Advertisements
Advertisements
प्रश्न
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
Advertisements
उत्तर
`"Na"_2"SO"_3` + 2HCI `→` 2NaCI + `"H"_2"O"` +`"SO"_2`
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Formation of manure from leaves is a physical change.
Complete and balance the following chemical equation:
\[\ce{Pb(NO3)2 ->[Heat]}\]
Define precipitation reaction.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
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 |
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Hydrogen chloride
Explain the term reactant and product giving examples.
What is a chemical reaction?
What do you observe? When
Barium chloride is added to sodium sulphate solution
Give an example of the following chemical changes.
A reaction involving
(i) Change of state
(ii) formation of precipitate
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium dichromate.
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
State the following reaction represent oxidation or reduction.
\[\ce{Fe++->Fe+++}\]
The chemical change is ______.
Galvanization is a process in which ______ is coated as a layer of iron.
Write the equation for the process of formation of rust.
