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	An ion bearing positive charge is called:	A. Cation B. Positron C. Anion D. None of above
2	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	A. 207.94 B. 208.24 C. 206.94 D. 207.24
3	The largest number of molecules are present in	A. 3.6 g of H₂O B. 4.8 g of C₂H₅OH C. 2.8 g of CO D. 5.4 g of N₂O₅
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	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
6	Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same	A. Empirical formula B. Number of atoms in a molecules C. Number of isomers D. Relative molecular mass
7	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
8	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
9	The phenomenon of isotropy was first discovered by	A. Soddy B. Rutherford C. Bohr D. Dalton
10	A species having positive or negative charge is called:	A. Electron B. Ion C. Proton D. Atom

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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

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

The number of atoms present in molecule determines its:

CO+ is an example of

Isotopes differ in the

A limiting reactant is one which according to the stoichiometric equation

Which of the following statements is not true?

Al3+is a symbol for aluminium

The atom of an element is

In molecules kinetic and potential energies are:

A molecular ion is formed by

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

The negatively charged particles are called

One mole of ethanol and one mole of ethane have an equal

The phenomenon of isotropy was first discovered by

Isotopes of an element differ in

Objects of the size of an atom can be observed in

The largest number of molecules are present in

Hemoglobin contains nearly:

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

The number of moles of CO2which contain 8.0 g of oxygen

The percentage of H is the highest in

Hemoglobin is 68000 times heavier than:

Which of the sub-atomic particles is not charged

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

NH3, HCL, H2O, HL are:

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

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

A molecule of haemoglobin is made up if nearly

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

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

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ECAT Chemistry Chapter 1 Important MCQ's

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Al³⁺is a symbol for aluminium

NH₃, HCL, H₂O, HL are:

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