On burning, ................ reacts with oxygen to produce metal oxides that are .................. in nature. The information in which row completes the given statement?
Metals, acidic
Non-metals, acidic
Metals, basic
Non-metals, basic
A silvery liquid element 'X' is a good conductor of heat and electricity at room temperature. The element 'X' is-
Aluminium
Magnesium
Mercury
Lead
An element 'X' is light, resists corrosion and is a good conductor of heat and electricity. It can be used to make alloys that are light and strong. The element 'X' is
Copper
Zinc
Iron
The characteristic properties of non-metals are:
I. Formation of acidic oxides
II. High density
III. Tendency to form anions
I and II only
I and III only
II and III only
All of the above
What is the chemical formula of sulphurous acid?
H2SO4
SO2
SO3
H2SO3
Most metals can be drawn into thin unbroken wires. This property is called
Allotropy
Conductivity
Ductility
Malleability
Stainless steel (an alloy containing iron, chromium and nickel) does not rust because
Iron form a hard chemical with chromium
Chromium form a coating of oxide that protects iron
Nickel does not rust
None of these
Which of the following will displace copper from a solution of copper (II) sulphate?
I. Zn
II. Fe
III. Ag
IV. Mg
I, II and III only
I, II and IV only
Aluminium metal is not acted upon by pure water as:
It is a light metal.
It is not a reactive metal.
It is protected by a film of aluminium oxide.
Impurities in water are essential for reaction to occur.
Which two of these elements are metals?
I. Iodine
II. Aluminium
III. Zinc
IV. Carbon
I and II
II and III
III and IV
IV and I
