For the following questions answer them individually
The wavelength of spectral line obtained in the spectrum of $$Li^{2+}$$ ion, when the transition takes place between two levels whose sum is 4 and difference is 2, is
Find out the statements which are not true.
A. Resonating structures with more number of covalent bonds and lesser charge separntion are more stable.
B. In electromeric effect, an unsaturated system shows +E effect with nucleophile and -E effect with electrophile.
C. Inductive effect is responsible for high melting point, boiling point and dipole moment of polar compotmds.
D. The greater the number of alkyl groups attached to the doubly bonded carbon atoms, higher is the heat of hydrogenation.
E. Stability of carbanion increases with the increase in s - character of the carbon carrying the negative charge.
Choose the correct answer from the options given below:
"X" is an oxoanion of the lightest element of group 7 (in the periodic table). The metal is in +6 oxidation state in "X". The color of the potassium salt of X is
Consider the following gaseous equilibrimn in a closed container of volume 'V' at T(K).
$$P_{2}(g)+Q_{2}(g)\rightleftharpoons 2PQ(g)$$
2 moles each of $$P_{2}(g)$$, $$Q_{2}(g)$$ and PQ(g) are present at equilibrium. Now one mole each of'$$P_{2}$$' and '$$Q_{2}$$' are added to the equilibrium keeping the temperature at T(K). The number of moles of $$P_{2}$$, $$Q_{2}$$ and PQ at the new equilibrium, respectively, are
A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of aniline. However, the student has managed to obtain 11 g of dry acetanilide.
The % yield of this reaction is :-
From the following, how many compounds contain at least one secondary alcohol?
Image:
Choose the correct answer from the options given below:
Given below are two statements:
Statement I: The dipole moment of R-CN is greater than R-NC and R-NC can undergo hydrolysis under acidic medium to produce $${O\\||\\} R-C-OH.$$
Statement II: R-CN hydrolyses under acidic medium to produce a compound which on treatment with $$SOCl_{2}$$, followed by the addition of $$NH_{3}$$ gives another compound(x). This compound (x) on treatment with NaOCl/NaOH gives a product, that on treatment with $$CHCl_{3}/KOH/ \Delta$$ produces R-NC
In the Light of the above statements, choose the correct answer from the options given below
The heat of atomisation of methane and ethane are 'x' kJ $$mol^{-1}$$ and 'y' kJ $$mol^{-1}$$ respectively. The longest wavelength ($$\lambda$$) of light capable of breaking the C-C bond
can be expressed in SI unit as:
At 298 K, the mole percentage of $$N_{2}$$(g) in air is 80%. Water is in equilibrium with air at a pressure of 10 atm. What is the mole fraction of $$N_{2}$$(g) in water at 298 K?
($$K_{H}$$ for $$N_{2}$$ is $$6.5 \times 10^{7}$$ mm Hg)
Choose the INCORRECT statement
