The pair that contains two
Question: The pair that contains two $\mathrm{P}-\mathrm{H}$ bonds in each of the oxoacids is :$\mathrm{H}_{3} \mathrm{PO}_{2}$ and $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$$\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$ and $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}$$\mathrm{H}_{3} \mathrm{PO}_{3}$ and $\mathrm{H}_{3} \mathrm{PO}_{2}$$\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}$ and $\mathrm{H}_{3} \mathrm{PO}_{3}$Correct Option: 1, Solution: $\mathrm{H}_{3} \mathrm{PO}_{2}$ and $\mathr...
Read More →The metal that forms nitride by reacting directly
Question: The metal that forms nitride by reacting directly with $\mathrm{N}_{2}$ of air, is :$\mathrm{K}$$\mathrm{Cs}$$\mathrm{Li}$$\mathrm{Rb}$Correct Option: , 3 Solution: Only Li react directly with $\mathrm{N}_{2}$ out of alkali metals $6 \mathrm{Li}+\mathrm{N}_{2} \rightarrow 2 \mathrm{Li}_{3} \mathrm{~N}$...
Read More →The major product of the following recation is:
Question: The major product of the following recation is: Correct Option: , 3 Solution:...
Read More →The complex thai has highest cry splitting energy
Question: The complex thai has highest cry splitting energy $(\Delta)$, is :$\mathrm{K}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right] \mathrm{Cl}_{3}$$\mathrm{K}_{2}\left[\mathrm{CoCl}_{4}\right]$$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}_{2}$Correct Option: 1 Solution: As complex $\mathrm{K}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$ have $\mathrm{CN}^{-}$liga...
Read More →In the cell
Question: In the cell $\mathrm{Pt}(\mathrm{s}) \mid \mathrm{H}_{2}(\mathrm{~g}, 1$ bar $|\mathrm{HCl}(\mathrm{aq})| \mathrm{Ag}(\mathrm{s}) \mid \mathrm{Pt}(\mathrm{s})$ the cell potential is $0.92$ when a $10^{-6}$ molal $\mathrm{HCl}$ solution is used. THe standard electrode potential of $\left(\mathrm{AgCl} / \mathrm{Ag}, \mathrm{Cl}^{-}\right)$electrode is : $\left\{\right.$ given, $\left.\frac{2.303 \mathrm{RT}}{\mathrm{F}}=0.06 \mathrm{Vat} 298 \mathrm{~K}\right\}$$0.20 \mathrm{~V}$$0.76 \...
Read More →What will be the major product
Question: What will be the major product in the following mononitation reaction ? Correct Option: , 3 Solution:...
Read More →Sodium metal on dissolution in liquid ammonia gives
Question: Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:sodium ion-ammonia complexsodamidesodium-ammonia complexammoniated electronsCorrect Option: , 4 Solution: ammoniated electrons...
Read More →Among the following reactions of hydrogen with halogens,
Question: Among the following reactions of hydrogen with halogens, the one that requires a catalyst is :$\mathrm{H}_{2}+\mathrm{I}_{2} \rightarrow 2 \mathrm{HI}$$\mathrm{H}_{2}+\mathrm{F}_{2} \rightarrow 2 \mathrm{HF}$$\mathrm{H}_{2}+\mathrm{Cl}_{2} \rightarrow 2 \mathrm{HCI}$$\mathrm{H}_{2}+\mathrm{Br}_{2} \rightarrow 2 \mathrm{HBr}$Correct Option: 1 Solution: $\mathrm{H}_{2}+\mathrm{I}_{2} \rightarrow 2 \mathrm{HI}$...
Read More →The amount of sugar
Question: The amount of sugar $\left(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\right)$ required to prepare $2 \mathrm{~L}$ of its $0.1 \mathrm{M}$ aqueous solution is :$68.4 \mathrm{~g}$$17.1 \mathrm{~g}$$34.2 \mathrm{~g}136.8 \mathrm{~g}$Correct Option: 1 Solution:...
Read More →The number of 2 -centre-2-electron and 3 centre-2-electron
Question: The number of 2 -centre-2-electron and 3 centre-2-electron bonds in $\mathrm{B}_{2} \mathrm{H}_{6}$, respectively, are :2 and 42 and 12 and 24 and 2Correct Option: , 4 Solution: (4) 4 and 2...
Read More →ood reducing nature of
Question: lood reducing nature of $\mathrm{H}_{3} \mathrm{PO}_{2}$ ttributed to the presence of:One P-OH bondOne P-H bondTwo P-H bondsTwo P-OH bondsCorrect Option: , 3 Solution: $\mathrm{H}_{3} \mathrm{PO}_{2}$ is good reducing agent due to presence...
Read More →The 71st electron of an element X
Question: The $71^{\text {st }}$ electron of an element $X$ with an atomic number of 71 enters into the orbital :$4 \mathrm{f}$$6 p$$6 \mathrm{~s}$$5 \mathrm{~d}$Correct Option: 1 Solution: (1) 4f...
Read More →An ideal gas undergoes isothermal compression from
Question: An ideal gas undergoes isothermal compression from $5 \mathrm{~m}^{3}$ against a constant external pressure of $4 \mathrm{Nm}^{-2}$. Heat released in this process is used to increase the temperature of 1 mole of $\mathrm{Al}$. If molar heat capacity of $\mathrm{Al}$ is $24 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$, the temperature of $\mathrm{Al}$ increases by :$\frac{3}{2} \mathrm{~K}$$\frac{2}{3} \mathrm{~K}$$1 \mathrm{~K}$$2 \mathrm{~K}$Correct Option: , 2 Solution: Work done...
