Gold is used in _________________.
Thermometer
Fuel
Jewellery
Machinery
Metals react with oxygen to form ___________.
Acidic oxides
Basic oxides
Either acidic or basic oxides on depending on the metal.
There is no reaction
All types of steel essentially contain
Iron and manganese
Iron and carbon
Manganese and chromium
Carbon and manganese
The given table represents the use of non-metal.
The information in which row completes the given table?
i- Carbon; ii- freezing food; iii- sulphur
i- Sulphur; ii- kitchen foil; iii- zinc
i- Carbon; ii- kitchen foil; iii- zinc
i- Sulphur; ii- freezing food; iii- carbon
Which one is the best conductor of electricity?
Ni
Ag
Au
Na
Aluminium foil used for wrapping ____________.
Food
Clothes
Plastic
Wires
Which one of the following metal is always stored under kerosene?
Sodium
Aluminium
Magnesium
Copper
4 P + 502 ----------> _________.
Phosphorous Oxygen
P3O5
2P2
2P2O5
P2O5
Which of these are defined as elements which form negative ions by gaining electrons?
Metals
Metalloids
Non-metals
Noble metals.
What is the chemical formula of sulphurous acid?
H2SO4
SO2
SO3
H2SO3
