In the following four test tubes, some metals are in contact with certain salt solutions . After the experiment, in which test tubes does the solution become colourless and powdery red mass is deposited at the bottom of the test tube. Test tube Test tube Test tube Test tube (A) (B) (C) (D)
Answers
Answer:
Heii
A. Is your correct ans
Answer:
Test tube (C)
Explanation:
In test tube (C), the blue solution of CuSO4 becomes colourless. Zn will displace Cu from CuSO4 solution. Cu will be deposited as red powder and a colourless solution of ZnSO4 is obtained.
Zn + CuSO4 --------> ZnSO4 + Cu (Red)
(Blue) (Colourless)
Metals
Metals are materials that are hard, lustrous, malleable, ductile, sonorous and good conductors of heat and electricity. Examples of metals are iron, copper, aluminium, calcium, magnesium, etc.
Salt Solution
A balanced salt solution is a solution made to a physiological pH and isotonic salt concentration. Solutions most commonly include sodium, potassium, calcium, magnesium, and chloride.
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