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	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
2	The number of subatomic particles in atoms sidcovered is more than:	A. 110 B. 100 C. 125 D. 90
3	Matter is defined as any thing which occupies space and:	A. Molecules B. Mass C. Compound D. Molecules
4	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
5	The empirical formula of a liquid compound is known to be C₂H₄O. What other information is needed to work out its molecular formula?	A. The percentage composition of the compound B. The relative molecular mass of the compound C. The density of the compound D. The volume occupied by one mole of the compound
6	Which of the following statements is not true?	A. Isotopes with even atomic masses are comparatively abundant B. Isotopes with even atomic masses are comparatively abundant C. Isotopes with even atomic masses and even atomic numbers are comparatively abundant D. Isotopes with even atomic masses and odd atomic number are comparatively abundant
7	Which statement about molecule is incorrect ?	A. Molecules of a substance are similar B. Hemoglobin is a homo atomic molecules C. Oxygen molecule is a macro molecule D. It exist independently
8	Molecules of High molecular weight usually greater than 10,000 are called:	A. Macro molecules B. Mega molecules C. Poly molecules D. Gega molecules
9	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
10		A. 0 dm³ B. 3 dm³ C. 2 dm³ D. 3 dm³

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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

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

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

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

Objects of the size of an atom can be observed in

Isotopes differ in

The number of moles of CO2which contain 8.0 g of oxygen

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

The diameter of atoms is of the order:

Which has greater number of moles

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

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

Mass spectrometer measures the

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

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

The relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas

Formation of a cation is:

Which statement about an atom is true ?

The isotopes of an element

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

The quantitative relationship between the substances according to balanced equation describes

C6H12O6and C12H22O11 are:

Isotopes differ in the

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

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

One mole of C2H5OH contains the number of H-atoms

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

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

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

A species having positive or negative charge is called:

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

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ECAT Chemistry Chapter 1 Important MCQ's

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

C₆H₁₂O₆and C₁₂H₂₂O₁₁ are:

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

One mole of C₂H₅OH contains the number of H-atoms

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