Prove the following
Question: $2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{SO}_{3}(\mathrm{~g})$ The above reaction is carried out in a vessel starting with partial pressure $\mathrm{P}_{\mathrm{SO}_{2}}=250 \mathrm{~m}$ bar, $\mathrm{P}_{\mathrm{O}_{2}}=750 \mathrm{~m}$ bar and $\mathrm{P}_{\mathrm{SO}_{3}}=0$ bar. When the reaction is complete, the total pressure in the reaction vessel is__________ $\mathrm{m}$ bar. (Round off of the nearest integer). Solution: $\therefore$ Fi...
Read More →Which one of the following metals
Question: Which one of the following metals forms interstitial hydride easily ?CrFeMnCoCorrect Option: 1 Solution: Elements of group $7,8,9$ do not form hydrides thus $\mathrm{Cr}$ will only form hydride among the given elements (Fe, Mn, Co)...
Read More →Solve this following
Question: The major products $A$ and $B$ formed in the following reaction sequence are : Correct Option: , 2 Solution:...
Read More →Identify the species having
Question: Identify the species having one $\pi$-bond and maximum number of canonical forms from the following:$\mathrm{SO}_{3}$$\mathrm{O}_{2}$$\mathrm{SO}_{2}$$\mathrm{CO}_{3}^{2-}$Correct Option: , 4 Solution: Among $\mathrm{SO}_{3}, \mathrm{O}_{2}, \mathrm{SO}_{2}$ and $\mathrm{CO}_{3}^{2-}$, only $\mathrm{O}_{2}$ and $\mathrm{CO}_{3}^{2-}$ has only one $\pi$-bond...
Read More →The spin-only magnetic moment value for the complex
Question: The spin-only magnetic moment value for the complex $\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{4-}$ is BM. [At. no. of $\mathrm{Co}=27]$ Solution: $\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{4-}$ $x+6 \times(-1)=-4$ $\mathrm{Co}^{2+}:[\mathrm{Ar}] 3 \mathrm{~d}^{7}$ and $\mathrm{CN}^{-}$is a strong field ligand which can pair electron of central atom. It has one unpaired electron (n) in 4d-subshell. So spin only magnetic moment $(\mu)=$ $\sqrt{\mathrm{n}(\mathrm{n}+2)}$ B.M where $\ma...
Read More →Which one of the following
Question: Which one of the following is correct structure for cytosine ?Correct Option: , 3 Solution: The correct structure of cytosine...
Read More →The spin only magnetic moments
Question: The spin only magnetic moments (in BM) for free $\mathrm{Ti}^{3+}, \mathrm{V}^{2+}$ and $\mathrm{Sc}^{3+}$ ions respectively are (At.No. Sc : 21, Ti : 22, V : 23)$3.87,1.73,0$$1.73,3.87,0$$1.73,0,3.87$$0,3.87,1.73$Correct Option: , 2 Solution: $\mu=\sqrt{\mathrm{n}(\mathrm{n}+2)} \mathrm{BM}$...
Read More →A reaction of benzonitrile
Question: A reaction of benzonitrile with one equivalent $\mathrm{CH}_{3} \mathrm{MgBr}$ followed by hydrolysis produces a yellow liquid "P". The compound "P" will give positive ___________.Iodoform testSchiff's testNinhydrin's testTollen's testCorrect Option: 1 Solution:...
Read More →The correct order of ionic radii for the ions,
Question: The correct order of ionic radii for the ions, $\mathrm{P}^{3-}, \mathrm{S}^{2-}$, $\mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{Cl}^{-}$is :$\mathrm{P}^{3-}\mathrm{S}^{2-}\mathrm{Cl}^{-}\mathrm{K}^{+}\mathrm{Ca}^{2+}$$\mathrm{Cl}^{-}\mathrm{S}^{2-}\mathrm{P}^{3-}\mathrm{Ca}^{2+}\mathrm{K}^{+}$$\mathrm{P}^{3-}\mathrm{S}^{2-}\mathrm{Cl}^{-}\mathrm{Ca}^{2+}\mathrm{K}^{+}$$\mathrm{K}^{+}\mathrm{Ca}^{2+}\mathrm{P}^{3-}\mathrm{S}^{2-}\mathrm{Cl}^{-}$Correct Option: 1 Solution: $\mathrm{P}^{3-}...
