Embibe Experts Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 1: JEE Main - 1 February 2023 Shift 2

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Embibe Experts Chemistry Solutions for Exercise - Embibe Experts Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 1: JEE Main - 1 February 2023 Shift 2

Attempt the free practice questions on Chapter 1: Some Basic Concepts of Chemistry, Exercise 1: JEE Main - 1 February 2023 Shift 2 with hints and solutions to strengthen your understanding. EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 1: JEE Main - 1 February 2023 Shift 2 with Hints & Solutions

EASY
JEE Main
IMPORTANT

When a hydrocarbon A undergoes combustion in the presence of air, it requires 9.5 equivalents of oxygen and produces 3 equivalents of water. What is the molecular formula of A?

MEDIUM
JEE Main
IMPORTANT

The volume of HCl, containing 73g L-1, required to completely neutralise NaOH obtained by reacting 0.69 g of metallic sodium with water, is _____ mL. (Nearest Integer)

(Given : molar Masses of Na,Cl,O,H are 23,35.5,16 and 1g mol-1 respectively)

HARD
JEE Main
IMPORTANT

Some amount of dichloromethane CH2Cl2 is added to 671.141mL of chloroform CHCl3 to prepare 2.6×10-3M solution of CH2Cl2DCM. The concentration of DCM is _____ ppm (by mass).

Given: Atomic mass : C=12;H:1;Cl=35.5 density of CHCl3=1.49g cm-3

EASY
JEE Main
IMPORTANT

On complete combustion, 0.492 g of an organic compound gave 0.792 g of CO2. The % of carbon in the organic compound is (Nearest integer)

EASY
JEE Main
IMPORTANT

Zinc reacts with hydrochloric acid to give hydrogen and zinc chloride. The volume of hydrogen gas produced at STP from the reaction of 11.5 g of zinc with excess HCl is L (Nearest integer)
(Given : Molar mass of Zn is 65.4 g mol-1 and Molar volume of H2 at STP=22.7 L )

MEDIUM
JEE Main
IMPORTANT

Assume carbon burns according to following equation :
2C(s)+O2( g)2CO (s) 
when 12 g carbon is burnt in 48 g of oxygen, the volume of carbon monoxide produced is ______×10-1 L at STP [nearest integer]

[Given : Assume CO as ideal gas, Mass of C is 12 g mol-1, mass of O is 16 g mol-1 and molar volume of an idal gas at STP is 22.7 L mol-1 ]

EASY
JEE Main
IMPORTANT

The density of 3M solution of NaCl is 1.0 g mL-1. Molality of the solution is ______×10-2 m (Nearest integer).

Given: Molar mass of Na and Cl is 23 and 35.5 g mol-1 respectively.

HARD
JEE Main
IMPORTANT

The molality of a 10%(v/V) solution of di-bromine solution in CCl4 (carbon tetrachloride) is x '. x= _____×10-2M. (Nearest integer)

[Given : molar mass of Br2=160 g mol-1

atomic mass of C=12 g mol-1

atomic mass of Cl=35.5 g mol-1

density of dibromine =3.2 g cm-3

density of CCl4=1.6 g cm-3