Copper crystallizes in fcc with a unit cell length of 361 pm. What is the radius of copper atom?

Which of the following on heating with aqueous KOH, produces acetaldehyde ?

The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the chemical reaction will be (log 2=0.301) :

Which of the following statements is incorrect regarding physisorptions ?

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :

Which one of the following reactions of Xenon compounds is not feasible?

The number of stereoisomers possible for a compound of the molecular formula CH3 - CH = CH - CH(OH) - Me is :

Arrange the carbanions, $$(C{H}_3{)}_3\overline{C}$$, $$\overline{C}C{l}_3$$ , $$(C{H}_3{)}_2\overline{C}H$$, $$C_6{H}_5\overline{C}H{}_2$$ in order of their decreasing stability :

The IUPAC name of neopentane is

The alkene that exhibits geometrical isomerism is :

On the basis of the following thermochemical data : ($${\Delta }_f{G}^o{H}_{(aq)}^{+}$$ = 0) H2O(l) $$\to$$ H+(aq) + OH-(aq); $$\Delta H$$ = 57.32 kJ H2(g) + {1 \over 2} O_2(g) \to H2O(l); $$\Delta H$$ = -286.20 kJ The value of enthalpy of formation of OH− ion at 25oC is :

A liquid was mixed with ethanol and a drop of concentrated H2SO4 was added. A compound with a fruity smell was formed. The liquid was :

In Cannizzaro reaction given below 2PhCHO \buildrel {\mathop {:OH}\limits^{\left( - \right)} } \over \longrightarrow PhCH2OH + $$PhC\stackrel{..}{O}$$2(-) the slowest step is :

A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution ?

Two liquids X and Y form an ideal solution. At 300K, vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mm Hg) of X and Y in their pure states will be, respectively :

Given : $$E_{F{e}^{3+}/Fe}^o$$ = -0.036V; $$E_{F{e}^{2+}/Fe}^o$$ = -0.439 V The value of standard electrode potential for the change, Fe3+ (aq) + e- $$\to$$ Fe2+ (aq) will be

In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is CH3OH(l) + 3/2O2 $$\to$$ CO2 (g) + 2H2O (l) At 298K standard Gibb’s energies of formation for CH3OH(l), H2O(l) and CO2 (g) are -166.2, -237.2 and -394.4 kJ mol−1 respectively. If standard enthalpy of combustion of methanol is -726 kJ mol−1, efficiency of the fuel cell will be

Buna-$$N$$ synthetic rubber is a copolymer of :

In context with the transition elements, which of the following statements is incorrect ?

Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect?