True or false. (If false give the correct statement) 1. Alkali metals

1.	True or false. (If false give the correct statement) 1. Alkali metals are generally extracted by the electrolysis of their ores in fused state. 2. Every mineral is an ore but every ore is not a mineral. 3. Slag is a product formed during smelting by combination of flux and impurities. 4. Reactive metals occur in native state. 5. Malachite is a sulphide ore of copper. 6. Lanthanides are present in the 6th group of the periodic table. 7. Atomic radius increases as we go across the period due to increase in size.8. As the positive charge increases, the size of the cation decreases. 9. If the difference in electronegativity is greater than 1.7, the bond is considered to be covalent. 10. Siderite is the carbonate ore of calcium.
Answer» 1.True 2. True 3. True 4. False – Reactive metals always occur in the combined state. 5. False – Malachite is the carbonate ore of copper. 6. False – Lanthanides are present in the 6th period of the periodic table. 7. False – Atomic radius increases as we go across the period due to decrease in size. 8. True 9. False – If the difference in electronegativity is greater than 1.7, the bond is considered to be ionic. 10. False – Siderite is the carbonate ore of Iron.

True or false. (If false give the correct statement) 1. Alkali metals are generally extracted by the electrolysis of their ores in fused state. 2. Every mineral is an ore but every ore is not a mineral. 3. Slag is a product formed during smelting by combination of flux and impurities. 4. Reactive metals occur in native state. 5. Malachite is a sulphide ore of copper. 6. Lanthanides are present in the 6th group of the periodic table. 7. Atomic radius increases as we go across the period due to increase in size.8. As the positive charge increases, the size of the cation decreases. 9. If the difference in electronegativity is greater than 1.7, the bond is considered to be covalent. 10. Siderite is the carbonate ore of calcium.

Answer»

1.True

2. True

3. True

4. False – Reactive metals always occur in the combined state.

5. False – Malachite is the carbonate ore of copper.

6. False – Lanthanides are present in the 6th period of the periodic table.

7. False – Atomic radius increases as we go across the period due to decrease in size.

8. True

9. False – If the difference in electronegativity is greater than 1.7, the bond is considered to be ionic.

10. False – Siderite is the carbonate ore of Iron.