The correct structure of histidine in a strongly acidic solution
Question: The correct structure of histidine in a strongly acidic solution $(\mathrm{pH}=2)$ is Correct Option: 1 Solution: Histidine is Zwitter ionic form pIn $=7.59$...
Read More →The percentage composition of carbon
Question: The percentage composition of carbon by mole in methane is :$80 \%$$25 \%$$75 \%$$20 \%$Correct Option: , 4 Solution: $\mathrm{CH}_{4}$ $=20 \%$...
Read More →The magnetic moment of an octahedral homoleptic
Question: The magnetic moment of an octahedral homoleptic $\mathrm{Mn}$ (II) complex is $5.9 \mathrm{BM}$. The suitable ligand for this complex is : $\mathrm{CN}^{-}$$\mathrm{NCS}^{-}$$\mathrm{CO}$ethylenediamineCorrect Option: , 2 Solution:...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: , 4 Solution:...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: Correct Option: , 4 Solution:...
Read More →The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are :
Question: The correct statement(s) among I to III with respect to potassium ions that are abundant within the cell fluids is/are : I. They activate many enzymes II. They participate in the oxidation of glucose to produce ATP III. Along with sodium ions, they are responsible for the transmission of nerve signalsI, II and IIII and III onlyIII onlyI and II onlyCorrect Option: 1 Solution: All the three statements are correct a/c to NCERT (s-block)...
Read More →Solve this following
Question: $8 \mathrm{~g}$ of $\mathrm{NaOH}$ is dissolved in $18 \mathrm{~g}$ of $\mathrm{H}_{2} \mathrm{O}$. Mole fraction of $\mathrm{NaOH}$ in solution and molality (in $\mathrm{mol} \mathrm{kg}-1$ ) of the solutions respectively are :$0.167,11.11$$0.2,22.20$$0.2,11.11$$0.167,22.20$Correct Option: 1 Solution:...
Read More →The structure of Nylon-6 is :
Question: The structure of Nylon-6 is :Correct Option: , 3 Solution:...
Read More →The ion that has
Question: The ion that has $s p^{3} \mathrm{~d}^{2}$ hybridization for the central atom, is :$\left[\mathrm{ICI}_{2}\right]^{-}$$\left[\mathrm{IF}_{6}\right]^{-}$$\left[\mathrm{ICI}_{4}\right]^{-}$$\left[\mathrm{BrF}_{2}\right]^{-}$Correct Option: , 3 Solution:...
Read More →For the following reactions,
Question: For the following reactions, equilibrium constants are given : $\mathrm{S}(\mathrm{s})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons \mathrm{SO}_{2}(\mathrm{~g}) ; \mathrm{K}_{1}=10^{52}$ $2 \mathrm{~S}(\mathrm{~s})+3 \mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{3}(\mathrm{~g}) ; \mathrm{K}_{2}=10^{129}$ The equilibrium constant for the reaction, $2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{3}(\mathrm{~g})$ is :$10^{181...
Read More →A metal on combustion in excess air forms
Question: A metal on combustion in excess air forms X, $\mathrm{X}$ upon hydrolysis with water yields $\mathrm{H}_{2} \mathrm{O}_{2}$ and $\mathrm{O}_{2}$ along with another product. The metal is :$\mathrm{Rb}$$\mathrm{Na}$$\mathrm{Mg}$LiCorrect Option: 1 Solution:...
Read More →The major product in the following reaction is :
Question: The major product in the following reaction is : Correct Option: , 2 Solution: because one double bond is missing in all given option. So aromaticity is lost in both the ring....
Read More →Solve this following
Question: $50 \mathrm{~mL}$ of $0.5 \mathrm{M}$ oxalic acid is needed to neutralize $25 \mathrm{~mL}$ of sodium hydroxide solution. The amount of $\mathrm{NaOH}$ in $50 \mathrm{~mL}$ of the given sodium hydroxide solution is :$40 \mathrm{~g}$$20 \mathrm{~g}$$80 \mathrm{~g}$$10 \mathrm{~g}$Correct Option: Solution:...
Read More →In the following reaction
Question: In the following reaction $\mathrm{HCHO}$ and $\mathrm{MeOH}$$\mathrm{HCHO}$ and $\mathrm{tBuOH}^{2}$$\mathrm{CH}_{3} \mathrm{CHO}$ and $\mathrm{MeOH}$$\mathrm{CH}_{3} \mathrm{CHO}$ and ${ }^{t} \mathrm{BuOH}$Correct Option: Solution:...
Read More →Calculate the standard cell potential in(V)
Question: Calculate the standard cell potential in(V) of the cell in which following reaction takes place : $\mathrm{Fe}^{2+}(\mathrm{aq})+\mathrm{Ag}^{+}(\mathrm{aq}) \rightarrow \mathrm{Fe}^{3+}(\mathrm{aq})+\mathrm{Ag}(\mathrm{s})$ Given that $\mathrm{E}_{\mathrm{Ag}^{+} / \mathrm{Ag}}^{\mathrm{o}}=\mathrm{xV}$ $\mathrm{E}_{\mathrm{Fe}^{2+} / \mathrm{Fe}}^{\mathrm{o}}=\mathrm{yV}$ $\mathrm{E}_{\mathrm{Fe}^{3+} / \mathrm{Fe}}^{0}=\mathrm{ZV}$$x+2 y-3 z$$x-z$$x-y$$x+y-z$Correct Option: 1 Soluti...
