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	Matter is defined as any thing which occupies space and:	A. Molecules B. Mass C. Compound D. Molecules
2	Metal tend to lose electrons, becoming:	A. Metals B. Positively charged C. Negatively charged D. (a)And (c)
3	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
4	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
5	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
6	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
7	The amount of products obtained from the balanced chemical equation is regarded as	A. Theoretical yield B. Actual yield C. % yield D. Experimental yield
8	How many moles of oxygen, O₂are needed for the complete combustion of two moles of butane C₄H₁₀?	A. 2 B. 8 C. 10 D. 13
9	When nitrogen is 5.6 grams in NO₂. then number of moles of NO₂is	A. 0.5 B. 0.4 C. 0.04 D. 0.05
10	The value of R(General Gas Constant) is	A. 8.3134 JK^-1mole^-1 B. 1.987 Cal K^-1Mole^-1 C. Both a and b D. 1.987 JK^-1mole^-1

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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

A limiting reactant is the one which

CL2, N2 and O2 are:

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

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

Matter is defined as any thing which occupies space and:

Isotopes differ in

The quantitative relationship between the substances according to balanced equation describes

The value of R(General Gas Constant) is

A limiting reactant is one which according to the stoichiometric equation

Which one of the following statements is not correct

The number of isotopes of gold is

Which of the following statements is not true?

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

One mole of C2H5OH contains the number of H-atoms

One of the following statements is incorrect

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

First atomic theory was put forward by an English school teacher:

A balloon contains 0.02 gram of H2gas, it contains H2molecules

The pressure of vapours when sent to the ionization chamber in mass spectrometer is

The number of atoms present in molecule determines its:

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

The diameter of atoms is of the order:

Hemoglobin is 68000 times heavier than:

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

Where energy is released during a reaction it is

The negatively charged particles are called

The relative abundance of Pb isotopes is 1.5% Pb204, 23.6% Pb206, 22.6% Pb207, 52.3% Pb208The relative atomic mass of Pb is

Isotopes differ in the

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

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

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ECAT Chemistry Chapter 1 Important MCQ's

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CL₂, N₂ and O_{2 are:}

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

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

One mole of C₂H₅OH contains the number of H-atoms

A balloon contains 0.02 gram of H₂gas, it contains H₂molecules

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

The relative abundance of Pb isotopes is 1.5% Pb²⁰⁴, 23.6% Pb²⁰⁶, 22.6% Pb²⁰⁷, 52.3% Pb²⁰⁸The relative atomic mass of Pb is