Advertisements
Advertisements
Question
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)
A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.
Advertisements
Solution
A colourless solution of calcium hydroxide in a test tube turns milky on blowing in it through a blow tube for some time.
RELATED QUESTIONS
Complete and balance the following chemical equation:
\[\ce{Pb(NO3)2 ->[Heat]}\]
TRUE \ FALSE
Ammonia is a good oxidizing agent.
Fill in the blank:
The substances which undergo chemical change are called _______
Copper carbonate when heated, it turns :
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| d. | Dissolution of salt in water | iv. | Covalent bond |
| e. | Carbon | v. | Ionic bond |
| f. | Fluorine | vi. | Physical change |
| g. | Magnesium | vii. | Tendency to form anion |
What is a chemical reaction?
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Classify the following processes into physical or chemical changes:
- Beating of aluminium metal to make aluminium foil.
- Digestion of food.
- Cutting of a log of wood into pieces.
- Burning of crackers.
Give two examples for the following case:
Chemical changes
