20242.The number of d-electrons in Fe2+ (Z = 26) is not equal to that of
p-electrons in Ne(Z = 10)
s-electrons in Mg(Z = 12)
d-electrons in Fe(Z = 26)
p-electrons in CI(Z = 17)
20244.The molecules of which gas have highest speed?
H2 at -73oC
CH4 at 300 K
N2 at 1,027oC
O2 at 0oC
20246.The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is
Daltons law
Gay Lussacs law
Henrys law
Raoults law
20247.The main buffer system of the human blood is
H2CO3 - HCO3
H2CO3 - CO32-
CH3COOH - CH3COO-
NH2CONH2 - NH2CONH+
20245.The oldest rocks in the earths crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rocks called
granite
basalt
igneous rocks
sedimentary rocks
20238.The nucleus of an atom consists of
electrons and neutrons
electrons and protons
protons and neutrons
All of the above
20243.The metallurgical process in which a metal is obtained in a fused state is called
smelting
roasting
calcinations
froth floatation
20239.The number of moles of solute present in 1 kg of a solvent is called its
molality
molarity
normality
formality