Advertisements
Advertisements
प्रश्न
Define precipitation reaction.
Advertisements
उत्तर
A chemical reaction in which two compounds in their aqueous state react to form an insoluble salt as one of the products.
APPEARS IN
संबंधित प्रश्न
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.
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
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)
Oxygen is a ______ in respiration.
Explain by writing a word equation.
Limestone powder disappears on adding to dilute hydrochloric acids.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
The conversion of ferrous sulphate to ferric sulphate is ______ reaction.
Give an example of the following chemical change.
Two solids combine to form a liquid
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
What is a chemical reaction?
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Define the following term:
Chemical change
