CHSE Odisha Elective Chemistry Practice Questions - Council of Higher Secondary Education, Odisha (CHSE Odisha) Higher Secondary (+2) Elective Chemistry (Science stream) Exam - CHSE Odisha Elective Chemistry Practice Questions - Council of Higher Secondary Education, Odisha (CHSE Odisha) Higher Secondary (+2) Elective Chemistry (Science stream) Exam

Question 1

The number of moles in 36 g of water (H2O; M = 18 g mol^-1) is:

2.0 mol 1.0 mol 0.5 mol 18 mol

Correct Answer:

2.0 mol

Question 2

How many molecules are present in 0.5 mol of CO2? (NA = 6.022 x 10^23 mol^-1)

3.011 x 10^23 6.022 x 10^23 1.204 x 10^24 3.011 x 10^22

Correct Answer:

3.011 x 10^23

Question 3

A sample contains 40% C, 6.7% H and 53.3% O by mass. Its empirical formula is: (C=12, H=1, O=16)

CH2O C2H4O CH2O2 C2H6O

Correct Answer:

CH2O

Question 4

In the reaction 2H2 + O2 → 2H2O, if 4 mol H2 and 1 mol O2 react, the limiting reagent is:

O2 H2 H2O Neither; both are exactly stoichiometric

Correct Answer:

Question 5

Molarity of a solution prepared by dissolving 5.85 g NaCl (M = 58.5 g mol^-1) in water to make 500 mL solution is:

0.20 M 0.10 M 1.0 M 0.50 M

Correct Answer:

0.20 M

Question 1

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Prepare with the CHSE Odisha Elective Chemistry Practice Questions - Council of Higher Secondary Education, Odisha (CHSE Odisha) Higher Secondary (+2) Elective Chemistry (Science stream) Exam practice quiz. This question bank includes 100 questions covering number, solution, enthalpy, pressure, and water. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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CHSE Odisha Elective Chemistry Practice Questions - Council of Higher Secondary Education, Odisha (CHSE Odisha) Higher Secondary (+2) Elective Chemistry (Science stream) Exam

This practice set contains 100 questions from the matching question bank and focuses on number, solution, enthalpy, pressure, and water. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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About this Exam

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CHSE Odisha Elective Chemistry Practice Questions - Council of Higher Secondary Education, Odisha (CHSE Odisha) Higher Secondary (+2) Elective Chemistry (Science stream) Exam

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