Chemistry/Inorganic
The most abundant element in Earth’s crust is:- A.iron
- B.silicon
- C.oxygen
- D.aluminium
Sciences
Chemistry
Physical, organic and inorganic chemistry.
Chemistry/Organic
The functional group in alcohols is:- A.–COOH
- B.–CHO
- C.–OH
- D.–NH2
Chemistry/Physical
The pH of a neutral solution at 25°C is:- A.0
- B.7
- C.14
- D.1