The oxoacid of sulphur that does not contain bond between sulphur atoms is :
Question: The oxoacid of sulphur that does not contain bond between sulphur atoms is :$\mathrm{H}_{2} \mathrm{~S}_{4} \mathrm{O}_{6}$$\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}$$\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}$$\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{4}$Correct Option: , 2 Solution: $\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}$ does not contain bond between sulphur atoms....
Read More →The major product of the following reaction is :
Question: The major product of the following reaction is : Correct Option: 1 Solution:...
Read More →Consider the van der Waals constants,
Question: Consider the van der Waals constants, a and b, for the following gases. Which gas is expected to have the highest critical temperature?$\mathrm{Kr}$$\mathrm{Ne}$$\mathrm{Ar}$$\mathrm{Xe}$Correct Option: 1 Solution: $\therefore \mathrm{T}_{\mathrm{c}}$ has order $: \mathrm{Kr}\mathrm{Xe}\mathrm{Ar}\mathrm{Ne}$...
Read More →The correct order of catenation is :
Question: The correct order of catenation is :$\mathrm{C}\mathrm{Si}\mathrm{Ge} \approx \mathrm{Sn}$$\mathrm{C}\mathrm{Sn}\mathrm{Si} \approx \mathrm{Ge}$$\mathrm{Ge}\mathrm{Sn}\mathrm{Si}\mathrm{C}$$\mathrm{Si}\mathrm{Sn}\mathrm{C}\mathrm{Ge}$Correct Option: 1 Solution: As we move down the group, bond strength decreases, thereby decreasing the catenation tendency. Hence the order is as expected $\mathrm{C}\mathrm{Si}\mathrm{Ge} \approx \mathrm{Sn}$...
Read More →The ore that contains the metal in the form of fluoride is :
Question: The ore that contains the metal in the form of fluoride is :magnetitesphaleritemalachitecryoliteCorrect Option: , 4 Solution:...
Read More →A bacterial infection in an internal wound grows as
Question: A bacterial infection in an internal wound grows as $N^{\prime}(t)=N_{0} \exp (t)$, where the time $t$ is in hours. A dose of antibiotic, taken orally, needs 1 hour to reach the wound. Once it reaches there, the bacterial population goes down as $\frac{\mathrm{dN}}{\mathrm{dt}}=-5 \mathrm{~N}^{2}$. What will be the plot of $\frac{\mathrm{N}_{0}}{\mathrm{~N}}$ vs. t after 1 hour ?Correct Option: 1 Solution:...
Read More →The increasing order of reactivity of the following compounds
Question: The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is : $\mathrm{D}\mathrm{B}\mathrm{A}\mathrm{C}$$\mathrm{A}\mathrm{B}\mathrm{C}\mathrm{D}$$\mathrm{D}\mathrm{A}\mathrm{C}\mathrm{B}$$\mathrm{B}\mathrm{C}\mathrm{A}\mathrm{D}$Correct Option: 3, Solution:...
Read More →The standard Gibbs energy for the given cell reaction
Question: The standard Gibbs energy for the given cell reaction in $\mathrm{kJ} \mathrm{mol}^{-1}$ at $298 \mathrm{~K}$ is : $\mathrm{Zn}(\mathrm{s})+\mathrm{Cu}^{2+}(\mathrm{aq}) \rightarrow \mathrm{Zn}^{2+}(\mathrm{aq})+\mathrm{Cu}(\mathrm{s})$ $\mathrm{E}^{\circ}=2 \mathrm{~V}$ at $298 \mathrm{~K}$ (Faraday's constant, $\mathrm{F}=96000 \mathrm{C} \mathrm{mol}^{-1}$ )$-384$$-192$192384Correct Option: 1 Solution:...
Read More →The osmotic pressure of a dilute solution of an ionic compound
Question: The osmotic pressure of a dilute solution of an ionic compound $\mathrm{XY}$ in water is four times that of a solution of $0.01 \mathrm{M} \mathrm{BaCl}_{2}$ in water. Assuming complete dissociation of the given ionic compounds in water, the concentration of $X Y$ (in $\mathrm{mol} \mathrm{L}^{-1}$ ) in solution is :$6 \times 10^{-2}$$4 \times 10^{-4}$$16 \times 10^{-4}$$4 \times 10^{-2}$Correct Option: 1 Solution:...
Read More →Among the following,
Question: Among the following, the set of parameters that represents path function, is : (A) $q+w$ (B) $q$ (C) $\mathrm{W}$ (D) H-TS(A) and (D)(B), (C) and (D)(B) and (C)(A), (B) and (C)Correct Option: , 3 Solution:...
Read More →The major product of the following reaction is :
Question: The major product of the following reaction is : $\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{2} \mathrm{NH}_{2}$Correct Option: , 2 Solution: as $\mathrm{NH}_{2}$ is a better nucleophile than $\mathrm{OH}$....
Read More →C60, an allotrope of carbon contains :
Question: $\mathrm{C}_{60}$, an allotrope of carbon contains :20 hexagons and 12 pentagons.12 hexagons and 20 pentagons.18 hexagons and 14 pentagons.16 hexagons and 16 pentagons.Correct Option: 1 Solution: In $\mathrm{C}_{60}$ molecule there are 20 hexagons and 12 pentagons...
