Advertisements
Advertisements
प्रश्न
Complete and balance the following chemical equations:
Ba`"CI"_2` + `"H"_2"SO"_4` `→`
(aq.) (aq.)
उत्तर
\[\ce{\underset{\text{(aq.)}}{BaCl2} + \underset{\text{(aq.)}}{H2SO4} ->BaSO4 ↓ + 2HCl}\]
APPEARS IN
संबंधित प्रश्न
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Define chemical reaction.
State what you would observe when the following substance is heated in a glass test tube red lead.
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
Explain the following reaction with one suitable example of Decomposition reaction
Name the type of chemical reaction shown by the following equation:
CaCO3 → CaO + CO2
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
Reactants | Products | Type of chemical reaction |
BaCl2(aq) + ZnSO4(aq) | H2CO3(aq) | Displacement |
2AgCl(s) | FeSO4(aq) + Cu(s) | Combination |
CuSO4(aq) + Fe(s) | BaSO4↓ + ZnCl2(aq) | Decomposition |
H2O(l) + CO2(g) | 2Ag(s) + Cl2(g) | Double displacement |
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.
What is a chemical change? Give two examples of chemical change?
State the main characteristics of chemical reactions. Give at least one example in each case.
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
Complete the table given below.
Heat on iodine crystals | Colour of vapours evolved |
Complete the table given below.
Addition of dil. H2SO4 to KHCO3 | Name of residue obtained |
Complete the table given below.
Addition of dil. H2SO4 to zinc | Test for gas evolved |
Match the chemical reactions in List I with the appropriate answer in List II.
List I | List II | ||
1. | \[\ce{XY⇌[heat]X + Y}\] | A: | Displacement reaction |
2. | \[\ce{XY->X + Y}\] | B: | Double decomposition |
3. | \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] | C: | Endothermic reaction |
4. | \[\ce{X + YZ->XZ + Y}\] | D: | Thermal dissociation |
5. | \[\ce{X + Y->[heat]XY -\Delta}\] | E: | Decomposition reaction |
State the following reaction represent oxidation or reduction.
\[\ce{Fe++->Fe+++}\]
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
When lithium metal is placed in hydrochloric acid, _______ gas is evolved.
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
Water boiling into water vapour is an example of chemical change.
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Which of the following is/are true when milk changes into curd?
- Its state is changed from liquid to semi-solid.
- It changes colour.
- It changes the taste.
- The change cannot be reversed.
Choose the correct option from below:
Melting of wax is a change where a solid changes to a liquid state. Give one more such change which you observe in your surroundings
Beating an egg to make a cake is a ______.
Heat may evolve or be absorbed during a ______ change.
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.
The chemical formula of rust is ______.
Both CO2 and H2 gases are ______.