Which of the following is not and example
Question: Which of the following is not and example of heterogeneous catalytic reaction ?Ostwald's processHaber's processCombustion of coalHydrogenation of vegetable oilsCorrect Option: , 3 Solution: Then is no catalyst is required for combustion of coal....
Read More →The anodic half-cell of lead-acid battery is recharged unsing electricity of
Question: The anodic half-cell of lead-acid battery is recharged unsing electricity of $0.05$ Faraday. The amount of $\mathrm{PbSO}_{4}$ electrolyzed in $\mathrm{g}$ during the process in : (Molar mass of $\mathrm{PbSO}_{4}=303$ g $\mathrm{mol}^{-1}$ )$22.8$$15.2$$7.6$$11.4$Correct Option: , 2 Solution:...
Read More →Which amongst the following is the strongest acid ?
Question: Which amongst the following is the strongest acid ? $\mathrm{CHI}_{3}$$\mathrm{CHCI}_{3}$$\mathrm{CHBr}_{3}$$\mathrm{CH}(\mathrm{CN})_{3}$Correct Option: , 4 Solution: CN makes anino most stable so answer is $\mathrm{CH}(\mathrm{CN})_{3}$...
Read More →Which of the graphs shown below does not represent
Question: Which of the graphs shown below does not represent the relationship between incident light and the electron ejected form metal surface ?Correct Option: , 3 Solution: $\mathrm{E}=\mathrm{W}+\frac{1}{2} \mathrm{mv}^{2}$ K.E. $=h v-4 v_{0}$ K.E. $=h v+\left(-h v_{0}\right)$ $\mathrm{y}=\mathrm{mx}+\underline{\mathrm{C}}$...
Read More →Arrange the following amines in the decreasing order of basicity:
Question: Arrange the following amines in the decreasing order of basicity: $\mathrm{I}\mathrm{II}\mathrm{III}$$\mathrm{III}\mathrm{II}\mathrm{I}$$\mathrm{I}\mathrm{III}\mathrm{II}$III I IICorrect Option: , 4 Solution:...
Read More →A process has
Question: A process has $\Delta \mathrm{H}=200 \mathrm{Jmol}^{-1}$ and $\Delta \mathrm{S}=40 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$. Out of the values given below, choose the minimum temperature above which the process will be spontaneous :$5 \mathrm{~K}$$4 \mathrm{~K}$$20 \mathrm{~K}$$12 \mathrm{~K}$Correct Option: 1 Solution: $\Delta \mathrm{G}=\Delta \mathrm{H}-\mathrm{T} \Delta \mathrm{S}$ $\mathrm{T}=\frac{\Delta \mathrm{H}}{\Delta \mathrm{S}}=\frac{200}{40}=5 \mathrm{~K}$...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: , 2 Solution:...
Read More →The decreasing order of ease of alkaline hydrolysis
Question: The decreasing order of ease of alkaline hydrolysis for the following esters is : $\mathrm{IV}\mathrm{II}\mathrm{III}\mathrm{I}$III $\mathrm{II}\mathrm{I}\mathrm{IV}$III II IV III III I IVCorrect Option: , 2 Solution: More is the electrophilic character of carbonyl group of ester faster is the alkaline hydrolysis....
Read More →The electronegativity of aluminium is similar to :
Question: The electronegativity of aluminium is similar to :BoronCarbonLithiumBerylliumCorrect Option: , 4 Solution: E.N. of $\mathrm{Al}=(1.5) \approx \mathrm{Be}(1.5)$...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: , 2 Solution:...
Read More →The following results were obtained during kinetic studies of the reaction
Question: The following results were obtained during kinetic studies of the reaction : $2 \mathrm{~A}+\mathrm{B} \rightarrow$ Products The time (in minutes) required to consume half of $A$ is :1051001Correct Option: , 2 Solution:...
Read More →Consider the following reduction processes :
Question: Consider the following reduction processes : $\mathrm{Zn}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Zn}(\mathrm{s}) ; \mathrm{E}^{\circ}=-0.76 \mathrm{~V}$ $\mathrm{Ca}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Ca}(\mathrm{s}) ; \mathrm{E}^{\circ}=-2.87 \mathrm{~V}$ $\mathrm{Mg}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Mg}(\mathrm{s}) ; \mathrm{E}^{\circ}=-2.36 \mathrm{~V}$ $\mathrm{Ni}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Ni}(\mathrm{s}) ; \mathrm{E}^{\circ}=-0.25 \mathrm{~V}$ T...
Read More →According to molecular orbital theory
Question: According to molecular orbital theory, which of the following is true with respect to $\mathrm{Li}_{2}^{+}$and $\mathrm{Li}_{2}^{-} ?$Both are unstable$\mathrm{Li}_{2}^{+}$is unstable and $\mathrm{Li}_{2}^{-}$is stable$\mathrm{Li}_{2}^{+}$is stable and $\mathrm{Li}_{2}^{-}$is unstableBoth are stabelCorrect Option: , 4 Solution:...
Read More →Liquids A and B form an ideal solution in the entire
Question: Liquids A and B form an ideal solution in the entire composition range. At $350 \mathrm{~K}$, the vapor pressures of pure A and pure $\mathrm{B}$ are $7 \times 10^{3} \mathrm{~Pa}$ and $12 \times 10^{3} \mathrm{~Pa}$, respectively. The composition of the vapor in equilibrium with a solution containing 40 mole percent of A at this temperature is:$\mathrm{x}_{\mathrm{A}}=0.37 ; \mathrm{x}_{\mathrm{B}}=0.63$$\mathrm{x}_{\mathrm{A}}=0.28 ; \mathrm{x}_{\mathrm{B}}=0.72$$\mathrm{x}_{\mathrm{...
