The IUPAC name of the following compound is :

Which of the following statements is not true about partition chromatography?

A mixture containing the following four compounds is extracted with $$1M$$ $$HCl.$$ The compound that goes to aqueous layer is :

Which of the following molecules is least resonance stabilized?

Given, $$C_{(graphite)}+O_2\to C{O}_2(g)$$; $${\Delta }_r{H}^o$$ = - 393.5 kJ mol-1 $${\mathrm{H}}_2(g)$$ + {1 \over 2}{O_2}(g)$$\to {\mathrm{H}}_2\mathrm{O}(l)$$ $${\Delta }_r{H}^o$$ = - 285.8 kJ mol-1 $$C{O}_2(g)$$ + $$2{\mathrm{H}}_2\mathrm{O}(l)\to$$ $$C{H}_4(g)$$ + $$2O_2(g)$$ $${\Delta }_r{H}^o$$ = + 890.3 kJ mol-1 Based on the above thermochemical equations, the value of $${\Delta }_r{H}^o$$ at 298 K for the reaction $$C_{(graphite)}$$ + $$2{\mathrm{H}}_2(g)\to$$ $$C{H}_4(g)$$ will be :

A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is 5 J and 8 J, respectively. Now gas is brought back to A by another process during which 3 J of heat is evolved. In this reverse process of B to A :

An ideal gas undergoes isothermal expansion at constant pressure. During the process :

The enthalpy change on freezing of 1 mol of water at 5oC to ice at −5oC is : (Given $$\Delta$$fusH = 6 kJ mol$$-$$1 at 0oC, Cp(H2O, $$\ell$$ = 75.3J mol$$-$$1 K$$-$$1) Cp(H2O s) =36.8 J mol$$-$$1 K$$-$$1)

For a reaction, A(g) $$\to$$ A($$\ell$$); $$\Delta$$H= $$-$$ 3RT. The correct statement for the reaction is :

$$\Delta$$U is equal to :

A solution containing a group-IV cation gives a precipitate on passing H2S. A solution of this precipitate in dil.HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is :

The major product obtained in the following reaction is :

The correct sequence of reagents for the following conversion will be :

A compound of molecular formula C8H8O2 reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with conc. NaOH forms benzyl alcohol as one of the products. The structure of the compound is :

Excess of NaOH (aq) was added to 100 mL of FeCl3 (aq) resulting into 2.14 g of Fe(OH)3 . The molarity of FeCl3 (aq) is : (Given molar mass of Fe = 56 g mol−1 and molar mass of Cl = 35.5 g mol−1)

What quantity (in mL) of a 45% acid solution of a mono-protic strong acid must be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid solution ?

1 gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2. The molar mass of M2CO3 in g mol–1 is:

The most abundant elements by mass in the body of a healthy human adult are: Oxygen (61.4%); Carbon (22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all 1H atoms are replaced by 2H atoms is:

5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.82oC. If Na2SO4 is 81.5% ionised, the value of x (Kf for water=1.86oC kg mol−1) is approximately : (molar mass of S = 32 g mol−1 and that of Na = 23 g mol−1)

A solution is prepared by mixing 8.5 g of CH2Cl2 and 11.95 g of CHCl3 . If vapour pressure of CH2Cl2 and CHCl3 at 298 K are 415 and 200 mmHg respectively, the mole fraction of CHCl3 in vapour form is : (Molar mass of Cl = 35.5 g mol−1)