Скачать или смотреть Classs 10 Science activity 1.3 By Sonu Sir

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Activity 1.3
AIM: To obtain Reaction between Hydrochloric acid OR Sulphuric acid solution and zinc Granules.
Material required: (i) Conical flask or test tube (ii) Cork (iii) glass tube (iv)diluted HCl or Diluted H2SO4 (v) pair of tongs
Procedure: Take a few zinc granules in a conical flask or a test tube. Add dilute hydrochloric acid or sulphuric acid to this (CAUTION: Handle the acid with care.
Observations:
1. Observe anything happening around the zinc granules?
Yes Zinc granules are changing into Zincsulphate.
2. Touch the conical flask or test tube anything has taken place?
It feels like it is warm or exothermic reaction has taken place.
3. Is there any change in its temperature?
Yes there is change in temperature, it has been increased.
The following observations help us to determine whether a chemical reaction has taken place –
1. change in physical state
2. change in colour
3. evolution of a gas
4. Change in temperature.

Keep motivated yourself : Sonu Sir