.1 .

The mass percentage of water in it, to the nearest integer, is

\dots \dots \dots

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 2nd April 2017>Q 47

1

gram of a carbonate

(M_{2} {CO}_{3})

on treatment with excess

HCl

produces

0.01186

moles of

{CO}_{2}

. The molar mass of

M_{2} {CO}_{3}

{gmol}^{- 1}

is:

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 27 July 2021 Shift 2>Q 48

10.0 mL

0.05 M {KMnO}_{4}

solution was consumed in a titration with

10.0 mL

of given oxalic acid dihydrate solution. The strength of given oxalic acid solution is ........

\times 10^{- 2} g / L

. (Round off to the nearest integer)

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 49

$1.46 g$ 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 ${mol}^{- 1} K^{- 1}]$

The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is _____

Important Questions on Some Basic Concepts of Chemistry

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The mass of ammonia in grams produced when $2.8 kg$ of dinitrogen quantitatively reacts with $1 kg$ of dihydrogen is _____