Advertisements
Advertisements
प्रश्न
The removal of oxygen from a substance is called:
(a) oxidation
(b) corrosion
(c) reduction
(d) rancidity
उत्तर
(c) reduction
The removal of oxygen from the substance is called reduction.
Example: ZnO + C → Zn + CO
In this reaction, zinc loses oxygen and hence gets reduced. On the other hand, carbon gains oxygen and gets oxidised.
APPEARS IN
संबंधित प्रश्न
Translate the following statement into chemical equation and then balance it.
Hydrogen gas combines with nitrogen to form ammonia
Fill in the following blank with suitable word:
A solution made in water is known as an ........... solution and indicated by the symbol ...........
What happens when silver nitrate solution is added to sodium chloride solution?
Write the equation for the reaction which takes place.
Write your observations and name the product when
Iron nails are added to an aqueous solution of copper sulphate.
Choose the correct alternative and rewrite the following sentence.
Which of the following is not required to find the pH of a given solution?
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Electrical energy
Write word equation for the following chemical reaction given below. Also state the observation seen in the case.
\[\ce{Na2SO3 + 2HCl ->[\triangle] 2NaCl + H2O + SO2}\]
Give an example of a chemical equation in which two reactants form:
two product
Balance the following simple equation:
Fe + H2O ⇌ Fe3O4 + H2
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Molecules: 6.02 × 1023 + ______ `→` ______ + ______
