Advertisements
Advertisements
Question
Give an example of the following chemical change.
A reaction where colour change is noticed
Advertisements
Solution
\[\ce{Fe + \underset{\text{Blue solution}}{CuSO4_(_a_q_)} ->\underset{\text{Green solution}}{FeSO4} + Cu}\]
APPEARS IN
RELATED QUESTIONS
Name three biochemical catalysts found in the human body.
Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.
\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]
What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.
Define an electrochemical reaction.
Name affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.
Give a chemical test to distinguish between the following gases.
NH3 and SO2
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Chemists identify gypsum as a natural indicator.
Match the following:
| Column I | Column II | ||
| 1. | Burning of coal | a. | Rusting |
| 2. | Painting of a surface | b. | Evaporation |
| 3. | Dipping iron in the water | c. | Chemical change |
| 4. | Salt from seawater | d. | Prevention of rusting |
______ is the chemical name of rust.
