Which of these metals is found in the alloys of brass and bronze?
Copper
Zinc
Iron
Tin
Gold is used in _________________.
Thermometer
Fuel
Jewellery
Machinery
Which material shows shiny appearance?
Coal
Sulphur
Aluminium
Carbon
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
Which of the following will displace copper from a solution of copper (II) sulphate?
I. Zn
II. Fe
III. Ag
IV. Mg
I and II only
II and III only
I, II and III only
I, II and IV only
All types of steel essentially contain
Iron and manganese
Iron and carbon
Manganese and chromium
Carbon and manganese
A silvery liquid element 'X' is a good conductor of heat and electricity at room temperature. The element 'X' is-
Magnesium
Mercury
Lead
Which of these are defined as elements which form negative ions by gaining electrons?
Metals
Metalloids
Non-metals
Noble metals.
Which of the following are liquid metals?
I. Platinum
II. Sodium
III. Mercury
IV. Gallium
III and IV only
IV and I only
The characteristic properties of non-metals are:
I. Formation of acidic oxides
II. High density
III. Tendency to form anions
I and III only
All of the above