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MCQ's Test For ECAT Chemistry Chapter 1 Basic Concepts
Try The MCQ's Test For ECAT Chemistry Chapter 1 Basic Concepts
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Total Questions30
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Time Allowed30
ECAT Chemistry Chapter 1 Basic Concepts
00:00
Question # 1
An ion bearing positive charge is called:
Question # 2
Where energy is released during a reaction it is
Question # 3
Isotopes differ in the
Question # 4
A compound having empirical formula C3H3O and its molecular mass is 110.02. Its molecular formula is
Question # 5
Which one of the following step is not involved in determination of empirical formula
Question # 6
The atom of an element is
Question # 7
Covalent compound s mostly exist in the form of:
Question # 8
One of the following statements is incorrect
Question # 9
What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al2O3?
Question # 10
Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same
Question # 11
Which statement about an atom is true ?
Question # 12
0.5 mole of CH4and 0.5 mole of SO2gases have equal
Question # 13
The negatively charged particles are called
Question # 14
A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?
Question # 15
The volume occupied by 1.4 g of N2 at S.T.P is
Question # 16
3.01 x 1022Ag+ions is present in
Question # 17
Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?
Question # 18
One mole of SO2contains
Question # 19
Objects of the size of an atom can be observed in
Question # 20
Macromolecules are
Question # 21
Which of the following statement is correct for a chemical reaction to occur molecules of substances must
Question # 22
A balloon contains 0.02 gram of H2gas, it contains H2molecules
Question # 23
Benzene is stable to:
Question # 24
A molecule of haemoglobin is made up if nearly
Question # 25
A ring contains 3 gram diamond. The number of C-atoms which a ring contains is
Question # 26
The relative abundance of the ions with a definite m/e value is measured by
Question # 27
The value of R(General Gas Constant) is
Question # 28
The empirical formula of a liquid compound is known to be C2H4O. What other information is needed to work out its molecular formula?
Question # 29
A compound contains 75% carbon and 25% hydrogen, by mass. What is the molecular formula of the compound/
Question # 30
How many moles of oxygen, O2are needed for the complete combustion of two moles of butane C4H10?
Top Scorers Of ECAT Chemistry Chapter 1 Basic Concepts MCQ`s Test
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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 -
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S shahmeer Ch 17 - Jun - 2026 08 Min 55 Sec 64/120
ECAT Chemistry Chapter 1 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | A compound having empirical formula C3H3O and its molecular mass is 110.02. Its molecular formula is |
A. C3H3O
B. C6H6O2
C. C9H9O3
D. C3H6O2
|
| 2 | Formation of a cation is: |
A. Exothermic process
B. Non-endothermic process
C. Endothermic process
D. None of above
|
| 3 | The relative abundance of the ions with a definite m/e value is measured by |
A. High pressure of vapours
B. Strength of electric current measured
C. Quantity of fast moving electrons
D. Electron gas
|
| 4 | Benzene is stable to: |
A. Oxidation
B. Nitration
C. KMnO4
D. SULPHONATION
|
| 5 | Each molecule of haemoglobin is 68000 times heavier than one atom of |
A. C
B. H
C. N
D. O
|
| 6 | A molecular ion is formed by |
A. Passing a high energy electron beam through gaseous molecule
B. Dissolving a salt i dilute acid
C. Passing electric current through molten salt
D. Passing electricity through aqueous solutions
|
| 7 | Which of the sub-atomic particles is not charged |
A. Electron
B. Proton
C. Neutron
D. All of them
|
| 8 | A compound contains 75% carbon and 25% hydrogen, by mass. What is the molecular formula of the compound/ |
A. C3H8
B. CH4
C. C2H4
D. C2H6
|
| 9 | The largest number of molecules are present in |
A. 3.6 g of H2O
B. 4.8 g of C2H5OH
C. 2.8 g of CO
D. 5.4 g of N2O5
|
| 10 | Which one of the following step is not involved in determination of empirical formula |
A. Determination % of each element
B. Determination of gram atom of each element
C. Determination of isotopes of each element
D. Determination of atomic ratio of element
|
Test Questions
Share your comments & questions here
ishaq
05 Mar 2019where is the syllabus or preparation material
ishaq
05 Mar 2019...
Mehwish
30 Jun 2018...