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प्रश्न
Select the correct answer for the following options:
The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.
पर्याय
Hydrogen
Copper [II] oxide
Oxygen
Copper [II] hydroxide
Ammonia
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उत्तर
Copper [II] hydroxide
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संबंधित प्रश्न
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
What are homogenous reactions ?
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.
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.
Define the following term:
Precipitate
What do you observe when H2S is passed through a lead nitrate solution.
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Select the correct answer for the following options:
The gas which reacts with oxygen to give a neutral liquid.
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
Higher order Thinking question
A very hot glass on putting in cold water cracks. What does this change indicate?
Chemical change is a temporary change.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
Give two examples for the following case:
Chemical changes
Write the chemical reaction of baking soda with lemon.
Give an example where heat, light, and sound are produced during a chemical change.
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
What is thermochemical reactions?
