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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
3.01 x 1022Ag+ions is present in
Question # 2
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 # 3
Metal tend to lose electrons, becoming:
Question # 4
The empirical formula of a liquid compound is known to be C2H4O. What other information is needed to work out its molecular formula?
Question # 5
The mass of sulphur which combines with 24 grams oxygen to form SO2
Question # 6
Hemoglobin contains nearly:
Question # 7
Isotopes differ in
Question # 8
Covalent compound s mostly exist in the form of:
Question # 9
Which one of the following statements is not correct
Question # 10
The wave length of visible light is 500 nm. In S.I. unit this value is
Question # 11
A beaker contains 9 grams of water. The number of H atoms is
Question # 12
Atoms and molecules can either gain or lose electrons, forming charge particles called:
Question # 13
Al3+is a symbol for aluminium
Question # 14
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 # 15
Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same
Question # 16
Each molecule of haemoglobin is 68000 times heavier than one atom of
Question # 17
The number of moles of CO2which contain 8.0 g of oxygen
Question # 18
When nitrogen is 5.6 grams in NO2. then number of moles of NO2is
Question # 19
A limiting reactant is the one which
Question # 20
Which of the sub-atomic particles is not charged
Question # 21
Atoms can be evident by use of electron microscope, field ionization microscope and:
Question # 22
The largest number of molecules are present in
Question # 23
Which of the following statements is not true?
Question # 24
The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to
Question # 25
Which one of the following step is not involved in determination of empirical formula
Question # 26
What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al2O3?
Question # 27
Mass spectrometer measures the
Question # 28
Which statement about an atom is true ?
Question # 29
Molecules of High molecular weight usually greater than 10,000 are called:
Question # 30
The isotopes of an element
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ECAT Chemistry Chapter 1 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The pressure of vapours when sent to the ionization chamber in mass spectrometer is |
A. 10-5to 10-6torr
B. 10-6to 10-7torr
C. 10-7to 10-8torr
D. 10-3to 10-4torr
|
| 2 | Benzene is stable to: |
A. Oxidation
B. Nitration
C. KMnO4
D. SULPHONATION
|
| 3 | 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
|
| 4 | A limiting reactant is one which according to the stoichiometric equation |
A. Has excess mass
B. Has least mass
C. Has excess number of moles
D. Has least number of moles
|
| 5 | Molecules of High molecular weight usually greater than 10,000 are called: |
A. Macro molecules
B. Mega molecules
C. Poly molecules
D. Gega molecules
|
| 6 | A molecule of haemoglobin is made up if nearly |
A. 10,000 atoms
B. 50,000 atoms
C. 2500 atoms
D. 1500 atoms
|
| 7 | X-ray work has shown that the diameters of atom are of the order of |
A. 8 x 10-10m
B. 2 x 10-10m
C. 8 x 10-8m
D. 2 x 10-8 m
|
| 8 | The amount of products obtained from the balanced chemical equation is regarded as |
A. Theoretical yield
B. Actual yield
C. % yield
D. Experimental yield
|
| 9 | Al3+is a symbol for aluminium |
A. Atom
B. Ion
C. Cation
D. Anion
|
| 10 |
Hemoglobin is 68000 times heavier than: |
A. Oxygen atom
B. Nitrogen atom
C. Carbon atom
D. Hydrogen atom
|
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...