Advertisements
Advertisements
प्रश्न
Fill in the blank:
During a chemical reaction transfer of ________ takes place.
Advertisements
उत्तर
During a chemical reaction transfer of energy takes place.
APPEARS IN
संबंधित प्रश्न
How do the following help in bringing about a chemical change?
heat.
Fill in the blank.
Melting of ice is a _______ change.
Balance the following equation :
Fe + H2O → Fe3O4 + H2
Explain the following reaction with one suitable example of Double decomposition reaction.
Name the type of chemical reaction shown by the following equation :
Fe2O3 + 2Al → Al2O3 + 2Fe
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)
The spoiling of food is a chemical change which is recognized from the generation of certain ______ due to it.
Define the following term:
Precipitate
Write the chemical reaction where the following changes are observed.
Gas is evolved
Give reason for the following:
Silver nitrate solution is kept in coloured bottles.
What do you observe when HCI is passed through a silver nitrate solution.
Name the following:
The products obtained during ‘photosynthesis’ – which is a chemical change.
Complete the table given below.
| Addition of dil. H2SO4 to zinc | Test for gas evolved |
Explain the term chemical reaction with special reference to reactants and products.
Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to calcium carbonate.
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Water boiling into water vapour is an example of chemical change.
What is the use of indicator?
Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
