Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Polluted water may have a value of BOD of the order of 17 ppm.
Reason R: BOD is a measure of oxygen required to oxidise both the bio-degradable and non-biodegradable organic material in water.
In the light of the above statements, choose the most appropriate answer from the options given below.
Assertion A: A mixture contains benzoic acid and naphthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason R: Benzoic acid is soluble in hot water.
In the given reaction
‘A’ can be
The major product formed in the following reaction, is
The correct order of reduction potentials of the following pairs is
(A)\( \frac{Cl_2}{Cl^–}\)
(B)\( \frac{I_2}{I^–}\)
(C) \(\frac{Ag^+}{Ag}\)
(D) \(\frac{Na^+}{Na}\)
(E) \(\frac{Li^+}{ Li}\)
Choose the correct answer from the options given below:
Which of the following sets of quantum numbers is not allowed?
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)
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
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 :
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 :
Which one of the following reactions does not represent correct combination of substrateand product under the given conditions?
Melamine polymer is formed by the condensation of :
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 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)
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)
