Using the rules for significant figures, the correct answer for the expression\(\frac{0.02858 × 0.112}{ 0.5702}\)will be
A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio of \(\frac{[CH_3CH_2COO^−]}{[CH_3CH_2COOH] }\)required to make buffer is _____.Given : Ka(CH3CH2COOH) = 1.3 × 10–5
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 :
Melamine polymer is formed by the condensation of :
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)
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 reaction of H2O2 with potassium permanganate in acidic medium leads to the formation of mainly
Which one of the following reactions does not represent correct combination of substrateand product under the given conditions?
The number of sp3 hybridised carbons in an acyclic neutral compound with molecular formula C4H5N is ________.
Match List-I with List-II.
Choose the correct answer from the options given below :
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 interhalogen compound formed from the reaction of bromine with excess of fluorine is a :
The photochemical smog does not generally contain :
Drugs used to bind to receptors, inhibiting its natural function and blocking a message are called:
