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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
Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is
Question # 2
First atomic theory was put forward by an English school teacher:
Question # 3
Which one of the following step is not involved in determination of empirical formula
Question # 4
The diameter of atoms is of the order:
Question # 5
Hemoglobin contains nearly:
Question # 6
A molecule of haemoglobin is made up if nearly
Question # 7
Atoms can be evident by use of electron microscope, field ionization microscope and:
Question # 8
A limiting reactant is the one which
Question # 9
The relative abundance of the ions with a definite m/e value is measured by
Question # 10
Molecules of High molecular weight usually greater than 10,000 are called:
Question # 11
The empirical formula of a liquid compound is known to be C2H4O. What other information is needed to work out its molecular formula?
Question # 12
The mass of sulphur which combines with 24 grams oxygen to form SO2
Question # 13
A compound contains 75% carbon and 25% hydrogen, by mass. What is the molecular formula of the compound/
Question # 14
One mole of ethanol and one mole of ethane have an equal
Question # 15
The number of atoms present in molecule determines its:
Question # 16
One mole of C2H5OH contains the number of H-atoms
Question # 17
Al3+is a symbol for aluminium
Question # 18
Which of the sub-atomic particles is not charged
Question # 19
Isotopes differ in the
Question # 20
Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?
Question # 21
The value of R(General Gas Constant) is
Question # 22
If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required
Question # 23
Determination of atomic masses and invention of system of writing symbols was made by:
Question # 24
Isotopes differ in
Question # 25
Smallest particle of an element which may or may not have independent existence is known as:
Question # 26
Metal tend to lose electrons, becoming:
Question # 27
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 # 28
A molecular ion is formed by
Question # 29
Benzene is stable to:
Question # 30
One of the following statements is incorrect
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ECAT Chemistry Chapter 1 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Al3+is a symbol for aluminium |
A. Atom
B. Ion
C. Cation
D. Anion
|
| 2 | Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is |
A. C3H4O3
B. C2H4O3
C. C3H5O4
D. C2H3O1
|
| 3 | 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
|
| 4 | When an electron is added to a uni positive ion we get: |
A. Cation
B. Molecule
C. Neutral atom
D. Anion
|
| 5 | C6H12O6and C12H22O11 are: |
A. Mono-atomic molecules
B. Diatomic molecules
C. Poly-atomic molecules
D.
Hetero atomic molecules |
| 6 | The number of isotopes of gold is |
A. 3
B. 1
C. 2
D. 4
|
| 7 | 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
|
| 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 | What is the volume in cm3of 3.01 x 1023molecules of O2gas at S.T.P |
A. 1000 cm3
B. 11000 cm3
C. 1120 cm3
D. 11200 cm3
|
| 10 | Benzene is stable to: |
A. Oxidation
B. Nitration
C. KMnO4
D. SULPHONATION
|
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...