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

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Question # 1

One mole of ethanol and one mole of ethane have an equal

Question # 2

The number of atoms present in molecule determines its:

Question # 3

The percentage of H is the highest in

Question # 4

CL2, N2 and O2 are:

Question # 5

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

Question # 6

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

Question # 7

Which of the sub-atomic particles is not charged

Question # 8

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

Question # 9

Isotopes of an element differ in

Question # 10

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

Question # 11

3.01 x 1022Ag+ions is present in

Question # 12

Objects of the size of an atom can be observed in

Question # 13

C6H12O6and C12H22O11 are:

Question # 14

In molecules kinetic and potential energies are:

Question # 15

A beaker contains 9 grams of water. The number of H-atoms is

Question # 16

One of the following statements is incorrect

Question # 17

The mass of one mole of proton is

Question # 18

Isotopes differ in

Question # 19

Which one of the following compounds does not have the empirical formula CH2O?

Question # 20

Which one of the following step is not involved in determination of empirical formula

Question # 21

An ion bearing positive charge is called:

Question # 22

The negatively charged particles are called

Question # 23

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

Question # 24

A limiting reactant is the one which

Question # 25

One mole of SO2contains

Question # 26

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

Question # 27

CO+ is an example of

Question # 28

Metal tend to lose electrons, becoming:

Question # 29

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

Question # 30

The branch of science dealing with structure, composition and changes in matter and laws and principles which govern these changes is called as

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ECAT Chemistry Chapter 1 Important MCQ's

Sr.# Question Answer
1 Molecules of High molecular weight usually greater than 10,000 are called:
A. Macro molecules
B. Mega molecules
C. Poly molecules
D. Gega molecules
2 Which of the following statement is correct for a chemical reaction to occur molecules of substances must
A. Collide with each other
B. Collide with energy more than activation energy
C. Collide with energy less than activation energy
D. Collide with high frequency
3 C6H12O6and C12H22O11 are:
A. Mono-atomic molecules
B. Diatomic molecules
C. Poly-atomic molecules
D.

Hetero atomic molecules
4 How many moles of hydrogen atoms does 3.2 g of methane, CH4, contain?
A. 0.02
B. 0.2
C. 0.4
D. 0.8
5

Metal tend to lose electrons, becoming:
A.

Metals

B.

Positively charged

C.

Negatively charged

D.

(a)And (c)
6 Atoms can be evident by use of electron microscope, field ionization microscope and:
A. x-rays
B. Video camera

C. Telescope
D. Compound microscope
7 One mole of SO2contains
A. 6.02 x 1023atoms of oxygen
B. 18.1 x 1023, molecules of SO2
C. 6.02 x 1023 atoms of sulphur
D. 4 gram atoms of SO2
8 The number of atoms present in molecule determines its:
A. Molecularity
B. Atomicity
C. Basicity
D. Acidity
9 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
10 CL2, N2 and O2 are:
A.

Diatomic molecules

B.

Hetero atomic molecules

C.

Poly-atomic molecules

D. Mono-atomic molecules

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