Advertisements
Advertisements
प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron pipes coated with zinc do not get rusted easily.
विकल्प
True
False
Advertisements
उत्तर
This statement is True.
Explanation:
The zinc coating on iron pipes prevents rust by acting as a protective barrier.
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Formation of manure from leaves is a physical change.
FILL IN THE BLANK
A .............. change is a temporary change.
TRUE \ FALSE
Positively charged electrode is called the anode. True or false ?
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Explain,giving one example of the following chemical changes:
Reversible reaction
What do you observe when CO2 is passed through lime water first and then a little in excess.
Give a word equation for the following reaction.
An exothermic reaction where both the reactants are gases, one of which is oxygen.
Match the chemical reactions in List I with the appropriate answer in List II.
| List I | List II | ||
| 1. | \[\ce{XY⇌[heat]X + Y}\] | A: | Displacement reaction |
| 2. | \[\ce{XY->X + Y}\] | B: | Double decomposition |
| 3. | \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] | C: | Endothermic reaction |
| 4. | \[\ce{X + YZ->XZ + Y}\] | D: | Thermal dissociation |
| 5. | \[\ce{X + Y->[heat]XY -\Delta}\] | E: | Decomposition reaction |
Why is spoiling food a chemical change?
