ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

Top Scorers Of ECAT Chemistry Chapter 1 Basic Concepts MCQ`s Test

• F

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• H

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• A

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• I

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• N

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• A

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• A

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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	NH3, HCL, H2O, HL are:	A. Diatomic molecules B. Poly-atomic molecules C. Mono-atomic molecules D. Hetero atomic molecules
3	The diameter of atoms is of the order:	A. 2* 10-5m B. 2* 10-10 m C. 2* 10-2m D. 2* 10-3m
4	What is the volume in cm3of 3.01 x 1023molecules of O2gas at S.T.P	A. 1000 cm3 B. 11000 cm3 C. 1120 cm3 D. 11200 cm3
5	The number of subatomic particles in atoms sidcovered is more than:	A. 110 B. 100 C. 125 D. 90
6	Determination of atomic masses and invention of system of writing symbols was made by:	A. J. Berzelius B. Democritus C. Dalton D. None of above
7	Macromolecules are	A. organic molecules B. High molecular mass molecules C. Natural compounds D. Rarely occurring molecules
8	A limiting reactant is the one which	A. Is taken in lesser quantity in grams as compared to other reactants B. Is taken in lesser quantity in volume as compared to other reactants C. Gives the maximum amount of the product which is required D. Gives the minimum amount of the product under consideration
9		A. 0 dm3 B. 3 dm3 C. 2 dm3 D. 3 dm3
10	The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to	A. 1.661 x 10-27- Kg B. 1.661 x 10-24Kg C. 1.661 x 10-27- g D. 1.661 x 10-24mg