Q. The number of moles of solute present in 1 kg of a solvent is called its

? Molality

Q. The most electronegative element among the following is

? Fluorine

Q. The metal used to recover copper from a solution of copper sulphate is

? Fe

Q. The number of d-electrons in Fe²⁺ (Z = 26) is not equal to that of

? p-electrons in CI(Z = 17)

Q. The metallurgical process in which a metal is obtained in a fused state is called

? Smelting

Q. The molecules of which gas have highest speed ?

? H₂ at -73^oC

Q. The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is

? Henry’s law

Q. The gas present in the stratosphere which filters out some of the sun’s ultraviolet light and provides an effective shield against radiation damage to living things is

? Ozone

Q. The most commonly used bleaching agent is

? Chlorine

Q. The nucleus of a hydrogen atom consists of

? 1 proton only

Q. The heat required to raise the temperature of body by 1 K is called

? Thermal capacity

Q. The nuclear particles which are assumed to hold the nucleons together are

? Mesons