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प्रश्न
Give one example of a chemical reaction.
उत्तर
Burning of magnesium ribbon in air to give white powder of magnesium oxide is an example of chemical reaction.
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संबंधित प्रश्न
What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.
Give one example of a chemical reaction characterised by formation of a precipitate.
A white precipitate can be obtained by adding dilute sulphuric acid to:
(a) CuSO4 solution
(b) Nacl solution
(c) BaCl2 solution
(d) Na2SO4 solution
Write word equation for the following skeletal equation:
\[\ce{FeCl2 + Cl2 -> FeCl3}\]
Write word equation for the following skeletal equation:
\[\ce{CO + O2 -> CO2}\]
Why should an equation be balanced? Explain with the help of a simple equation.
Write word equation for the following molecular equation:
\[\ce{N2 + 3H2 ⇌[Fe - 450°C][200 atoms] 2NH3 + \triangle}\]
Word equation:
State why [+ Δ] indication is seen after NH3.
State what 200 atmospheres – indicates.
State the function of Fe in the above reaction.
Give a balanced equation for addition of iron to copper [II] sulphate solution. State the change in colour seen.
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
Fe2O3 + 2H2 → 2Fe + 3H2O
Which of the following are exothermic processes?
- Reaction of water with quick lime
- Dilution of an acid
- Evaporation of water
- Sublimation of camphor (crystals)
