Some Basic Concepts of Chemistry · Chemistry · COMEDK

Start Practice

MCQ (Single Correct Answer)

1

What mass of Silver chloride, in grams, gets precipitated when $$150 \mathrm{~ml}$$ of $$32 \%$$ solution of Silver nitrate is reacted with $$150 \mathrm{ml}$$ of $$11 \%$$ Sodium chloride solution? Atomic mass in $$\mathrm{g} / \mathrm{mol}: \mathrm{Ag}=108, \mathrm{Na}=23, \mathrm{Cl}=35.5, \mathrm{~N}=14, \mathrm{O}=16$$

COMEDK 2024 Evening Shift
2

Sulphuric acid used in Lead Storage battery has a concentration of $$4.5 \mathrm{~M}$$ and a density of $$1.28 \mathrm{~g} / \mathrm{~ml}$$. The molality of the acid is __________.

COMEDK 2024 Evening Shift
3

A given mass of a hydrocarbon on complete combustion produced $$176 \mathrm{~g}$$ of $$\mathrm{CO}_2$$ and $$90 \mathrm{~g}$$ of $$\mathrm{H}_2 \mathrm{O}$$. What is the Molecular formula of the compound?

COMEDK 2024 Morning Shift
4

$$15 \mathrm{~g}$$ of $$\mathrm{CaCO}_3$$ completely reacts with

COMEDK 2023 Morning Shift
5

$$\mathrm{Mg}(\mathrm{OH})_2$$ is used as an antacid. If a person, suffering from acidity, produces $$2.5 \mathrm{~L}$$ of Gastric juice in a day, approximately how many antacid tablets, each containing $$600 \mathrm{~mg}$$ of $$\mathrm{Mg}(\mathrm{OH})_2$$, will be required to completely neutralise the whole $$\mathrm{HCl}$$ produced in the stomach in one day? (Gastric juice contains $$3.0 \mathrm{~g}$$ of $$\mathrm{HCl}$$ per L). (Atomic masses: $$\mathrm{Mg}=24 \mathrm{~g} / \mathrm{mol}, \mathrm{O}=16 \mathrm{~g} / \mathrm{mol}$$ & $$\mathrm{H}=1 \mathrm{~g} / \mathrm{mol}$$.)

COMEDK 2023 Evening Shift
6

What would be the molarity of one litre solution of 22.2 g of CaCl$$_2$$ ?

COMEDK 2021
7

The number of gram molecules of chlorine in $$6.02\times10^{25}$$ hydrogen chloride molecules is

COMEDK 2020
8

Which one of the following has maximum number of atoms of oxygen?

COMEDK 2020
9

Molarity of a given orthophosphoric acid solution is 3M. It’s normality is

COMEDK 2020
10

The mass of a metal, with equivalent mass 31.75, which would combine with 8 g of oxygen is

COMEDK 2020
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12