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 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
2		A. 99.2% B. 99.5% C. 90.5% D. 96.2%
3		A. 300 cm³ B. 200 cm³ C. 150 cm³ D. 100 cm³
4	Isotopes differ in	A. properties which depend upon mass B. arrangement of electrons in orbitals C. chemical properties D. the extent to which they may be affected in electric fields
5	A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is	A. C₃H₃O B. C₆H₆O₂ C. C₉H₉O₃ D. C₃H₆O₂
6	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
7	In molecules kinetic and potential energies are:	A. Definite B. Moderate C. Indefinite D. None of above
8	Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is	A. C₃H₄O₃ B. C₂H₄O₃ C. C₃H₅O₄ D. C₂H₃O₁
9	A molecular ion is formed by	A. Passing a high energy electron beam through gaseous molecule B. Dissolving a salt i dilute acid C. Passing electric current through molten salt D. Passing electricity through aqueous solutions
10	Metal tend to lose electrons, becoming:	A. Metals B. Positively charged C. Negatively charged D. (a)And (c)

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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

1.12 dm3of N2gas at S.T.P. has mass of N2gas

Isotopes differ in the

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

The mass of Al2S3formed when 20 grams Al reacts completely with S is

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

The number of isotopes of gold is

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

C6H12O6and C12H22O11 are:

He Ar and Ne are:

Benzene is stable to:

The number of moles of CO2which contain 8.0 g of oxygen

The negatively charged particles are called

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

A molecular ion is formed by

The diameter of atoms is of the order:

CO+ is an example of

One mole of SO2contains

Smallest particle of an element which may or may not have independent existence is known as:

CL2, N2 and O2 are:

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

The largest number of molecules are present in

The mass of one mole of proton is

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

Mass spectrometer measures the

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

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

A species having positive or negative charge is called:

Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

Covalent compound s mostly exist in the form of:

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ECAT Chemistry Chapter 1 Important MCQ's

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1.12 dm³of N₂gas at S.T.P. has mass of N₂gas

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

The mass of Al₂S₃formed when 20 grams Al reacts completely with S is

C₆H₁₂O₆and C₁₂H₂₂O₁₁ are:

One mole of SO₂contains

CL₂, N₂ and O_{2 are:}

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

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