If the angle made by the tangent at the point (x0, y0) on the curve x = 12(t + sin t cos t),
\(y=12(1+sint)^2,0<t<\frac{π}{2}, \)
with the positive x-axis is π/3, then y0 is equal to
In a potentiometer arrangement, a cell gives a balancing point at 75 cm length of wire. This cell is now replaced by another cell of unknown emf. If the ratio of the emf’s of two cells respectively is 3 : 2, the difference in the balancing length of the potentiometer wire in above two cases will be _____ cm.
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 :
The photochemical smog does not generally contain :
Which one of the following reactions does not represent correct combination of substrateand product under the given conditions?
An organic compound ‘A’ on reaction with NH3 followed by heating gives compound B. Which on further strong heating gives compound C(C8H5NO2). Compound C on sequential reaction with ethanolic KOH, alkyl chloride and hydrolysis with alkali gives a primary amine. The compound A is :
Melamine polymer is formed by the condensation of :
Drugs used to bind to receptors, inhibiting its natural function and blocking a message are called:
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)