Read More →Match List-I with List-II
Question: Match List-I with List-II of electrolyte Choose the most appropriate answer from the options given below : (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)(a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)Correct Option: 1 Solution: Cell constant $=\left(\frac{\ell}{\mathrm{A}}\right) \Rightarrow$ Units $=\mathrm{m}^{-1}$ Molar conductivity $\left(\Lambda_{\mathrm{m}}\right) \Rightarrow$ Units $=\mathrm{Sm}^{2} \mathrm{~mole}^{-1}$ ...
Read More →Solve this
Question: Consider the above reaction, the Product " $P^{\prime \prime}$ is :Correct Option: , 2 Solution:...
Read More →When 400ml of 0.2M H2SO4 solution is
Question: When $400 \mathrm{~mL}$ of $0.2 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}$ solution is mixed with $600 \mathrm{~mL}$ of $0.1 \mathrm{M} \mathrm{NaOH}$ solution, the increase in temperature of the final solution is_______ $\times 10^{-2} \mathrm{~K}$. (Round off to the nearest integer). $\left[\mathrm{Use}: \mathrm{H}^{+}(\mathrm{aq})+\mathrm{OH}^{-}(\mathrm{aq}) \rightarrow \mathrm{H}_{2} \mathrm{O}:\right.$ $\left.\Delta_{\gamma} \mathrm{H}=-57.1 \mathrm{~kJ} \mathrm{~mol}^{-1}\right]...
Read More →The correct decreasing
Question: The correct decreasing order of densities of the following compounds is : $(\mathrm{D})(\mathrm{C})(\mathrm{B})(\mathrm{A})$$(\mathrm{C})(\mathrm{D})(\mathrm{A})(\mathrm{B})$$(C)(B)(A)(D)$$(\mathrm{A})(\mathrm{B})(\mathrm{C})(\mathrm{D})$Correct Option: 1 Solution: The density order...
Read More →Which one of the following reactions will not yield propionic acid?
Question: Which one of the following reactions will not yield propionic acid?$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COCH}_{3}+\mathrm{OI}^{-} / \mathrm{H}_{3} \mathrm{O}^{+}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{3}+\mathrm{KMnO}_{4}$ (Heat), $\mathrm{OH}^{-} / \mathrm{H}_{3} \mathrm{O}^{+}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CCl}_{3}+\mathrm{OH}^{-} / \mathrm{H}_{3} \mathrm{O}^{+}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}+\mathrm{Mg}, \mathrm{CO}_{2}$ dry ether ...
Read More →In which one of the following sets all species show disproportionation reaction?
Question: In which one of the following sets all species show disproportionation reaction?$\mathrm{ClO}_{2}^{-}, \mathrm{F}_{2}, \mathrm{MnO}_{4}^{-}$and $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}$$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}, \mathrm{MnO}_{4}^{-}, \mathrm{ClO}_{2}^{-}$and $\mathrm{Cl}_{2}$$\mathrm{MnO}_{4}^{-}, \mathrm{ClO}_{2}^{-}, \mathrm{Cl}_{2}$ and $\mathrm{Mn}^{3+}$$\mathrm{ClO}_{4}^{-}, \mathrm{MnO}_{4}^{-}, \mathrm{ClO}_{2}^{-}$and $\mathrm{F}_{2}$Correct Option: , 3 Solution: No opti...
Read More →The Azimuthal quantum number for the valence
Question: The Azimuthal quantum number for the valence electrons of $\mathrm{Ga}^{+}$ion is_________. (Atomic number of Ga $=31$ ) Solution: $\mathrm{Ga}^{+}: \mathrm{Is}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}^{6} 3 \mathrm{~s}^{2} 3 \mathrm{p}^{6} 3 \mathrm{~d}^{10} 4 \mathrm{~s}^{2}$ The azimuthal quantum number for the valence electrons (4s-subshell) of Ga+ ion is zero $(0)$....
