Advertisements
Advertisements
प्रश्न
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
पर्याय
Process − A is a chemical change
Process − B is a chemical change.
Both processes A and B are chemical changes.
None of these processes is a chemical change
Advertisements
उत्तर
Process − B is a chemical change.
APPEARS IN
संबंधित प्रश्न
Give reason.
Acidic soil is treated with quick lime.
Complete the statement by filling the gaps using 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)
The white particles of baking soda disappear when put in lemon juice. This means that it is a ______ change.
Give a word equation for the following reaction.
An exothermic reaction where both the reactants are gases, one of which is oxygen.
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
Mention the various conditions required for a chemical reaction to occur.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Write a word equation for the chemical change, if any.
Iron and rust are the same substances.
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 |
