1. Ge
2. Si
3. C
4. Sn

Submitted by :- Muhammad Nawaz

1. 1. As a furniture polish.
   2. As a preservative of eggs
   3. In fire proofing of wood and textiles
   4. All A, B, and C

Submitted by :- Muhammad Nawaz

[A] CaSO₄.7H₂O

[B] SrSO₄.7H₂O

[C] BaSO₄.7H2O

[D] MgSO₄.7H2O

Submitted by :- Muhammad Nawaz

1. 1. Na
   2. H2
   3. Cl2
   4. O2

Submitted by :- Muhammad Nawaz

1. 1. BaSO4
   2. Na
   3. NaOH
   4. NaHCO3

Submitted by :- Muhammad Nawaz

1. 1. SrSO₄
   2. BaSO₄
   3. CaSO₄
   4. BeSO₄

Submitted by :- Muhammad Nawaz

1. Ascorbic acid
2. Haemoglobin
3. Vitamin E
4. Chlorophyll

Submitted by :- Muhammad Nawaz

1. 1. KCI
   2. NaCl
   3. MgCl₂
   4. SrCl₂

Submitted by :- Muhammad Nawaz

1. Ca
2. Mg
3. Ba
4. K

Submitted by :- Muhammad Nawaz

1. 1. Ca
   2. Mg
   3. Ba
   4. K

Submitted by :- Muhammad Nawaz