Choose the appropriate option and rewrite the following statement.
valency of carbon is 4 and that of oxygen is 2. From this, we understand that there are _______ chemical bond/bonds between the carbon atom and one oxygen atom in the compound-carbon dioxide.
Write the names and symbols of the constituent elements and identify their valencies from the molecular formulae given below.
KCl, HBr, MgBr2, K2O, NaH, CaCl2, CCl4, HI, H2S, Na2S, FeS, BaCl2
Chemical composition of some matter is given in the following table. Identify the main type of matter from their.
|Name of matter||Chemical composition||Main type of matter|
|Sea water||H2O + NaCl + MgCl2|
|Hydrogen gas filled in a ballon||H2|
|The gas in LPG cylinder||C4H10 + C3H8|
|The gas in oxygen cylinder||O2|
|Bronze||Cu + Sn|
|Heated white powder of blue vitroi||CuSO4|
|Dilute hydrochloric acid||HCL+ H2O|
Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method.
C (Valency 4) & Cl (Valency 1)