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 negatively charged particles are called	A. Cation B. Radical C. Anion D. Positron
2	Benzene is stable to:	A. Oxidation B. Nitration C. KMnO₄ D. SULPHONATION
3	The amount of products obtained from the balanced chemical equation is regarded as	A. Theoretical yield B. Actual yield C. % yield D. Experimental yield
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	One of the following statements is incorrect	A. Actual yeild is always less than the theoretical yield B. The formula of a compound is not definite C. Law of conservation of mass is applied in stoictiometry D. Boyles law is applied in stoichiometry
6	Hemoglobin contains nearly:	A. 10,000 atoms B. 100 atoms C. 1000 atoms D. 1 atom
7	The mass of Al₂S₃formed when 20 grams Al reacts completely with S is	A. 60 g B. 50 g C. 50.55 g D. 55.55 g
8	Metal tend to lose electrons, becoming:	A. Metals B. Positively charged C. Negatively charged D. (a)And (c)
9	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
10	Molecules of High molecular weight usually greater than 10,000 are called:	A. Macro molecules B. Mega molecules C. Poly molecules D. Gega molecules

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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 volume occupied by 1.4 g of N2 at S.T.P is

Metal tend to lose electrons, becoming:

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

A balloon contains 0.02 gram of H2gas, it contains H2molecules

Which of the following statements is not true?

C6H12O6and C12H22O11 are:

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

A species having positive or negative charge is called:

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

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

The negatively charged particles are called

Which has greater number of moles

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

How many moles of hydrogen atoms does 3.2 g of methane, CH4, contain?

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

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

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

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

A limiting reactant is one which according to the stoichiometric equation

Which statement about molecule is incorrect ?

Benzene is stable to:

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

One mole of C2H5OH contains the number of H-atoms

3.01 x 1022Ag+ions is present in

A limiting reactant is the one which

Objects of the size of an atom can be observed in

Formation of a cation is:

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

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

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

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ECAT Chemistry Chapter 1 Important MCQ's

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The volume occupied by 1.4 g of N₂at S.T.P is

A balloon contains 0.02 gram of H₂gas, it contains H₂molecules

C₆H₁₂O₆and C₁₂H₂₂O₁₁ are:

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

How many moles of hydrogen atoms does 3.2 g of methane, CH₄, contain?

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

One mole of C₂H₅OH contains the number of H-atoms

3.01 x 10²²Ag⁺ions is present in