Advertisements
Advertisements
प्रश्न
Explain,giving one example of the following chemical changes:
Reversible reaction
उत्तर
Reversible reaction
A chemical reaction in which the direction of a chemical change can be reversed by changing the conditions under which the reaction is taking place is called a reversible reaction.
CuSO4.5H2O(s) ⇋ CuSO4(s) + 5H2O(g)
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
\[\ce{Pb(NO3)2->[heat]}\] _________
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Differentiate between in Chemical reaction and chemical equation.
State four conditions necessary for a chemical reaction to take place.
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
Define:
Electrochemical reaction
Give one example
Complete and balance the following reaction:
Pb(NO3)2 + KI →
Distinguish by heating the following in dry test tubs.
Zinc carbonate, Copper carbonate and lead carbonate.
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
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.
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
State the following reaction represent oxidation or reduction.
\[\ce{Fe++->Fe+++}\]
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
Chemists identify gypsum as a natural indicator.
The water we drink is a combination of hydrogen and oxygen.
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Iron benches kept in lawns and gardens get____________. It is a _________ change because a new _________ is formed.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
Write a word equation for the chemical change, if any.
