IIT FOUNDATION
Test – 3 (VII Std)
Name-_______________________________ Marks: 25m

1) What is a symbol?



2) What do you understand by the term chemical formula ?



3) State the valency and formula of the following radicals or ions :
(i) Ammonium (ii) Calcium

(iii) Barium (iv) Oxide

4) Write the formulae of the following salts :
(i) Ammonium sulphate (ii) Potassium dichromate



(iii) Silver chloride (iv) Sodium nitrate



5) Write the names of the following compound?
(i) Al2(SO4)3 (ii) KMnO4

(iii) CuSO4 (iv) KClO3
6) Give the names of the following :
(i) KOH (ii) HNO3
(iii) HCL (iv) Ca(OH)2
7) MNO3 is the formula of nitrate of a metal M. write down the formulae of
(i) Chloride of M (ii) Hydride of M



8) Molecular weight and empirical of the compounds are 13 and CH. What is its molecular formula?




9) Write the molecular weight of
(i) Sodium Hydroxide (ii) Calcium carbonate (iii) Hydrochloric acid