ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

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ECAT Chemistry Chapter 1 Important MCQ's

Sr.#	Question	Answer
1	0.5 mole of CH₄and 0.5 mole of SO₂gases have equal	A. Volume B. Mass is gram C. Total number of atoms D. Number of molecules
2	If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required	A. 0.5 B. 1.0 C. 1.5 D. 2.0
3	First atomic theory was put forward by an English school teacher:	A. Maxewell B. Newton C. Sanger D. John Dalton
4	The atom of an element is	A. The smallest particle B. The fundamental particle C. The independent particle D. The charged particle
5	The diameter of atoms is of the order:	A. 2* 10^-5m B. 2* 10^-10m C. 2* 10^-2m D. 2* 10^-3m
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	A species having positive or negative charge is called:	A. Electron B. Ion C. Proton D. Atom
8	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
9	The percentage of which element in the organic compound is determined by the difference method	A. Carbon B. Hydrogen C. Nitrogen D. Oxygen
10	The relative abundance of the ions with a definite m/e value is measured by	A. High pressure of vapours B. Strength of electric current measured C. Quantity of fast moving electrons D. Electron gas

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ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 1 Basic Concepts

ECAT Chemistry Chapter 1 Basic Concepts

The number of atoms present in molecule determines its:

0.5 mole of CH4and 0.5 mole of SO2gases have equal

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

The phenomenon of isotropy was first discovered by

The number of isotopes of gold is

Which statement about molecule is incorrect ?

Determination of atomic masses and invention of system of writing symbols was made by:

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

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

0.5 mole of CH4and 0.5 mole of SO2gases have equal

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

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

A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?

An ion bearing positive charge is called:

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

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

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

Which of the following compounds contains the highest percentage by mass of nitrogen?

Formation of a cation is:

One of the following statements is incorrect

Relative atomic mass of an element is the mass of the element relative to

A molecular ion is formed by

The value of R(General Gas Constant) is

One mole of C2H5OH contains the number of H-atoms

Mass spectrometer measures the

One mole of SO2contains

Which statement about an atom is true ?

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

A compound having empirical formula C3H3O and its molecular mass is 110.02. Its molecular formula is

Macromolecules are

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ECAT Chemistry Chapter 1 Important MCQ's

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0.5 mole of CH₄and 0.5 mole of SO₂gases have equal

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

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

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

One mole of C₂H₅OH contains the number of H-atoms

One mole of SO₂contains

A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is