Read More →The isotopes of hydrogen are :
Question: The isotopes of hydrogen are : Tritium and protium onlyDeuterium and tritium onlyProtium and deuterum onlyProtium, deuterium and tritiumCorrect Option: , 4 Solution: Isotopes of hydrogen is : Proteium Deuterium Tritium...
Read More →Solve this following
Question: The compounds $A$ and $B$ in the following reaction are, respectively: $\mathrm{A}=$ Benzyl alcohol, $\mathrm{B}=$ Benzyl isocyanide$\mathrm{A}=$ Benzyl alcohol, $\mathrm{B}=$ Benzyl cyanide$\mathrm{A}=$ Benzyl chloride, $\mathrm{B}=$ Benzyl cyanide$\mathrm{A}=$ Benzyl chloride, $\mathrm{B}=$ Benzyl isocyanideCorrect Option: 4, Solution:...
Read More →A mixture of 100 m mol of Ca(OH)2 and 2g of
Question: A mixture of $100 \mathrm{~m} \mathrm{~mol}$ of $\mathrm{Ca}(\mathrm{OH})_{2}$ and $2 \mathrm{~g}$ of sodium sulphate was dissolved in water and the volume was made up to $100 \mathrm{~mL}$. The mass of calcium sulphate formed and the concentration of $\mathrm{OH}^{-}$in resulting solution, respectively, are : (Molar mass of $\mathrm{Ca}(\mathrm{OH})_{2}, \mathrm{Na}_{2} \mathrm{SO}_{4}$ and $\mathrm{CaSO}_{4}$ are 74,143 and $136 \mathrm{~g} \mathrm{~mol}^{-1}$, respectively; $\mathrm...
Read More →The ore that contains both iron and copper is:
Question: The ore that contains both iron and copper is: malachitedolomiteazuritecopper pyritesCorrect Option: , 4 Solution:...
Read More →The correct match between Item -I and ItemII is :
Question: The correct match between Item -I and ItemII is : $\mathrm{A} \rightarrow \mathrm{Q} ; \mathrm{B} \rightarrow \mathrm{P} ; \mathrm{C} \rightarrow \mathrm{S} ; \mathrm{D} \rightarrow \mathrm{R}$$\mathrm{A} \rightarrow \mathrm{R} ; \mathrm{B} \rightarrow \mathrm{P} ; \mathrm{C} \rightarrow \mathrm{S} ; \mathrm{D} \rightarrow \mathrm{Q}$$\mathrm{A} \rightarrow \mathrm{R} ; \mathrm{B} \rightarrow \mathrm{S} ; \mathrm{C} \rightarrow \mathrm{P} ; \mathrm{D} \rightarrow \mathrm{Q}$$\mathrm{A}...
Read More →The major product ' X ' formed in the
Question: The major product ' $X$ ' formed in the following reaction is : Correct Option: , 4 Solution: (4)...
Read More →Which hydrogen in compound (E)
Question: Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light : $\underset{\delta}{\mathrm{CH}_{3}}-\underset{\gamma}{\mathrm{C}_{2}}-\underset{\beta}{\mathrm{C}} \mathrm{H}=\underset{\alpha}{\mathrm{C}_{2}}$$\beta$ - hydrogen$\gamma$-hydrogen$\delta$ - hydrogen$\alpha$ - hydrogenCorrect Option: , 2 Solution: (2) $\gamma$-hydrogen...
Read More →The correct structure of product 'P'
Question: The correct structure of product 'P' in the following reaction is: Asn-Ser $+\underset{\text { (excess) }}{\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2}} \mathrm{O} \stackrel{\mathrm{NEt}_{3}}{\longrightarrow} \mathrm{P}$Correct Option: 1 Solution: Asn-Ser is dipeptide having following structure $\mathrm{Asn}-\mathrm{Ser}+\underset{\substack{\text { excess }}}{\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2}} \mathrm{O} \stackrel{\mathrm{NEt}_{3}}{\longrightarrow} \mathrm{P}$ $P$ is...
Read More →Solve this following
Question: Aluminium is usually found in $+3$ oxidation stagte. In contarast, thallium exists in $+1$ and $+3$ oxidation states. This is due to : lanthanoid contractionlattice effectdiagonal relationshipinert pair effectCorrect Option: , 4 Solution: Inert pair effect is promenent character of pblock element....
Read More →The major product formed in the reaction
Question: The major product formed in the reaction given below will be : Correct Option: , 2 Solution: (Bonus)...
Read More →The one that is extensively used as a piezoelectric material is :
Question: The one that is extensively used as a piezoelectric material is :QuartzAmorphous silicaMicaTridymiteCorrect Option: 1 Solution: Quartz (Information)...
Read More →The effect of lanthanoid contraction
Question: The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :decrease in both atomic and ionic radiiincrease in atomic radii and decrease in ionic radiiincrease in both atomic and ionic radiidecrease in atomic radii and increase in ionic radiiCorrect Option: 1 Solution: Due to Lanthanoid contraction both atomic radii and ionic radii decreases gradually in the lanthanoid series....
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