NA
Amit Rastogi Science Solutions for Exercise - NA
Simple step-by-step solutions to NA questions of Physical and Chemical Changes from ThinkTrail CURIOSITY CHRONICLES A Coursebook For Science Grade 7. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from NA with Hints & Solutions
What are crystals? How can the crystals of copper sulphate be prepared from its impure sample?
Describe as clearly as possible, how will you obtain pure crystals of copper sulphate from the impure copper sulphate.
Reena was trying to make crystals of salt and sugar in separate containers. Which one of them will form crystals faster? Why do you think so?
Define: Crystallization
Explain how you will make crystals of sugar from sugar solution.
Why is crystallisation considered a much better technique than evaporation to separate a solid from its solution?
Explain how the crystals of copper sulphate are prepared. Why is sulphuric acid added to the solution?
What is crystallisation and in what way is this process useful to us?
