ECAT Pre Engineering Chemistry Chapter 1 MCQ Test With Answer

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

• F

  Fatima Tabassum 09 - Jan - 2025 04 Min 47 Sec 100/120

• Z

  zakee 09u 28 - Nov - 2024 18 Min 56 Sec 95/120

• H

  habib rehman 17 - Apr - 2026 24 Min 01 Sec 92/120

• A

  Aroosha Tariq 13 - Nov - 2024 06 Min 02 Sec 90/120

• Z

  Zainab Tanvir 07 - Dec - 2025 09 Min 10 Sec 80/120

• I

  ISI?Shadow 16 - Nov - 2024 17 Min 47 Sec 80/120

• N

  notghouri playz 13 - Dec - 2024 27 Min 04 Sec 80/120

• T

  Tayyaba Attique 16 - Nov - 2024 07 Min 22 Sec 75/120

• U

  umerasif 14 - Nov - 2024 105 Min 42 Sec 75/120

• M

  Muhammad Zain 25 - Apr - 2026 09 Min 22 Sec 72/120

• A

  agha hamza 22 - Nov - 2025 22 Min 17 Sec 72/120

• A

  abdullah masood 04 - Dec - 2024 10 Min 54 Sec 70/120

• M

  Muhammad Awais 01 - Jan - 2025 05 Min 43 Sec 65/120

• A

  Aqsa afridi 02 - Dec - 2024 24 Min 01 Sec 65/120

• S

  shahmeer Ch 17 - Jun - 2026 08 Min 55 Sec 64/120

ECAT Chemistry Chapter 1 Important MCQ's

Sr.#	Question	Answer
1	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
2	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
3	Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is	A. C3H4O3 B. C2H4O3 C. C3H5O4 D. C2H3O1
4	0.5 mole of CH4and 0.5 mole of SO2gases have equal	A. Volume B. Mass in grams C. Total number of atoms D. Number of molecules
5	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
6	A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is	A. 46 B. 78 C. 110 D. 180
7	Relative atomic mass of an element is the mass of the element relative to	A. 1/12 mass of carbon-12 B. 1/12 mass of carbon C. 1 mass of hydrogen atom D. 1/16 mass of oxygen
8	Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same	A. Empirical formula B. Number of atoms in a molecules C. Number of isomers D. Relative molecular mass
9		A. 99.2% B. 99.5% C. 90.5% D. 96.2%
10	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