Question

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Answer 1

9-since HCL is an acid the student will observe that the universal indicator will turn red

10-1-during rainy season the surrounding become humid and when this water come in contact with the salt,

salt becomes sticky

2-blue vitriol that is copper sulphate which seem to be of blue colour when heated the water is removed and the salt turns white

3-since it is hygroscopic to absorb the air particles it comes out and its concentration is decreased

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