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

A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is

Question # 2

How many moles of oxygen, O2are needed for the complete combustion of two moles of butane C4H10?

Question # 3

Formation of a cation is:

Question # 4

The value of R(General Gas Constant) is

Question # 5

The relative abundance of the ions with a definite m/e value is measured by

Question # 6

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

Question # 7

The mass of one mole of proton is

Question # 8

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

Question # 9

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

Question # 10

The number of atoms present in molecule determines its:

Question # 11

When an electron is added to a uni positive ion we get:

Question # 12

When nitrogen is 5.6 grams in NO2. then number of moles of NO2is

Question # 13

Which one of the following statements is not correct

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

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

Question # 16

Hemoglobin is 68000 times heavier than:

Question # 17

3.01 x 1022Ag+ions is present in

Question # 18

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

Question # 19

Isotopes differ in the

Question # 20

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

Question # 21

He Ar and Ne are:

Question # 22

Isotopes of an element differ in

Question # 23

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

Question # 24

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

Question # 25

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

Question # 26

The atom of an element is

Question # 27

Which statement about an atom is true ?

Question # 28

Covalent compound s mostly exist in the form of:

Question # 29

The empirical formula of a compound is CH2O. What may be the compound

Question # 30

Which of the sub-atomic particles is not charged

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ECAT Chemistry Chapter 1 Important MCQ's

Sr.# Question Answer
1
Question Image
A. 0 dm3
B. 3 dm3
C. 2 dm3
D. 3 dm3
2 Which statement about an atom is true ?
A. The number of neutrons is not equal to number of electrons
B. Mass number is less than atomic number
C. All the elements have only one mass number
D. Mass number can be equal to atomic number
3
Question Image
A. N2O4is limiting reactant
B. N2H4is the limiting reactant
C. Reactants are completely converted to the products
D. Reactions is reversible
4
Question Image
A. 300 cm3
B. 200 cm3
C. 150 cm3
D. 100 cm3
5 The mass of sulphur which combines with 24 grams oxygen to form SO2
A. 32 gram
B. 24 gram
C. 8 gram
D. 12 gram
6 Which one of the following compounds does not have the empirical formula CH2O?
A. Ethanoic acid, CH3CO2H
B. Ethanol, CH3CH2OH
C. Glucose, C6H12O6
D. Methanal, HCHO
7 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
8 Al3+is a symbol for aluminium
A. Atom
B. Ion
C. Cation
D. Anion
9

Metal tend to lose electrons, becoming:
A.

Metals

B.

Positively charged

C.

Negatively charged

D.

(a)And (c)
10 Benzene is stable to:
A. Oxidation
B. Nitration
C. KMnO4
D. SULPHONATION

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