Advertisements
Advertisements
प्रश्न
Give a suitable example with an equation to show the representation of a chemical reaction.
उत्तर
Iron and sulphuric acid dilute which reacts to produce ferrous sulphate and hydrogen gas can be represented by a chemical equation.
\[\ce{Iron + dil.sulphuric acid->ferruous sulphate and hydrogen}\]
\[\ce{\underset{\text{reactants}}{Fe + dil.H2SO4}->\underset{\text{Products}}{FeSO4 + H2}}\]
APPEARS IN
संबंधित प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
Define catalyst.
Is kerosene an electrolyte or a non-electrolyte ?
How is a strong electrolyte different from a weak electrolyte?
True or false
New substances are formed in a chemical change.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Define Photochemical reaction
Give an example
Write the chemical reaction where the following changes are observed.
Precipitate is formed
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
State the type of reactions for the following represent and balance the ones that are not balanced.
NaOH + HCl → NaCl + H2O
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Define:
Electrochemical reaction
Give one example
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium dichromate.
Give balanced equation for the following conversion affected by heat alone on the substance:
Hydrated copper sulphate to sulphur dioxide
Limestone contains ______ mainly.
Which is used as a catalyst during the process of hydrogenation of oils?
Write five changes in the characteristics of a substance that can take place during a chemical change.
______ is a chemical substance is used in whitewashing.
What are the chemical reactions that occur in everyday life?