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
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Condensation of steam is not a chemical change.
Complete and balance the following chemical equations:
Zn + `"H"_2"SO"_4` `→`
(dil)
Differentiate between in Chemical reaction and chemical equation.
Write true or false :
No new substance is formed during a chemical reaction.
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
Name the type of chemical reaction shown by the following equation:
NaOH + HCl → NaCl + H2O
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)
Chlorine (Cl2) molecule is formed by ______ of electrons between two chlorine atoms.
Define the following term:
Precipitate
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
Name the gases which turn moist red litmus blue.
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Give a word equation for the following reaction.
A compound which on heating shows – colour change from brown to yellow.
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Lead nitrate.
______ change results in the change of the substance.
______ is a natural indicator.
Iron and rust are the same substances.
Write a note on the following:
Curdling of milk
