Advertisements
Advertisements
Question
A chemical equation is a statement that describes a chemical change in terms of
Options
symbols and formulae
energy
number of atoms
colours
Advertisements
Solution
symbols and formulae.
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
What are biocatalysts ?
Define electrolysis.
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.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Give an example of a reaction where the following are involved
Catalyst
Give an example of the following chemical change.
Two gases combine to form white solid
Explain,giving one example of the following chemical changes:
Reversible reaction
What do you understand by 'chemical reaction'?
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.
Lead nitrate
State the original colour of the following substance and colour of residue obtained after heating.
Zinc carbonate
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.
Complete the table given below.
| Heat on ammonium dichromate | Name of neutral gas evolved |
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
The changes in which new substance with new chemical properties are formed are ______.
Which of the following statement is incorrect for a chemical reaction?
Write word equations for two chemical reactions with the help of materials given in the box.
| Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water |
______ is the chemical name of slaked lime.
