Question
What gas is released when zinc reacts with dilute
hydrochloric acid?Solution
The chemical reaction between zinc and dilute hydrochloric acid produces zinc chloride and hydrogen gas:
`Zn + 2HCl → ZnCl₂ + H₂↑`
The hydrogen gas released is colorless, odorless, and flammable.
- If p = 28 - q - r and pq + r(p + q) = 231, then find the value of (p² + q² + r²).
((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?
...If (a – 8) 2  + (b + 2) 2 + (c – 3) 2  = 0, then find the value √(a +b + c).
...- If (x - y) = 5, then find the value of (x³ - y³ - 15xy).
A man covered 40 km by bus and rest 25 km on foot. If the speed of the bus is 150% more than that of the man and the whole distance is covered in 2 hour...
If a + b + c + d = 4, then the value of Â
If the ratio of the areas of two triangles is 4:3 and the ratio of their heights is 3:4, then the ratio of the lengths of their bases will be
  = ?`sqrt(sqrt(56-sqrt(56-sqrt(56)) ... prop)` = ?
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