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 relative atomic mass of chlorine is 35.5. What is the mass of 2 mol of chlorine gas	A. 142 g B. 71 g C. 35.5 g D. 18.75 g
2	The number of atoms present in molecule determines its:	A. Molecularity B. Atomicity C. Basicity D. Acidity
3	An ion bearing positive charge is called:	A. Cation B. Positron C. Anion D. None of above
4	He Ar and Ne are:	A. Mono-atomic molecules B. Hetero atomic molecules C. Poly-atomic molecules D. Diatomic molecules
5	Benzene is stable to:	A. Oxidation B. Nitration C. KMnO₄ D. SULPHONATION
6	A species having positive or negative charge is called:	A. Electron B. Ion C. Proton D. Atom
7		A. 300 cm³ B. 200 cm³ C. 150 cm³ D. 100 cm³
8		A. 8 g B. 16 g C. 32 g D. 24 g
9	What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al₂O₃?	A. 26 g B. 127 g C. 51 g D. 108 g
10	The mass of one mole of proton is	A. 1.008 g B. 0.184 g C. 1.673 g D. 1.008 mg

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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 percentage of H is the highest in

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

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

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

A limiting reactant is the one which

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

If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required

0.5 mole of CH4and 0.5 mole of SO2gases have equal

Metal tend to lose electrons, becoming:

The number of atoms present in molecule determines its:

The number of subatomic particles in atoms sidcovered is more than:

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

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

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

A balloon contains 0.02 gram of H2gas, it contains H2molecules

X-ray work has shown that the diameters of atom are of the order of

CL2, N2 and O2 are:

A molecular ion is formed by

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

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

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

Which has greater number of moles

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

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?

3.01 x 1022Ag+ions is present in

The phenomenon of isotropy was first discovered by

Molecules of High molecular weight usually greater than 10,000 are called:

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

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

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ECAT Chemistry Chapter 1 Important MCQ's

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

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

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

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 balloon contains 0.02 gram of H₂gas, it contains H₂molecules

CL₂, N₂ and O_{2 are:}

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

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

3.01 x 10²²Ag⁺ions is present in

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