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
2	The atom of an element is	A. The smallest particle B. The fundamental particle C. The independent particle D. The charged particle
3	C₆H₁₂O₆and C₁₂H₂₂O₁₁ are:	A. Mono-atomic molecules B. Diatomic molecules C. Poly-atomic molecules D. Hetero atomic molecules
4	A beaker contains 9 grams of water. The number of H atoms is	A. 6.02 x 10²³ B. 3.01 x 10²³ C. 6.02 x 10²⁴ D. 3.01 x 10²⁴
5	Which of the sub-atomic particles is not charged	A. Electron B. Proton C. Neutron D. All of them
6	The empirical formula of a compound is CH₂O. What may be the compound	A. C₂H₅OH B. C₆H₅OH C. HCOOH
7	Molecules of High molecular weight usually greater than 10,000 are called:	A. Macro molecules B. Mega molecules C. Poly molecules D. Gega molecules
8	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
9	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
10	1.12 dm³of N₂gas at S.T.P. has mass of N₂gas	A. 2.8 g B. 2.4 g C. 1.4 g D. 14 g

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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 largest number of molecules are present in

Isotopes differ in the

3.01 x 1022Ag+ions is present in

CO+ is an example of

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

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

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

When nitrogen is 5.6 grams in NO2. then number of moles of NO2is

A compound having empirical formula C3H3O and its molecular mass is 110.02. Its molecular formula is

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

Formation of a cation is:

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

The quantitative relationship between the substances according to balanced equation describes

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

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

Which one of the following step is not involved in determination of empirical formula

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

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

0.5 mole of CH4and 0.5 mole of SO2gases have equal

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

Covalent compound s mostly exist in the form of:

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

Metal tend to lose electrons, becoming:

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

One mole of C2H5OH contains the number of H-atoms

0.5 mole of CH4and 0.5 mole of SO2gases have equal

A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is

Isotopes differ in

The number of isotopes of gold is

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ECAT Chemistry Chapter 1 Important MCQ's

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3.01 x 10²²Ag⁺ions is present in

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

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

When nitrogen is 5.6 grams in NO₂. then number of moles of NO₂is

A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is

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

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

0.5 mole of CH₄and 0.5 mole of SO₂gases have equal

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

One mole of C₂H₅OH contains the number of H-atoms