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	The empirical formula of a compound is CH₂O. What may be the compound	A. C₂H₅OH B. C₆H₅OH C. HCOOH
2	One mole of ethanol and one mole of ethane have an equal	A. Mass B. Number of atoms C. Number of electrons D. Number of molecules
3	A beaker contains 9 grams of water. The number of H atoms is	A. 6.02 x 10²³ B. 3.01 x 10²³ C. 6.02 x 10²⁴ D. 3.01 x 10²⁴
4	Isotopes of an element differ in	A. Number of protons B. Number of electrons C. Number of neutrons D. Number of electrons and protons
5	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
6	Covalent compound s mostly exist in the form of:	A. Protons B. Atoms C. Neutrons D. Molecules
7	X-ray work has shown that the diameters of atom are of the order of	A. 8 x 10^-10m B. 2 x 10^-10m C. 8 x 10^-8m D. 2 x 10^-8m
8	Benzene is stable to:	A. Oxidation B. Nitration C. KMnO₄ D. SULPHONATION
9	The number of atoms present in molecule determines its:	A. Molecularity B. Atomicity C. Basicity D. Acidity
10	The volume occupied by 1.4 g of N₂at S.T.P is	A. 2.24 dm³ B. 22.4 dm³ C. 1.12 dm³ D. 112 cm³

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

0.5 mole of CH4and 0.5 mole of SO2gases have equal

One mole of C2H5OH contains the number of H-atoms

Which has greater number of moles

Which statement about an atom is true ?

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

The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to

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

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

The number of isotopes of gold is

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

0.5 mole of CH4and 0.5 mole of SO2gases have equal

3.01 x 1022Ag+ions is present in

A molecular ion is formed by

He Ar and Ne are:

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

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

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

One mole of SO2contains

CL2, N2 and O2 are:

In molecules kinetic and potential energies are:

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

Covalent compound s mostly exist in the form of:

The value of R(General Gas Constant) is

The percentage of H is the highest in

The phenomenon of isotropy was first discovered by

Benzene is stable to:

The isotopes of an element

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

The diameter of atoms is of the order:

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ECAT Chemistry Chapter 1 Important MCQ's

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One mole of C₂H₅OH contains the number of H-atoms

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

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

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

0.5 mole of CH₄and 0.5 mole of SO₂gases have equal

3.01 x 10²²Ag⁺ions is present in

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

One mole of SO₂contains

CL₂, N₂ and O_{2 are:}

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