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प्रश्न
Complete and balance the following chemical equations:
N2 + O2 →
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उत्तर
N2 + O2 → 2NO(g)
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संबंधित प्रश्न
Write the missing reactants and products and balance the equations.
\[\ce{KClO3 ->[heat]}\] ___________+ ____________
MATCH THE COLUMNS
| 1 . `H_2` + `CI_2` `→` 2HCI | a. displacement reaction |
| 2. `2FeCI_3`+ `H_2` `→` `2FeCI_2` +2HCI` | b. addition of an electronegative redical |
| 3. Fe + `CuSO_4` `→``FeSO_4` +Cu` | c. removal of an electronegative redical |
| 4. `2H_2O` +`4NO_2`+`O_2` `→` `4HNO_3` | d.reduction by adding hydrogen |
| 5. 3Fe +`3CI_2` `→` `2FeCI_3` | e.electrolysis of water |
| 6. `FeCI_3`+ 3NaOH `→``Fe(OH)_3``↓`+NaCI | F.double decomposition,precipitation reaction |
| 7.`2H_2O` `→` `2H_2``↑`+`O_2` | e. combination or synthesis reaction |
TRUE \ FALSE
Ammonia is a good oxidizing agent.
How is a strong electrolyte different from a weak electrolyte?
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
State what you would observe when the following substance is heated in a glass test tube red lead.
Explain the following reaction with one suitable example of Decomposition reaction
Explain the following reaction with one suitable example of Displacement reaction.
Name the type of chemical reaction shown by the following equation:
CaCO3 → CaO + CO2
Out of sodium and sulphur which is a metal? Explain its reaction with the oxygen.
Name affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of dilute acid to an active metal.
Complete the table given below.
| Addition of dil. H2SO4 to KHCO3 | Name of residue obtained |
Complete the statement by filling in the blank with the correct word:
The reddish-brown precipitate obtained during a double decomposition precipitation reaction between an iron salt and alkali is __________.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Ammonium dichromate.
Limestone contains ______ mainly.
Mention the various conditions required for a chemical reaction to occur.
Arrange the following statements in correct sequence:
- One side is water-loving and other water-hating molecules.
- When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
- The dirt surrounded by the detergent molecules floats in the water making it dirty.
- Finally, the cloth is clean.
- The detergent molecules have two sides.
- Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think formation of rust from iron is a chemical change?
Write the chemical reaction of baking soda with lemon.
