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 mass of sulphur which combines with 24 grams oxygen to form SO₂	A. 32 gram B. 24 gram C. 8 gram D. 12 gram
2	Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?	A. Carbon monoxide B. Diamond C. Ethane D. Methane
3	Where energy is released during a reaction it is	A. Exothermic reaction B. Endothermic reaction C. A free radical reaction D. A bond breaking reaction
4	A molecule of haemoglobin is made up if nearly	A. 10,000 atoms B. 50,000 atoms C. 2500 atoms D. 1500 atoms
5	A balloon contains 0.02 gram of H₂gas, it contains H₂molecules	A. 6.02 x 10²³ B. 3.01 x 10²² C. 6.02 x 10²¹ D. 3.01 x 10²¹
6	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
7	When 0.1 g of magnesium is treated with an excess of hydrochloric acid, what volume of gas at room temperature and pressure will be produced	A. 10 cm³ B. 25 cm³ C. 48 cm³ D. 100 cm³
8	CL₂, N₂ and O_{2 are:}	A. Diatomic molecules B. Hetero atomic molecules C. Poly-atomic molecules D. Mono-atomic molecules
9	In molecules kinetic and potential energies are:	A. Definite B. Moderate C. Indefinite D. None of above
10	The amount of products obtained from the balanced chemical equation is regarded as	A. Theoretical yield B. Actual yield C. % yield D. Experimental yield

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

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

0.5 mole of CH4and 0.5 mole of SO2gases have equal

X-ray work has shown that the diameters of atom are of the order of

The number of atoms present in molecule determines its:

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

What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al2O3?

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

Each molecule of haemoglobin is 68000 times heavier than one atom of

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

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

The value of R(General Gas Constant) is

Benzene is stable to:

Mass spectrometer measures the

The phenomenon of isotropy was first discovered by

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

Which statement about molecule is incorrect ?

Hemoglobin is 68000 times heavier than:

Hemoglobin contains nearly:

The mass of one mole of proton is

Al3+is a symbol for aluminium

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

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

Isotopes differ in

Where energy is released during a reaction it is

A compound contains 75% carbon and 25% hydrogen, by mass. What is the molecular formula of the compound/

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

A limiting reactant is the one which

A ring contains 3 gram diamond. The number of C-atoms which a ring contains is

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

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ECAT Chemistry Chapter 1 Important MCQ's

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

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

0.5 mole of CH₄and 0.5 mole of SO₂gases have equal

What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al₂O₃?

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

Al³⁺is a symbol for aluminium

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