Advertisements
Advertisements
Question
Write the chemical reaction where the following changes are observed.
Gas is evolved
Advertisements
Solution
\[\ce{Zn + H2SO4 -> ZnSO4 + H2}\]
APPEARS IN
RELATED QUESTIONS
How would you show that setting of curd is a chemical change?
Complete the statement by filling the gap using an appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
Water boiling into water vapour is an example of chemical change.
The water we drink is a combination of hydrogen and oxygen.
Match the following:
| 1. | Sodium Chloride | a. | CaSO41/2H2O |
| 2. | Calcium sulphate dihydrate | b. | C2H5Oh |
| 3. | Magnesium sulphate hydrate | c. | CaSO4.2H2O |
| 4. | Calcium sulphate hemihydrate | d. | NaCl |
| 5. | Phenol | e. | MgSO4.H2O |
Classify the following as physical or chemical properties
Most metal oxides form alkalis on interacting with water.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think formation of rust from iron is a chemical change?
Write a note on the catalyst.
