Advertisements
Advertisements
Question
Name the type of chemical reaction shown by the following equation:
CaCO3 → CaO + CO2
Advertisements
Solution
CaCO3 → CaO + CO2 => Decomposition reaction
APPEARS IN
RELATED QUESTIONS
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron and rust are the same substances.
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
Complete and balance the following chemical equation:
\[\ce{Pb(NO3)2 ->[Heat]}\]
Define precipitation reaction.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer
Which of the following is a reducing agent?
- oxygen
- chlorine
- hydrogen
- none of these
Fill in the blank:
The substances formed as a result of a chemical reaction are called _______
When electric current is passed through acidulated water ______ of water takes place.
Multiple choice:
A reaction of a type: AB + CD → AD + CD, involves
Give one example electrochemical reaction.
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
What is a chemical reaction?
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white solid which evolves two colourless gases which on cooling combine and condense on the cooler parts of the test tube.
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Can you change rust back into iron by some simple method?
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 |
Write the equation for the process of formation of rust.
Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.
