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Published on: 25/05/2021
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Download CBSE Class 12th Standard CBSE Chemistry question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 12th Standard CBSE Chemistry
Questions + Answers key
Take MCQ Chemistry Test
1.
Give one most important application of the phenomenon of depression in freezing point in everyday life.
2.
Define molal depression constant/cryoscopic constant.
3.
Define molal elevation constant, Kb or ebullioscopic constant.
4.
What happens when blood cells are placed in pure water ?
5.
Why does water from the soil rise to the top of a tall tree ?
1.
In lowering the freezing point of water in the car radiator by adding suitable solutes (ethylene glycol) to run it in sub - zero weather.
2.
The depression in freezing point that takes place when the molarity of the solution is unity.
3.
It is equal to elevation in boiling point that takes place when molality of the solution is unity.
4.
Due to osmosis, water molecules move into blood cells through the cell walls. As a result, blood cells swell and may even burst.
5.
Due to osmosis through the roots because root cell walls are made up of semipermeable membrane.
12th Standard CBSE Syllabus & Materials
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