The enthalpy of combustion of propane, graphite and dihydrogen at 298 K are –2220.0 kJ mol–1, –393.5 kJ mol–1 and –285.8 kJ mol–1, respectively. The magnitude of enthalpy of formation of propane (C3H8) is _____ kJ mol–1. (Nearest integer)
The photochemical smog does not generally contain :
The geometry around boron in the product ‘B’ formed from the following reaction is
Match List-I with List-II.
Choose the correct answer from the options given below :
The IUPAC nomenclature of an element with electronic configuration [Rn] 5f146d17s2 is
Consider the following metal complexes:[Co(NH3)6]3+[CoCl(NH3)5]2+[Co(CN)6]3–[Co(NH3)5(H2O)]3+The spin-only magnetic moment value of the complex that absorbs light with shortest wavelength is _______ B.M. (Nearest integer)
Drugs used to bind to receptors, inhibiting its natural function and blocking a message are called:
Melamine polymer is formed by the condensation of :
A compound’A’ on reaction with ‘X’ and ‘Y’ produces the same major product but differentby product’a’ and ‘b’. Oxidation of’a’ gives a substance produced by ants.
The depression in the freezing point observed for a formic acid solution of concentration 0.5 mL L–1 is 0.0405°C. Density of formic acid is 1.05 g mL–1. The Van’t Hoff factor of the formic acid solution is nearly (Given for water kf = 1.86 k kg mol–1)
Among Co3+, Ti2+, V2+ and Cr2+ ions, one if used as a reagent cannot liberate H2 from dilute mineral acid solution, its spin-only magnetic moment in gaseous state is________ B.M. (Nearest integer)
The half-life for the decomposition of gaseous compound A is 240 s when the gaseous pressure was 500 torr initially. When the pressure was 250 torr, the half-life was found to be 4.0 min. The order of the reaction is ______. (Nearest integer)
The reaction of H2O2 with potassium permanganate in acidic medium leads to the formation of mainly
Which of the following sets of quantum numbers is not allowed?
Choose the correct order of density of the alkali metals.
The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :
The compound(s) that is(are) removed as slag during the extraction of copper is(A)CaO,(B)FeO,(C)Al2O3,(D)ZnO,(E)NiOChoose the correct answer from the options given below :
