Advertisements
Advertisements
प्रश्न
Complete the statement by filling the gap using an 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.
Advertisements
उत्तर
An arrow is drawn in between the reactants and products while writing the equation for a chemical reaction.
संबंधित प्रश्न
How would you show that setting of curd is a chemical change?
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
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 |
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
What happens when cane sugar is strongly heated? Mention any two changes in it.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
Write the characteristics of chemical change.
Why is spoiling food a chemical change?
