Advertisements
Advertisements
प्रश्न
A student prepared an aqueous solution of CuSO4 in beaker X and an aqueous solution of FeSO4 in beaker Y. He then dropped some iron pieces in beaker X and some zinc pieces in beaker Y. After about 10 hours he observed that the solutions in X and Y respectively appear:
(A) blue and green
(B) colourless and pale green
(C) colourless and light blue
(D) greenish and colourless
उत्तर
Reaction in beaker X: Fe + CuSO4 (blue) -> FeSO4 (green) + Cu Reaction in beaker Y: Zn + FeSO4 (green) -> ZnSO4 (colourless) +Fe
The Correct Answer is D
संबंधित प्रश्न
When crystals of copper sulphate are strongly heated, the residue obtained is ___________.
(A) red in colour
(B) blue in colour
(C) green in colour
(D) colourless
Find the odd man out:
Camphor, Ammonium Chloride, Naphthalene balls, Sugar
One of the following is an endothermic reaction. This is:
(a) combination of carbon and oxygen to form carbon monoxide
(b) combination of nitrogen and oxygen to form nitrogen monoxide
(c) combination of glucose and oxygen to form carbon dioxide and water
(d) combination of zinc and hydrochloric acid to form zinc chloride and hydrogen
Gas A, which is the major cause of global warming, combines with hydrogen oxide B in nature in the presence of an environmental factor C and a green material D to form a six carbon organic compounds E and a gas F. The gas F is necessary for breathing.
(a) What is gas A?
(b) What is the common name of B?
(c) What do you think could be C?
(d) What is material D? Where is it found?
(e) Name the organic compound E.
(f) What is gas F? Name the natural process during which it is released.
What type of reaction is represented by the following equation?
CaO + H2O → Ca(OH)
What type of reaction is represented by the following equation?
CaO + CO2 → CaCO3
Give one example of a combination reaction which is also exothermic.
Give a balanced equation for –
A direct combination reaction involving two elements, one of which is a non-metal
Complete the statement by filling in the blank with the correct word:
Direct combination reaction of phosphorus pentoxide with water gives _______.
- Assertion: Rusting of Iron is endothermic in nature.
- Reason: As the reaction is slow, the release of heat is barely evident.
