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When Magnesium reacts with oxygen, heat is
The number of atoms present in 2.5moles of a triatomic gas is equivalent to [1mole = \(6.02\times 10^{23}\)]
In a saturated solution at a given temperature, the undissolved solutes are in equilibrium with
Graphite and Diamond are similar in that they
A 0.1\(moldm^{-3}\) solution of sodium hydroxide was diluted with distilled water to 0.001\(moldm^{-3}\). What is the dilution factor?
Which of the following statements about endothermic reaction is correct?
The use of diamond in abrasives is due to its
The properties of a good primary standard include the following except
The bond angle in tetrahedral molecules such as tetrachloromethane is
Which of the following statements is correct?
The ionization energy is affected by the following factors except
The oxidation number of X in \(XO_{4}^{3-}\) is
Which of the following substances does not have van der Waals' forces?
Which of the following metals has the strongest metallic bond?
Which of the following arrangements indicates the correct decreasing order of ionization energy of period 3 elements?
The oxidation number of nitrogen in \(Pb(NO_{3})_{2}\) is
The reason for the decrease in the atomic size of elements across a period is that
The property of elements which increases down a group of the periodic table is
Atomic orbital is
The mass of one mole of \((NH_{4})_{2}CO_{3}\) is [O=16.0, N=14.0, C=12.0, H=1.0]