Which of the following statements is incorrect regarding metals?
Metals are ductile.
Metals are sonorous.
Metals have a shiny appearance.
Metals are poor conductors of heat.
Which of the following statements is correct?
Metals are good conductors of heat.
Metals are poor conductors of electricity.
Lead and mercury are good conductors of heat.
Silver and copper are poor conductors of electricity
From the below statements which is wrong one
Froth floatation is used for the concentration of sulphide ores
Calcination is used to remove the impurity from CaCO3
Powdered ore is strongly heated. This process is roasting.
From Magnetic nature of ore impurity is removed using magnetic roller.
Raju made an electric circuit to test the electrical conductivity of different substances, namely an iron nail, a plastic wire, an eraser, and a candle. He inserted each of these substances in the circuit between terminals X and Y (as shown in the given figure).
The insertion of which of the following substances will make the bulb glow in the given circuit?
A plastic wire
An iron nail
An eraser
A candle
Which are the alloys of zinc?
Brass, bronze
German silver, brass
Bronz , coinage alloy
Coinage alloy, german silver
Which is the reducing agent in the extraction of Iron?
CaCO3
FeO
CO
SiO2
Which of the following is the carbonate ore of zinc?
Zincite
Calamine
Sphalerite
Hemimorphite
Which physical property of a gas is described by using the fountain experiment?
Vapour density
Solubility in water
Colour
Odour
