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A student noted down the following …

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A student noted down the following precaution for the experiment “To verify the law of conservation of mass in a chemical reaction.” (i) The spring balance should be held vertical while in use. (ii) Before marking use of the spring balance it must be ensured that its pointer is at zero mark. (iii) The reading of the balance should be noted only when its pointer comes to rest. (iv) Mixing of two solutions should be done quickly. (v) Chemical reaction should be exothermic. The precautions which need modifications are: (a) (i) and (iii)

Posted by Jo Tesh 4 years, 7 months ago

CBSE > Class 09 > Science

0 answers

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