Chemical Calculations [PDF]
Madhyamik Physical Science
Important questions with answers PDF Download available
Select Chapter
- Concern About Our Environment – CLICK HERE
- Behaviour of gases – CLICK HERE
- Chemical calculation – CLICK HERE
- Thermal Expansion- CLICK HERE
- Light – CLICK HERE
- Current Electricity – CLICK HERE
- Atomic Nucleus – CLICK HERE
- Periodic Table – CLICK HERE
- Chemical Bonding – CLICK HERE
- Electrolysis – CLICK HERE
- Inorganic Chemistry – CLICK HERE
- Metallurgy – CLICK HERE
- Organic Chemistry – CLICK HERE
PHYSICAL SCIENCE – FULL COURSE
If you want to prepare yourself for this Madhyamik exam, we strongly recommend you buy our Full Course for WB Madhyamik Physical Science. This course will guide you with all the required materials for your madhyamik preparation. Chapter lecture to guide you about the contents of the syllabus. PDF notes for an easy learning process. Tests and previous year solved. This will complete your Madhyamik Physical science preparation.
Welcome to the blog. Today we will learn some important tips about WB Madhyamik Physical science Chemical calculation. For those who are appearing for the WB Madhyamik Physical Science exam, this blog will be very useful.
In the WB Madhyamik Physical Science Chemical calculation chapter, you will learn different types of
- chemical reactions,
- mole concept,
- stoichiometry,
It is very important to have your basic concept clear to solve the question of WB Madhyamik Physical science Chemical calculation. If the concept is clear, the question can be understood and analyzed easily. The best way to clear concepts is through textbook reading and practice. Textbook read and practice question solve skill improve.
Hard work and smart work and proper dedication and discipline is a requirement for scoring good marks.
Some important questions are listed here to practice. Please go through them. Still more questions are available in our paid version. The PDF links for both are given below.
All the best for your exam.
Important Questions on Madhyamik Physical Science Chapter 3 Chemical calculations
10 Most Important MCQ with answers on Madhyamik Physical Science
1. The relation between matter and energy: E = mc² is called:
(a) Principle of Conservation of Mass)
(b) Principle of Conservation of Energy)
(c) Theory of Relativity)
(d) Theory of Einstein
Ans. (d) Theory of Einstein
2. What is the molar mass of 0.5 moles of oxygen gas?
(a) 32 grams
(b) 16 grams
(c) 3.2 grams
(d) 48 grams
Ans. (b) 16 grams.
3. What is the relationship between the molecular weight and vapor density of a gas?
(a) Molecular mass and vapor density are equal.
(b) The vapor density is twice the molecular weight.
(c) The molecular mass is twice the vapor density.
(d) none of these
Ans. (c) The molecular weight is twice the vapor density.
4. Who propounded the principle of the indestructibility of matter:
(a) Lavoisier
(b) Einstein
(c) Dalton
(d) Rutherford.
Ans. (a) Lavoisier
5. Which scientist propounded the relationship between mass and energy?
(a) Landolt
(c) Einstein
(d) Gay-Lussac
(c) Einstein
Ans: (b) Einstein
6. The formula for the conversion of mass into energy in a chemical reaction is:
(a) E = mc²
(b) E=mc
(c) E = m²c
(d) E² = mc²
Ans: (a) E = mc²
7. How much amount of reactant will get the amount of product; its calculations are done in which –
(a) molecular motion
(b) stoichiometry
(c) Chemistry
(d) Life Sciences
Ans. (b) stoichiometry.
8. The gram molecular mass of H2O is:
(a) 15 grams
(b) 17 grams
(d) 3 grams
(c) 18 grams
Ans. (c) 18 grams
9. The molecular mass of CH4 will be :
(a) 14 grams
(b) 15 grams
(d) 17 grams
(c) 16 grams
Ans. (c) 16 grams
10. Whose weight is more?
(a) one gram atom of nitrogen
(b) one mole of water
(c) one mole of sodium.
(d) one molecule of hydrogen
Ans. (c) one mole of sodium
5 Most Important 1 mark questions with answers on Madhyamik Physical Science
1. What is the gram-molecular mass of nitrogen? (N = 14)
Answer: The gram-molecular mass of nitrogen is 28 grams.
2. What is the mass of 2.24 liters of CO2 at STP? 2
Answer: The mass of 2.24 liters of CO2 at STP is 4.4 grams.
3. What is the number of molecules in 1.8 grams of water?
Answer: The number of molecules in 1.8 grams of water is 6.023 x 10^22.
4. What is the molar volume of the gas at STP?
Answer: The molar volume of a gas at STP is 22.4 liters.
5. The unit of which physical quantity is a mole?
Answer: The unit of measure of substance is the mole.
If you want you can download these question answers in PDF. Click the below link to download.
Want to give a free test? Click below link.
Click the below link to download the full version of this in PDF.