Advertisements
Advertisements
प्रश्न
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
पर्याय
oxidation
reduction
उत्तर
oxidation
\[\ce{H->H+}\]
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Formation of manure from leaves is a physical change.
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
Explain the type of reactions on the basis of the direction of reaction.
A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.
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)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
Explain by writing a word equation.
Hard water gets softened on mixing with a solution of washing soda.
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
Complete the following table and write your observations.
Hydrogen sulphide |
Ammonia |
Sulphur dioxide |
Hydrogen chloride |
|
Shake the gas with red litmus solution |
||||
Shake the gas with blue litmus solution |
||||
Apply a burning splint to a gas |
State the original colour of the following substance and colour of residue obtained after heating.
Ammonium dichromate
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
Complete the table given below.
Heat on iodine crystals | Colour of vapours evolved |
Complete the table given below.
Heat on copper carbonate | Test for gas evolved |
Give a suitable example with an equation to show the representation of a chemical reaction.
Rusting of Iron: undesirable change:: Dead plants turn into manure: ______.
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.
Beating an egg to make a cake is a ______.
Iron and rust are the same substances.
Chemical changes are important in our day-to-day life. Give examples.
Write a note on the following:
Curdling of milk