Read More →The pair of metal ions that can give a spinonly magnetic moment of
Question: The pair of metal ions that can give a spinonly magnetic moment of $3.9 \mathrm{BM}$ for the complex $\left[\mathrm{M}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}$, is :$\mathrm{Cr}^{2+}$ and $\mathrm{Mn}^{2+}$$\mathrm{V}^{2+}$ and $\mathrm{Co}^{2+}$$\mathrm{V}^{2+}$ and $\mathrm{Fe}^{2+}$$\mathrm{Co}^{2+}$ and $\mathrm{Fe}^{2+}$Correct Option: , 2 Solution:...
Read More →The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is :
Question: The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is : $(B)(A)(D)(C)$$(B)(A)(C)(D)$$(\mathrm{A})(\mathrm{C})(\mathrm{D})(\mathrm{B})$$(\mathrm{A})(\mathrm{B})(\mathrm{C})(\mathrm{D})$Correct Option: , 2 Solution: Nucleophilicity order...
Read More →Solve this following
Question: $\mathrm{Mn}_{2}(\mathrm{CO})_{10}$ is an organometallic compound due to the presence of :$\mathrm{Mn}-\mathrm{Mn}$ bond$\mathrm{Mn}-\mathrm{C}$ bond$\mathrm{Mn}-\mathrm{O}$ bond$\mathrm{C}-\mathrm{O}$ bondCorrect Option: , 2 Solution: Compounds having at least one bond between carbon and metal are known as organometallic compounds....
Read More →The correct order for acid strength of compounds
Question: The correct order for acid strength of compounds $\mathrm{CH} \equiv \mathrm{CH}, \mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH}$ and $\mathrm{CH}_{2}=\mathrm{CH}_{2}$ is as follows :$\mathrm{CH} \equiv \mathrm{CH}\mathrm{CH}_{2}=\mathrm{CH}_{2}\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH}$$\mathrm{HC} \equiv \mathrm{CH}\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH}\mathrm{CH}_{2}=\mathrm{CH}_{2}$$\mathrm{CH}_{3}-\mathrm{C} \equiv \mathrm{CH}\mathrm{CH}_{2}=\mathrm{CH}_{2}\mathrm{HC} \eq...
Read More →The hardness of a water sample
Question: The hardness of a water sample (in terms of equivalents of $\left.\mathrm{CaCO}_{3}\right)$ containing $10^{-3} \mathrm{M} \mathrm{CaSO}_{4}$ is: $\left(\right.$ molar mass of $\left.\mathrm{CaSO}_{4}=136 \mathrm{~g} \mathrm{~mol}^{-1}\right)$$100 \mathrm{ppm}$$50 \mathrm{ppm}$$10 \mathrm{ppm}$$90 \mathrm{ppm}$Correct Option: 1 Solution: ppm of $\mathrm{CaCO}_{3}$ $\left(10^{-3} \times 10^{3}\right) \times 100=100 \mathrm{ppm}$...
Read More →The metal d-orbitals that are directly facing the ligands in
Question: The metal d-orbitals that are directly facing the ligands in $\mathrm{K}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$ are :$\mathrm{d}_{\mathrm{xz}}, \mathrm{d}_{\mathrm{yz}}$ and $\mathrm{d}_{\mathrm{z}^{2}}$$d_{x y}, d_{x z}$ and $d_{y z}$$\mathrm{d}_{x y}$ and $\mathrm{d}_{x^{2}-y^{2}}$$\mathrm{d}_{\mathrm{x}^{2}-\mathrm{y}^{2}}$ and $\mathrm{d}_{\mathrm{z}^{2}}$Correct Option: , 4 Solution: $\mathrm{K}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$ $\mathrm{Co}^{+3} \rightarrow[\ma...
Read More →For the equilibrium,
Question: For the equilibrium, $2 \mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H}_{3} \mathrm{O}^{+}+\mathrm{OH}^{-}$, the value of $\Delta \mathrm{G}^{\circ}$ at 298 $\mathrm{K}$ is approximately :-$-80 \mathrm{~kJ} \mathrm{~mol}^{-1}$$-100 \mathrm{~kJ} \mathrm{~mol}^{-1}$$100 \mathrm{~kJ} \mathrm{~mol}^{-1}$$80 \mathrm{~kJ} \mathrm{~mol}^{-1}$Correct Option: , 4 Solution:...
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 →Among the following compounds most basic amino acid is :
Question: Among the following compounds most basic amino acid is :LysineAsparagineSerineHistidineCorrect Option: , 4 Solution: Histidine...
Read More →The major product obtained in the following reaction is :-
Question: The major product obtained in the following reaction is :- Correct Option: , 2 Solution:...
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