Read More →The correct IUPAC name of the following compound is :
Question: The correct IUPAC name of the following compound is : 5 -chloro-4-methyl-1-nitrobenzene2-methyl-5-nitro-1-chlorobenzene3-chloro-4-methyl-1-nitrobenzene2-chloro-1-methyl-4-nitrobenzeneCorrect Option: 4, Solution:...
Read More →The number of water molecule(s) not coordinated to copper
Question: The number of water molecule(s) not coordinated to copper ion directly in $\mathrm{CuSO}_{4} .5 \mathrm{H}_{2} \mathrm{O}$, is :4312Correct Option: , 3 Solution: One water molecule as shown in the diagram, is not coordinated to copper ion directly....
Read More →For a reaction,
Question: For a reaction, $\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{NH}_{3}(\mathrm{~g})$ identify dihydrogen $\left(\mathrm{H}_{2}\right)$ as a limiting reagent in the following reaction mixtures.$14 \mathrm{~g}$ of $\mathrm{N}_{2}+4 \mathrm{~g}$ of $\mathrm{H}_{2}$$28 \mathrm{~g}$ of $\mathrm{N}_{2}+6 \mathrm{~g}$ of $\mathrm{H}_{2}$$56 \mathrm{~g}$ of $\mathrm{N}_{2}+10 \mathrm{~g}$ of $\mathrm{H}_{2}$$35 \mathrm{~g}$ of $\mathrm{N}_{2}+8 \mathrm{~g}$ of...
Read More →The two monomers for the synthesis of Nylone 6,6 are :
Question: The two monomers for the synthesis of Nylone 6,6 are :$\mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{6} \mathrm{COOH}, \mathrm{H}_{2} \mathrm{~N}\left(\mathrm{CH}_{2}\right)_{6} \mathrm{NH}_{2}$$\mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{COOH}, \mathrm{H}_{2} \mathrm{~N}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{NH}_{2}$$\mathrm{HOOC}\left(\mathrm{CH}_{2}\right)_{6} \mathrm{COOH}, \mathrm{H}_{2} \mathrm{~N}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{NH}_{2}$$\mathrm{HOOC}\left(\math...
Read More →The mojor product of the following reaction is :
Question: The mojor product of the following reaction is : Correct Option: , 2 Solution:...
Read More →If the de Broglie wavelength of the electron in
Question: If the de Broglie wavelength of the electron in $\mathrm{n}^{\text {th }}$ Bohr orbit in a hydrogenic atom is equal to $1.5 \pi \mathrm{a}_{0}\left(\mathrm{a}_{0}\right.$ is Bohr radius), then the value of $\mathrm{n} / \mathrm{z}$ is :$1.0$$0.75$$0.40$$1.50$Correct Option: 2 Solution: According to de-broglie's hypothesis $2 \pi \mathrm{r}_{\mathrm{n}}=\mathrm{n} \lambda \Rightarrow 2 \pi \cdot \mathrm{a}_{0}=\frac{\mathrm{n}^{2}}{\mathrm{z}}=\mathrm{n} \times 1.5 \pi \mathrm{a}_{0}$ $...
Read More →The aerosol is a kind of colloid in which :
Question: The aerosol is a kind of colloid in which :gas is dispersed in solidsolid is dispersed in gasliquid is dispersed in watergas is dispersed in liquidCorrect Option: , 2 Solution: Aerosol is suspension of fine solid or liquid particles in air or other gas. Ex. Fog, dust, smoke etc $\therefore$ Ans. (2)...
Read More →The given plots represent the variation of the concentration
Question: The given plots represent the variation of the concentration of a reactant $\mathrm{R}$ with time for two different reactions (i) and (ii). The respective orders of the reactions are : 1,01,10,10,2Correct Option: 1 Solution:...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{CH}$$\mathrm{CH}_{3} \mathrm{CH}=\mathrm{C}=\mathrm{CH}_{2}$$\mathrm{CH}_{3} \mathrm{CH}=\mathrm{CHCH}_{2} \mathrm{NH}_{2}$Correct Option: 1 Solution:...
Read More →Chlorine on reaction with hot and concentrated sodium hydroxide gives:
Question: Chlorine on reaction with hot and concentrated sodium hydroxide gives:$\mathrm{Cl}^{-}$and $\mathrm{ClO}_{2}^{-}$$\mathrm{Cl}^{-}$and $\mathrm{ClO}_{3}^{-}$$\mathrm{Cl}^{-}$and $\mathrm{ClO}^{-}$$\mathrm{ClO}_{3}^{-}$and $\mathrm{ClO}_{2}^{-}$Correct Option: , 2 Solution: $3 \mathrm{Cl}_{2}+6 \mathrm{OH}^{-} \rightarrow 5 \mathrm{Cl}^{-}+\mathrm{ClO}_{3}^{-}+3 \mathrm{H}_{2} \mathrm{O}$...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: 1 Solution:...
Read More →The aldehydes which will not form Grignard product with one equivalent Grignard reagents are :
Question: The aldehydes which will not form Grignard product with one equivalent Grignard reagents are : $(\mathrm{B}),(\mathrm{C}),(\mathrm{D})$(B), (D)$(\mathrm{B}),(\mathrm{C})$$(\mathrm{C}),(\mathrm{D})$Correct Option: , 2 Solution: Acid-base reaction of G.R are fast....
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: , 4 Solution:...
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