General
✓✗The metal which is hard and corrosion resistant is
- nickel
- iron
- platinum
- tungsten
General
✓✗Which of the following can be used as reducing agents in extraction of metals ?
- carbon and aluminium
- sodium
- calcium
- all
General
✓✗Non-metal which is a good conductor of electricity
- Sulphur
- Oxygen
- Graphite
- Phosphorus
General
✓✗Copper can be extracted from
- Cuprite
- Cinnabar
- Calamine
- Pyrolusite
General
✓✗Thermite is a mixture of
-
and aluminium powder
-
Mg and
-
and iron
- none of the above
General
✓✗Which of the following metal exists in the liquid state?
- Na
- Ag
- Cr
- Hg
General
✓✗A common metal which is highly resistant to corrosion is
- iron
- copper
- aluminium
- magnesium
General
✓✗An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be
- sulphur
- carbon
- calcium
- hydrogen
General
✓✗Atomic number of an element ‘Y’ is 16, which type of ion will it form?
General
✓✗Highly reactive metals are extracted by
- calcination
- roasting
- electrolysis
- chlorination