ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 1 Basic Concepts

Try The MCQ's Test For ECAT Chemistry Chapter 1 Basic Concepts

  • Total Questions30

  • Time Allowed30

Start Test Download PDF

ECAT Chemistry Chapter 1 Basic Concepts

00:00
Question # 1

CO+ is an example of

Question # 2

A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?

Question # 3

An ion bearing positive charge is called:

Question # 4

The number of isotopes of gold is

Question # 5

0.5 mole of CH4and 0.5 mole of SO2gases have equal

Question # 6

The volume occupied by 1.4 g of N2 at S.T.P is

Question # 7

The atom of an element is

Question # 8

The number of atoms present in molecule determines its:

Question # 9

The number of subatomic particles in atoms sidcovered is more than:

Question # 10

The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as

Question # 11

A compound having empirical formula C3H3O and its molecular mass is 110.02. Its molecular formula is

Question # 12

The mass of sulphur which combines with 24 grams oxygen to form SO2

Question # 13

Matter is defined as any thing which occupies space and:

Question # 14

X-ray work has shown that the diameters of atom are of the order of

Question # 15

The empirical formula of a liquid compound is known to be C2H4O. What other information is needed to work out its molecular formula?

Question # 16

Isotopes differ in

Question # 17

A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is

Question # 18

If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required

Question # 19

Which of the sub-atomic particles is not charged

Question # 20

The pressure of vapours when sent to the ionization chamber in mass spectrometer is

Question # 21

Where energy is released during a reaction it is

Question # 22

The number of moles of CO2which contain 8.0 g of oxygen

Question # 23

Each molecule of haemoglobin is 68000 times heavier than one atom of

Question # 24

Atoms can be evident by use of electron microscope, field ionization microscope and:

Question # 25

In molecules kinetic and potential energies are:

Question # 26

3.01 x 1022Ag+ions is present in

Question # 27

Which one of the following step is not involved in determination of empirical formula

Question # 28

The quantitative relationship between the substances according to balanced equation describes

Question # 29

Determination of atomic masses and invention of system of writing symbols was made by:

Question # 30

The percentage of which element in the organic compound is determined by the difference method

Submit

Prepare Complete Set Wise ECAT Chemistry Chapter 1 Basic Concepts MCQs Online With Answers


Topic Test

00:00
Submit

Top Scorers Of ECAT Chemistry Chapter 1 Basic Concepts MCQ`s Test

  • F
    Fatima Tabassum 09 - Jan - 2025 04 Min 47 Sec 100/120
  • Z
    zakee 09u 28 - Nov - 2024 18 Min 56 Sec 95/120
  • H
    habib rehman 17 - Apr - 2026 24 Min 01 Sec 92/120
  • A
    Aroosha Tariq 13 - Nov - 2024 06 Min 02 Sec 90/120
  • Z
    Zainab Tanvir 07 - Dec - 2025 09 Min 10 Sec 80/120
  • I
    ISI?Shadow 16 - Nov - 2024 17 Min 47 Sec 80/120
  • N
    notghouri playz 13 - Dec - 2024 27 Min 04 Sec 80/120
  • T
    Tayyaba Attique 16 - Nov - 2024 07 Min 22 Sec 75/120
  • U
    umerasif 14 - Nov - 2024 105 Min 42 Sec 75/120
  • M
    Muhammad Zain 25 - Apr - 2026 09 Min 22 Sec 72/120
  • A
    agha hamza 22 - Nov - 2025 22 Min 17 Sec 72/120
  • A
    abdullah masood 04 - Dec - 2024 10 Min 54 Sec 70/120
  • M
    Muhammad Awais 01 - Jan - 2025 05 Min 43 Sec 65/120
  • A
    Aqsa afridi 02 - Dec - 2024 24 Min 01 Sec 65/120
  • S
    shahmeer Ch 17 - Jun - 2026 08 Min 55 Sec 64/120

ECAT Chemistry Chapter 1 Important MCQ's

Sr.# Question Answer
1 0.5 mole of CH4and 0.5 mole of SO2gases have equal
A. Volume
B. Mass in grams
C. Total number of atoms
D. Number of molecules
2
Question Image
A. 0 dm3
B. 3 dm3
C. 2 dm3
D. 3 dm3
3 One mole of ethanol and one mole of ethane have an equal
A. Mass
B. Number of atoms
C. Number of electrons
D. Number of molecules
4 The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as
A. chesmistry
B. Geology
C. Physics
D. Mechanics
5 A ring contains 3 gram diamond. The number of C-atoms which a ring contains is
A. 3.01 x 1023
B. 1.5 x 1023
C. 6.02 x 1024
D. 3.01 x 1024
6 When an electron is added to a uni positive ion we get:
A. Cation
B. Molecule
C. Neutral atom
D. Anion
7 Objects of the size of an atom can be observed in
A. An electron microscope
B. An x-ray spectrum
C. Atomic absorption spectrum
D. A visible spectrum
8 An ion bearing positive charge is called:
A. Cation
B. Positron
C. Anion
D. None of above
9 The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to
A. 1.661 x 10-27- Kg
B. 1.661 x 10-24Kg
C. 1.661 x 10-27- g
D. 1.661 x 10-24mg
10 When nitrogen is 5.6 grams in NO2. then number of moles of NO2is
A. 0.5
B. 0.4
C. 0.04
D. 0.05

Test Questions