Read More →The ionic radii of
Question: The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is :It is smaller than $\mathrm{F}^{-}$and $\mathrm{N}$It is bigger than $\mathrm{O}^{2-}$ and $\mathrm{F}$It is bigger than $\mathrm{F}^{-}$and $\mathrm{N}$, but smaller than of $\mathrm{O}^{2-}$It is smaller than $\mathrm{O}^{2-}$ and $\mathrm{F}^{-}$, but bigger than of $\mathrm{N}$Correct Option: , 2 Solution: $\mathrm{F}^{-}, \mathrm{O}^{2-}$ and $\mathrm{N}^{3-}$ all are isoelectronic species in wh...
Read More →The oxide that gives
Question: The oxide that gives $\mathrm{H}_{2} \mathrm{O}_{2}$ most readily o treatment with $\mathrm{H}_{2} \mathrm{O}$ is :$\mathrm{PbO}_{2}$$\mathrm{Na}_{2} \mathrm{O}_{2}$$\mathrm{SnO}_{2}$$\mathrm{BaO}_{2} \cdot 8 \mathrm{H}_{2} \mathrm{O}$Correct Option: Solution: 1. $\mathrm{PbO}_{2}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{Pb}(\mathrm{OH})_{4}$ 2. $\mathrm{Na}_{2} \mathrm{O}_{2}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{NaOH}+\mathrm{H}_{2} \mathrm{O}_{2}$ this reaction is...
Read More →Solve this following
Question: The structures of $\mathbf{A}$ and $\mathbf{B}$ formed in the following reaction are: $\left[\mathrm{Ph}=-\mathrm{C}_{6} \mathrm{H}_{5}\right]$ Correct Option: 1 Solution:...
Read More →Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and pain?
Question: Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and pain?Correct Option: , 2 Solution: Histamine stimulate the secretion of HCl Histamine structure...
Read More →The equilibrium constant for the reaction
Question: The equilibrium constant for the reaction is $\mathrm{K}_{\mathrm{p}}=4$. At equilibrium, the partial pressure of $\mathrm{O}_{2}$ is______ atm. (Round off to the nearest integer) Solution: $\mathrm{k}_{\mathrm{p}}=\mathrm{Po}_{2}^{1 / 2}=4$ $\therefore \mathrm{Po}_{2}=16 \mathrm{bar}=16 \mathrm{~atm}$...
Read More →Match List I with List II :
Question: Match List I with List II : (Both having metallurgical terms) Choose the correct answer from the options given below :(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)Correct Option: 1 Solution: (a) Concentration of Ag is performed by leaching with dilute $\mathrm{NaCN}$ solution (b) Pig iron is formed in blast furnace (c) Blister $\mathrm{Cu}$ is produced in Bessemer converter (d) Fr...
Read More →250 mL of 0.5 M NaOH was added
Question: $250 \mathrm{~mL}$ of $0.5 \mathrm{M} \mathrm{NaOH}$ was added to $500 \mathrm{~mL}$ of $1 \mathrm{M}$ $\mathrm{HCl}$. The number of unreacted $\mathrm{HCl}$ molecules in the solution after complete reaction is $\times 10^{21}$. (Nearest integer) $\left(\mathrm{N}_{\mathrm{A}}=6.022 \times 10^{23}\right)$ Solution: We known that no. of moles $=\mathrm{V}_{\text {litre }} \times$ Molarity \ No. of millimoles $=\mathrm{V}_{\mathrm{ml}} \times$ Molarity so millimoles of $\mathrm{NaOH}=250...
Read More →The addition of silica during the extraction
Question: The addition of silica during the extraction of copper from its sulphide ore :-converts copper sulphide into copper silicateconverts iron oxide into iron silicatereduces copper sulphide into metallic copperreduces the melting point of the reaction mixtureCorrect Option: , 2 Solution: Silica is used to remove FeO impurity from the ore of copper...
Read More →Which one of the following metal
Question: Which one of the following metal complexes is most stable?$\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{Cl}_{2}$$\left[\mathrm{Co}(\mathrm{en})_{3}\right] \mathrm{Cl}_{2}$$\left[\mathrm{Co}(\mathrm{en})_{2}\left(\mathrm{NH}_{3}\right)_{2}\right] \mathrm{Cl}_{2}$$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{2}$Correct Option: , 2 Solution: Complex $\left[\mathrm{Co}(\mathrm{en})_{3}\right] \mathrm{Cl}_{2}$ is most stable complex ...
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