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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
A limiting reactant is one which according to the stoichiometric equation
Question # 2
A compound having empirical formula C3H3O and its molecular mass is 110.02. Its molecular formula is
Question # 3
Mass spectrometer measures the
Question # 4
A beaker contains 9 grams of water. The number of H atoms is
Question # 5
In molecules kinetic and potential energies are:
Question # 6
Matter is defined as any thing which occupies space and:
Question # 7
The percentage of H is the highest in
Question # 8
The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as
Question # 9
One mole of SO2contains
Question # 10
X-ray work has shown that the diameters of atom are of the order of
Question # 11
Each molecule of haemoglobin is 68000 times heavier than one atom of
Question # 12
C6H12O6and C12H22O11 are:
Question # 13
Benzene is stable to:
Question # 14
A species having positive or negative charge is called:
Question # 15
A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?
Question # 16
Where energy is released during a reaction it is
Question # 17
A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is
Question # 18
Metal tend to lose electrons, becoming:
Question # 19
A balloon contains 0.02 gram of H2gas, it contains H2molecules
Question # 20
Which one of the following compounds does not have the empirical formula CH2O?
Question # 21
Isotopes differ in
Question # 22
He Ar and Ne are:
Question # 23
Which statement about molecule is incorrect ?
Question # 24
The largest number of molecules are present in
Question # 25
The relative abundance of Pb isotopes is 1.5% Pb204, 23.6% Pb206, 22.6% Pb207, 52.3% Pb208The relative atomic mass of Pb is
Question # 26
Isotopes differ in the
Question # 27
When 0.1 g of magnesium is treated with an excess of hydrochloric acid, what volume of gas at room temperature and pressure will be produced
Question # 28
Which one of the following step is not involved in determination of empirical formula
Question # 29
The percentage of which element in the organic compound is determined by the difference method
Question # 30
The relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas
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 -
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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 |
The diameter of atoms is of the order: |
A. 2* 10-5m
B.
2* 10-10 m
C. 2* 10-2m
D. 2* 10-3m
|
| 2 | The phenomenon of isotropy was first discovered by |
A. Soddy
B. Rutherford
C. Bohr
D. Dalton
|
| 3 | Which of the following compounds contains the highest percentage by mass of nitrogen? |
A. Ammonia, NH3
B. Ammonium carbamate, NH2CO2NH4
C. Ammonium carbonate, (NH4)2CO3
D. Hydrazine, N2H4
|
| 4 | The amount of products obtained from the balanced chemical equation is regarded as |
A. Theoretical yield
B. Actual yield
C. % yield
D. Experimental yield
|
| 5 |
|
|
| 6 | Hemoglobin contains nearly: |
A. 10,000 atoms
B. 100 atoms
C. 1000 atoms
D. 1 atom
|
| 7 | CL2, N2 and O2 are: |
A.
Diatomic molecules
B.
Hetero atomic molecules
C.
Poly-atomic molecules
D. Mono-atomic molecules
|
| 8 | Which of the following statement is correct for a chemical reaction to occur molecules of substances must |
A. Collide with each other
B. Collide with energy more than activation energy
C. Collide with energy less than activation energy
D. Collide with high frequency
|
| 9 | One of the following statements is incorrect |
A. Actual yeild is always less than the theoretical yield
B. The formula of a compound is not definite
C. Law of conservation of mass is applied in stoictiometry
D. Boyles law is applied in stoichiometry
|
| 10 | The isotopes of an element |
A. Possess same mass number
B. Possess same number of protons
C. Do not possess same chemical properties
D. May or may not possess same chemical properties
|
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...