ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

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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ECAT Chemistry Chapter 1 Basic Concepts

00:00
Question # 1

Which of the sub-atomic particles is not charged

Question # 2

The pressure of vapours when sent to the ionization chamber in mass spectrometer is

Question # 3

Which statement about an atom is true ?

Question # 4

The number of atoms present in molecule determines its:

Question # 5

The mass of sulphur which combines with 24 grams oxygen to form SO2

Question # 6

A balloon contains 0.02 gram of H2gas, it contains H2molecules

Question # 7

Benzene is stable to:

Question # 8

First atomic theory was put forward by an English school teacher:

Question # 9

Atoms can be evident by use of electron microscope, field ionization microscope and:

Question # 10

The empirical formula of a liquid compound is known to be C2H4O. What other information is needed to work out its molecular formula?

Question # 11

The volume occupied by 1.4 g of N2 at S.T.P is

Question # 12

The number of subatomic particles in atoms sidcovered is more than:

Question # 13

The relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas

Question # 14

3.01 x 1022Ag+ions is present in

Question # 15

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 # 16

One mole of C2H5OH contains the number of H-atoms

Question # 17

Which of the following statements is not true?

Question # 18

How many moles of hydrogen atoms does 3.2 g of methane, CH4, contain?

Question # 19

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

Question # 20

Atoms and molecules can either gain or lose electrons, forming charge particles called:

Question # 21

The isotopes of an element

Question # 22

The wave length of visible light is 500 nm. In S.I. unit this value is

Question # 23

A limiting reactant is the one which

Question # 24

The number of isotopes of gold is

Question # 25

Which has greater number of moles

Question # 26

The percentage of which element in the organic compound is determined by the difference method

Question # 27

A compound contains 75% carbon and 25% hydrogen, by mass. What is the molecular formula of the compound/

Question # 28

Molecules of High molecular weight usually greater than 10,000 are called:

Question # 29

One mole of SO2contains

Question # 30

A limiting reactant is one which according to the stoichiometric equation

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ECAT Chemistry Chapter 1 Important MCQ's

Sr.# Question Answer
1 The phenomenon of isotropy was first discovered by
A. Soddy
B. Rutherford
C. Bohr
D. Dalton
2 The mass of one mole of proton is
A. 1.008 g
B. 0.184 g
C. 1.673 g
D. 1.008 mg
3 Formation of a cation is:
A. Exothermic process
B. Non-endothermic process
C. Endothermic process
D. None of above
4 1.12 dm3of N2gas at S.T.P. has mass of N2gas
A. 2.8 g
B. 2.4 g
C. 1.4 g
D. 14 g
5 NH3, HCL, H2O, HL are:
A.

Diatomic molecules

B.

Poly-atomic molecules

C.

Mono-atomic molecules

D.

Hetero atomic molecules
6 The number of moles of CO2which contain 8.0 g of oxygen
A. 0.25
B. 0.50
C. 1.0
D. 1.50
7 The quantitative relationship between the substances according to balanced equation describes
A. Reversible reactions
B. Stoichiometry
C. Limiting reacting
D. Percentage composition
8 Which of the sub-atomic particles is not charged
A. Electron
B. Proton
C. Neutron
D. All of them
9 The mass of Al2S3formed when 20 grams Al reacts completely with S is
A. 60 g
B. 50 g
C. 50.55 g
D. 55.55 g
10 Isotopes differ in the
A. Number of neutrons
B. Number of protons
C. Number of electrons
D. Number of atoms

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