Advertisements
Advertisements
प्रश्न
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaCO3
Advertisements
उत्तर
NaCO3
Correct formula – Na2CO3
APPEARS IN
संबंधित प्रश्न
Give the formula and valency of:
aluminium ………………. .
Complete the following statement by selecting the correct option :
The correct formula of aluminium oxide is
Match the following:
| Column A | Column B |
| (a) Pb(NO3)2 | (i) rotten eggs smell |
| (b) CO2 | (ii) burns with a pop sound |
| (c) (NH4)2Cr2O7 | (iii) the suffocating smell of sulphur |
| (d) HCI | (iv) lime water turns milky |
| (e) NO2 | (v) crackling sound |
| (f) O2 | (vi) residue swells up |
| (g) H2 | (vii) brown gas |
| (i) H2S | (viii) supports combustion |
| (j) SO2 | (ix) fumes with NH3 solution |
The formula of the nitride of a metal X is XN, state the formula of :
- its sulphate
- its hydroxide.
Name the element in the compound and give the formula of the following compound:
Carbonic acid
Write the formula of the following compound:
Sodium bisulphite
Write the formula of the following compound:
Zinc oxide
Write the formula of the following compound:
Copper [II] chloride
Write the formula of the following compound:
Copper [I] sulphide
Write the formula of the following compound:
Copper [II] nitrate
Write the formula of the following compound:
Copper [II] sulphate
Write the formula of the following compound:
Iron [III] chloride
Write the formula of the following compound:
Iron [III] sulphide
Write the formula of the following compound:
Lead [II] sulphate
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
KCr2O7
What is a chemical formula?
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
