Thin wires can be drawn from a piece of metal. Which property of the metal is it responsible for?
(A) ductility
(B) hardness
(C) malleability
(D) conductivity
The property of metal by which it can be drawn into wires is called ductility.
Food is cooked in a metal utensil because it is the source of heat.
(A) is a good conductor
(B) is a semiconductor
(C) is a bad conductor
(D) is both a conductor and a good conductor
Melting and boiling points of ionic compounds -
(A) contains the following
(B) are high
(C) are normal
(D) All the statements are true
Which metal can be cut with a knife among sodium, lithium, calcium and nickel?
(A) Sodium
(B) Lithium
(C) calcium
(D) all
Alkali metals (lithium, sodium, potassium) are so soft that they can be cut with a knife. The freshly cut surface is a shiny, silver colour, but this tarnishes quickly to a dull grey as the metal reacts with oxygen and water in the air.
Silver and copper heat?
(A) are the best drivers
(B) are less conductors
(C) are dielectrics
(D) is the best conductor
(A) a nonpolar molecule with polar bonds
(B) a nonpolar molecule with nonpolar bonds
(C) a polar molecule with polar bonds
(D) a polar molecule with nonploar bonds
In which state of matter, the distance between the molecules is minimum ?
(A) Solid
(B) Liquid
(C) Gas
(D) Plasma
Which energy is converted into electrical energy by a solar cell?
(A) Chemical Energy
(B) Nuclear energy
(C) Solar energy
(D) Magnetic energy
Atomic number of which of the following elements is greater than that of Copper?
(A) Zinc
(B) Manganese
(C) Iron
(D) Chromium
Methane an air pollutant is produced ___________
(A) by burning of coal in insufficient air
(B) by digestion of food by animals
(C) by action of ultraviolet light on nitrogenous compounds.
(D) as a by-product of manufacturing ammoniacal fertilizers
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