Give the correct order of initials T or F for following statements. Use T if statement is true and F if it is false.
(i) Every mineral is an ore but every ore is not a mineral
(ii) Slag is product formed during extraction of metal by combination of flux and impuritites.
(iii) Highly pure metals can be obtained by zone refining.
(iv) Carnallite is an ore of magnesium and sodium.

Options

A. T T T F
B. FT TF
C. FT T T
D. TFTF

Answer

To determine the truth value of each statement, we will analyze them one by one.

### Step-by-Step Solution:

1. **Statement (i)**: "Every mineral is an ore but every ore is not a mineral."
- **Analysis**: This statement is false. While all ores are minerals (specifically, those minerals from which metals can be extracted), not all minerals can be classified as ores. For example, bauxite is an ore of aluminum, but not all minerals can be used to extract metals.
- **Conclusion**: F

2. **Statement (ii)**: "Slag is a product formed during extraction of metal by combination of flux and impurities."
- **Analysis**: This statement is true. Slag is indeed formed during the extraction of metals, particularly in processes like smelting, where a flux is added to combine with impurities, resulting in the formation of slag.
- **Conclusion**: T

3. **Statement (iii)**: "Highly pure metals can be obtained by zone refining."
- **Analysis**: This statement is true. Zone refining is a technique used to purify metals and semiconductors, allowing for the production of highly pure materials. It is commonly used for elements like germanium, silicon, and gallium.
- **Conclusion**: T

4. **Statement (iv)**: "Carnallite is an ore of magnesium and sodium."
- **Analysis**: This statement is false. Carnallite is primarily an ore of potassium (K) and magnesium (Mg), not sodium (Na).
- **Conclusion**: F

### Final Order of Initials:
- (i) F
- (ii) T
- (iii) T
- (iv) F

Thus, the correct order is: **F, T, T, F**.