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The minimum number of moles of $O_{2}$ required for complete combustion of 1 mole of propane and 2 moles of butane is..............(Nearest integer)

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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 - 4th April 2015>Q 39

The molecular formula of a commercial resin used for exchanging ions in water softening is

C_{8} H_{7} S O_{3} N a

(molecular weight = 206)

. What would be the maximum uptake of

C a^{2 +}

ions by the resin if expressed in

mol

per

gm

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 4th April 2015>Q 40

In Carius method of estimation of halogens,

250 mg

of an organic compound gave

141 mg AgBr

. What is the percentage of bromine in the compound (atomic mass of

Ag = 108

and atomic number of

Br = 80

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 1 - Some Basic Concepts of Chemistry>JEE Main - 4 September 2020 Shift 1>Q 41

The mass of ammonia in grams produced when

2.8 kg

of dinitrogen quantitatively reacts with

1 kg

of dihydrogen is _____

HARD

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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JEE Main

IMPORTANT

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

]

MEDIUM

JEE Main

IMPORTANT

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

JEE Main

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}

MEDIUM

JEE Main

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

The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is..............(Nearest integer)

Important Questions on Some Basic Concepts of Chemistry

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The minimum number of moles of $O_{2}$ required for complete combustion of 1 mole of propane and 2 moles of butane is..............(Nearest integer)