Advertisements
Advertisements
प्रश्न
Out of sodium and sulphur which is a metal? Explain its reaction with the oxygen.
Advertisements
उत्तर
Out of sodium and sulphur, sodium is a metal. so sodium reacts with oxygen to form sodium oxide.
\[\ce{\underset{Sodium}{4Na(s)} + \underset{Oxygen}{O2(g)} -> \underset{Sodium oxide}{2Na2O(s)}}\]
APPEARS IN
संबंधित प्रश्न
What do you observe when iron nail is kept in copper sulphate solution for sometime.
FILL IN THE BLANK
On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Write a short note on the information derived from a balanced chemical equation.
What do you observe when :
an iron nail is kept in tap water for few days
Write true or false :
When potassium iodide solution is added to lead acetate solution a red precipitate is formed.
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
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)
Oxygen is a ______ in respiration.
Explain the term reactant and product giving examples.
Give an example of the following chemical change.
Two gases combine to form white solid
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
Circle the odd one out. Give reason for your choice
The chemical change is ______.
Chemists identify gypsum as a natural indicator.
Give an example of a chemical reaction for the following situation:
A change in colour is observed
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.
Are these changes chemical in nature?
Write a note on the following:
Curdling of milk
______ is a chemical substance is used in whitewashing.
