Amongst the following statements, that which was not proposed by Dalton was

The number of statement(s) correct from the following for copper (at no. \(29\)) is/are \(...\) \((A)\,Cu\) \((II)\) complexes are always paramagnetic \((B)\,Cu\) \((I)\) complexes are generally colourless \((C)\,Cu\) \(( I )\) is easily oxidized \((D)\) In Fehling solution, the active reagent has \(Cu\) \(( I )\)

Number of compounds among the following which contain sulphur as heteroatom is _______. [Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine]

For the given first order reaction \(\text { A } \rightarrow \text { B }\) the half life of the reaction is \(0.3010\,min\). The ratio of the initial concentration of reactant to the concentration of reactant at time \(2.0\,min\) will be equal to \(........\) (Nearest integer)

Solid Lead nitrate is dissolved in \(1\,litre\) of water. The solution was found to boil at \(100.15^{\circ}\,C\). When \(0.2\,mol\) of \(NaCl\) is added to the resulting solution, it was observed that the solution froze at \(-0.8^{\circ}\,C\). The solutbility product of \(PbCl _2\) formed is \(...........\times 10^{-6}\) at \(298\,K\). (Nearest integer) Given : \(K _{ b }=0.5\,K\,kg\,mol ^{-1}\) and \(K _{ f }=1.8\,kg\,mol ^{-1}\). Assume molality to be equal to molarity in all cases.

The reaction \(MgO(s) + C(s) \to Mg(s) + CO(g)\), for which \(\Delta _r{H^o} =  + 491.1\,kJ\,mo{l^{ - 1}}\) and \(\Delta _r{S^o} =  198.0\,Jk^{-1}\,mo{l^{ - 1}}\) is not feasible at \(298\, K\). Temperature above which reaction will be feasible is.....\(K\)

The volume of \(HCl\), containing \(73\,g\,L ^{-1}\), required to completely neutralise \(NaOH\) obtained by reacting \(0.69\,g\) of metallic sodium with water, is \(........mL\). (Nearest Integer) (Given : molar Masses of \(Na , Cl , O , H\) are \(23\), \(35.5,16\) and \(1\,g\,mol ^{-1}\) respectively)

The line \(y=x+1\) meets the ellipse \(\frac{x^{2}}{4}+\frac{y^{2}}{2}=1\) at two points \(P\) and \(Q\). If \(r\) is the radius of the circle with \(PQ\) as diameter then \((3 r )^{2}\) is equal to

A bag is gently dropped on a conveyor belt moving at a speed of \(2\,m / s\). The coefficient of friction between the conveyor belt and bag is \(0.4\) Initially, the bag slips on the belt before it stops due to friction. The distance travelled by the bag on the belt during slipping motion is \(.....m\) [Take \(g=10\,m / s ^{-2}\) ]

Consider the following equilibrium, \(\mathrm{CO}(\mathrm{g})+2 \mathrm{H}_2(\mathrm{g}) \rightleftharpoons \mathrm{CH}_3 \mathrm{OH}(\mathrm{g})\) 0.1 mol of CO along with a catalyst is present in a \(2 \mathrm{dm}^3\) flask maintained at 500 K. Hydrogen is introduced into the flask until the pressure is 5 bar and 0.04 mol of \(\mathrm{CH}_3 \mathrm{OH}\) is formed. The \(\mathrm{K}_{\mathrm{p}}^0\) is ______ \(\times 10^{-3}\) (nearest integer).
Given : \(\mathrm{R}=0.08 \mathrm{dm}^3\) bar \(\mathrm{K}^{-1} \mathrm{~mol}^{-1}\)
Assume only methanol is formed as the product and the system follows ideal gas behaviour.

Let \(n\) be a positive integer. Let  \(A =\sum_{ k =0}^{ n }(-1)^{ k } n _{ C _{ k }}\left[\left(\frac{1}{2}\right)^{ k }+\left(\frac{3}{4}\right)^{ k }+\left(\frac{7}{8}\right)^{ k }+\left(\frac{15}{16}\right)^{ k }+\left(\frac{31}{32}\right)^{ k }\right]\) . If \(63 A =1-\frac{1}{2^{30}},\) then \(n\) is equal to ...... .

If the function \(f(x)=\frac{1}{x} \log _{e}(\frac{1+\frac{x}{a}}{1-\frac{x}{b}}) , \quad x<0\) \(\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad k \quad, \quad x=0\) \(\quad\quad\quad\quad\quad\quad\quad\quad\quad\quad\frac{\cos ^{2} x-\sin ^{2} x-1}{\sqrt{x^{2}+1}-1} ,\,\,\, x>0\) is continuous at \(x=0\), then \(\frac{1}{a}+\frac{1}{b}+\frac{4}{k}\) is equal to :

Which of the following phenomena can not be explained by wave theory of light ?