Read More →The increasing order of pKa of the following amino acids in aqueous solution is :
Question: The increasing order of pKa of the following amino acids in aqueous solution is : Gly Asp Lys ArgAsp $$ Gly $$ Arg $$ Lys$\operatorname{Arg}$ Lys $$ Gly $$ AspGly Asp $$ Arg $$ LysAsp $$ Gly $$ Lys $$ ArgCorrect Option: , 4 Solution:...
Read More →The increasing order of the
Question: The increasing order of the $\mathrm{pKa}$ values of the following compounds is : $\mathrm{D}\mathrm{A}\mathrm{C}\mathrm{B}$$\mathrm{B}\mathrm{C}\mathrm{D}\mathrm{A}$$\mathrm{C}\mathrm{B}\mathrm{A}\mathrm{D}$$\mathrm{B}\mathrm{C}\mathrm{A}\mathrm{D}$Correct Option: , 4 Solution: Acidic strength is inversely proportional to pka....
Read More →A water sample has ppm level concentration of the following metals:
Question: A water sample has ppm level concentration of the following metals: $\mathrm{Fe}=0.2 ; \mathrm{Mn}=5.0 ; \mathrm{Cu}=3.0$; $\mathrm{Zn}=5.0$. The metal that makes the water sample unsuitable drinking is :$\mathrm{Zn}$$\mathrm{Fe}$$\mathrm{Mn}$$\mathrm{Cu}$Correct Option: , 3 Solution:...
Read More →Water filled in two glasses A and B have BOD values
Question: Water filled in two glasses A and B have BOD values of 10 and 20 , respectively. The correct statement regarding them, is :$\mathrm{A}$ is more polluted than $\mathrm{B}$A is suitable for drinking, whereas B is not$\mathrm{B}$ is more polluted than $\mathrm{A}$Both A and B are suitable for drinkingCorrect Option: , 3 Solution: Two glasses "A" and "B" have BOD values 10 and "20", respectively. Hence glasses "B" is more polluted than glasses "A"....
Read More →A solution of sodium sulfate contains
Question: A solution of sodium sulfate contains $92 \mathrm{~g}$ of $\mathrm{Na}^{+}$ions per kilogram of water. The molality of $\mathrm{Na}^{+}$ions in that solution in $\mathrm{mol} \mathrm{kg}^{-1}$ is:168412Correct Option: , 4 Solution:...
Read More →Consider the given plots for a reaction obeying
Question: Consider the given plots for a reaction obeying Arrhenius equation $\left(0^{\circ} \mathrm{C}\mathrm{T}300^{\circ} \mathrm{C}\right)$ : $(\mathrm{k}$ and $\mathrm{E}_{\mathrm{a}}$ are rate constant and activation energy, respectively) Choose the correct option :Both I and II are wrongI is wrong but II is rightBoth I and II are correctI is right but II is wrongCorrect Option: , 4 Solution: On increasing $E_{a}, K$ decreases...
Read More →The metal used for making X-ray tube window is:
Question: The metal used for making X-ray tube window is:$\mathrm{Mg}$$\mathrm{Na}$$\mathrm{Ca}$$\mathrm{Be}$Correct Option: , 3, 4 Solution: "Be" Metal is used in $\mathrm{x}$-ray window is due to transparent to $\mathrm{x}$-rays....
Read More →In general, the properties that decrease and increase down a group in the periodic table, respectively, are :
Question: In general, the properties that decrease and increase down a group in the periodic table, respectively, are : electronegativity and electron gain enthalpy.electronegativity and atomic radius.atomic radius and electronegativity.electron gain enthalpy and electronegativity.Correct Option: , 2 Solution:...
Read More →The type of hybridisation and number of lone pair(s) of
Question: The type of hybridisation and number of lone pair(s) of electrons of $\mathrm{Xe}$ in $\mathrm{XeOF}_{4}$, respectively, are :$\operatorname{sp}^{3} d$ and 1$s p^{3} d$ and 2$\mathrm{sp}^{3} \mathrm{~d}^{2}$ and 1$s p^{3} d^{2}$ and 2Correct Option: , 3 Solution:...
Read More →The major product of following reaction is :
Question: The major product of following reaction is : RCHO$\mathrm{RCOOH}$$\mathrm{RCH}_{2} \mathrm{NH}_{2}$$\mathrm{RCONH}_{2}$Correct Option: 1 Solution:...
Read More →If dichloromethane (DCM) and water
Question: If dichloromethane (DCM) and water $\left(\mathrm{H}_{2} \mathrm{O}\right)$ are used for differential extraction, which one of the following statements is correct?$\mathrm{DCM}$ and $\mathrm{H}_{2} \mathrm{O}$ would stay as lower and upper layer respectively in the S.F.DCM and $\mathrm{H}_{2} \mathrm{O}$ will be miscible clearly$\mathrm{DCM}$ and $\mathrm{H}_{2} \mathrm{O}$ would stay as upper and lower layer respectively in the separating funnel (S.F.)$\mathrm{DCM}$ and $\mathrm{H}_{2...
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