General
✓✗Alkali metals cannot be prepared by the reduction of their oxides. Why?
- The alkali metals are the strongest reducing agents
- The alkali metals are large in size
- The alkali metals have high electronegativity
- The alkali metals have only one valence electron
General
✓✗Non-metal chlorides are
- ionic compound
- covalent compound
- Both ‘a’ and ‘b’
- None of these
General
✓✗An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is
- calcium
- carbon
- silicon
- iron
General
✓✗Atomic number of an element ‘Y’ is 16, which type of ion will it form?
General
✓✗The atomic number of an element Y is 17. The number of electrons in its ion 
will be
will be- 17
- 18
- 19
- 20
General
✓✗An alloy in which one metal is Mercury is known as
- Solder
- Bronze
- Brass
- Amalgam
General
✓✗Most abundant non-metal is
- O2
- H2
- N2
- O3
General
✓✗Hematite is
-
-
-
- HgS
General
✓✗Roasting is used for converting_____ ones in to metal oxides
- carbonate ores
- oxide ores
- sulphide ores
- phosphate ores
General
✓✗Stainless steel is an alloy of Iron with
- Carbon
- Chromium and Nickel
- Lead and Tin
- Copper