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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
What is the volume in cm3of 3.01 x 1023molecules of O2gas at S.T.P
Question # 2
A beaker contains 9 grams of water. The number of H-atoms is
Question # 3
Al3+is a symbol for aluminium
Question # 4
How many moles of hydrogen atoms does 3.2 g of methane, CH4, contain?
Question # 5
One mole of C2H5OH contains the number of H-atoms
Question # 6
Benzene is stable to:
Question # 7
The largest number of molecules are present in
Question # 8
Isotopes differ in the
Question # 9
CL2, N2 and O2 are:
Question # 10
Objects of the size of an atom can be observed in
Question # 11
The amount of products obtained from the balanced chemical equation is regarded as
Question # 12
Isotopes differ in
Question # 13
The wave length of visible light is 500 nm. In S.I. unit this value is
Question # 14
Which one of the following step is not involved in determination of empirical formula
Question # 15
0.5 mole of CH4and 0.5 mole of SO2gases have equal
Question # 16
Which has greater number of moles
Question # 17
The number of moles of CO2which contain 8.0 g of oxygen
Question # 18
NH3, HCL, H2O, HL are:
Question # 19
The value of R(General Gas Constant) is
Question # 20
A molecular ion is formed by
Question # 21
First atomic theory was put forward by an English school teacher:
Question # 22
A balloon contains 0.02 gram of H2gas, it contains H2molecules
Question # 23
How many moles of oxygen, O2are needed for the complete combustion of two moles of butane C4H10?
Question # 24
Which of the sub-atomic particles is not charged
Question # 25
One mole of ethanol and one mole of ethane have an equal
Question # 26
The number of isotopes of gold is
Question # 27
CO+ is an example of
Question # 28
0.5 mole of CH4and 0.5 mole of SO2gases have equal
Question # 29
Which of the following statements is not true?
Question # 30
The negatively charged particles are called
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ECAT Chemistry Chapter 1 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | CL2, N2 and O2 are: |
A.
Diatomic molecules
B.
Hetero atomic molecules
C.
Poly-atomic molecules
D. Mono-atomic molecules
|
| 2 | A species having positive or negative charge is called: |
A. Electron
B. Ion
C. Proton
D. Atom
|
| 3 | Which has greater number of moles |
A. 0.1 g sodium
B. 6.02 x 1020atoms of magnesium
C. 20 cm30.1mole per dm3of NaOH
D. 12.2 dm3of nitrogen at standard
[ArNa = 23, Mg = 24, O = 16]
|
| 4 | The empirical formula of a liquid compound is known to be C2H4O. What other information is needed to work out its molecular formula? |
A. The percentage composition of the compound
B. The relative molecular mass of the compound
C. The density of the compound
D. The volume occupied by one mole of the compound
|
| 5 | Al3+is a symbol for aluminium |
A. Atom
B. Ion
C. Cation
D. Anion
|
| 6 | Isotopes differ in |
A. properties which depend upon mass
B. arrangement of electrons in orbitals
C. chemical properties
D. the extent to which they may be affected in electric fields
|
| 7 | A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is |
A. 46
B. 78
C. 110
D. 180
|
| 8 | The number of atoms present in molecule determines its: |
A. Molecularity
B. Atomicity
C. Basicity
D. Acidity
|
| 9 | Atoms and molecules can either gain or lose electrons, forming charge particles called: |
A.
Positrons
B.
Photons
C.
Ions
D.
Electrons |
| 10 | When an electron is added to a uni positive ion we get: |
A. Cation
B. Molecule
C. Neutral atom
D. Anion
|
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...