The compound of Xenon with zero dipole moment is :-
Question: The compound of Xenon with zero dipole moment is :-$\mathrm{XeO}_{3}$$\mathrm{XeO}_{2}$$\mathrm{XeF}_{4}$$\mathrm{XeOF}_{4}$Correct Option: , 3 Solution: Solution not required...
Read More →The number and type of bonds in
Question: The number and type of bonds in $\mathrm{C}_{2}^{2-}$ ion in $\mathrm{CaC}_{2}$ are :Two $\sigma$ bonds and one $\pi$ - bondTwo $\sigma$ bonds and two $\pi$ - bondsOne $\sigma$ bond and two $\pi$ - bondsOne $\sigma$ bond and one $\pi-$ bondCorrect Option: , 3 Solution:...
Read More →Solve this following
Question: The number of $\mathrm{S}-\mathrm{S}$ bonds in $\mathrm{SO}_{3}, \mathrm{~S}_{2} \mathrm{O}_{3}{ }^{2-}, \mathrm{S}_{2} \mathrm{O}_{6}{ }^{2-}$ and $\mathrm{S}_{2} \mathrm{O}_{8}{ }^{2-}$ respectively are :-$1,0,1,0$$0,1,1,0$$1,0,0,1$$0,1,0,1$Correct Option: , 2 Solution:...
Read More →Hydrogen peroxide acts both as an oxidising and as a reducing agent
Question: Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases $\mathrm{H}_{2} \mathrm{O}_{2}$ acts as a reducing agent in acid medium ?$\mathrm{MnO}_{4}^{-}$$\mathrm{SO}_{3}^{2-}$KI$\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}$Correct Option: 1 Solution:...
Read More →Shapes of certain
Question: Shapes of certain interhalogen compounds are stated below. Which one of them is not correctly stated?$\mathrm{IF}_{7}$ : Pentagonal bipyramid$\mathrm{BrF}_{5}$ : Trigonal bipyramid$\mathrm{ICl}_{3}$ : Planar dimeric$\mathrm{BrF}_{3}$ : Planar T-shapedCorrect Option: , 2 Solution: Solution not required...
Read More →In the following sets of reactants which two sets best exhibit the amphoteric character of
Question: In the following sets of reactants which two sets best exhibit the amphoteric character of $\mathrm{Al}_{2} \mathrm{O}_{3} \cdot \mathrm{xH}_{2} \mathrm{O}$ ? 1 and 22 and 41 and 33 and 4Correct Option: , 3 Solution:...
Read More →Solve this following
Question: In view of the signs of $\Delta_{r} G^{\circ}$ for the following reactions $\mathrm{PbO}_{2}+\mathrm{Pb} \rightarrow 2 \mathrm{PbO}, \Delta_{\mathrm{r}} \mathrm{G}^{\circ}0$ $\mathrm{SnO}_{2}+\mathrm{Sn} \rightarrow 2 \mathrm{SnO}, \Delta_{\mathrm{r}} \mathrm{G}^{\circ}0$ Which oxidation states are more characteristic for lead and tin ?For lead $+4$, for tin $+2$For lead $+2$, for tin $+2$For lead $+4$, for tin $+4$For lead $+2$, for tin $+4$Correct Option: , 4 Solution: Solution not r...
Read More →The gas evolved on heating
Question: The gas evolved on heating $\mathrm{CaF}_{2}$ and $\mathrm{SiO}_{2}$ with concentrated $\mathrm{H}_{2} \mathrm{SO}_{4}$, on hydrolysis gives a white gelatinous precipitate. The precipitate is:silica gelsilicic acidhydrofluosilicic acidcalciumfluorosilicateCorrect Option: , 2 Solution:...
Read More →Which of the following xenon-OXO compounds may not be obtained
Question: Which of the following xenon-OXO compounds may not be obtained by hydrolysis of xenon fluorides ?$\mathrm{XeO}_{2} \mathrm{~F}_{2}$$\mathrm{XeO}_{3}$$\mathrm{XeO}_{4}$$\mathrm{XeOF}_{4}$Correct Option: , 3 Solution:...
Read More →The catenation tendency
Question: The catenation tendency of $\mathrm{C}, \mathrm{Si}$ and $\mathrm{Ge}$ is in the order $\mathrm{Ge}\mathrm{Si}\mathrm{C}$. The bond energies (in $\mathrm{kJ} \mathrm{mol}^{-1}$ ) of $\mathrm{C}-\mathrm{C}, \mathrm{Si}-\mathrm{Si}$ and $\mathrm{Ge}-\mathrm{Ge}$ bonds are respectively :$348,260,297$$348,297,260$$297,348,260$$260,297,348$Correct Option: , 2 Solution:...
Read More →The compound that does not produce nitrogen gas by the thermal decomposition is
Question: The compound that does not produce nitrogen gas by the thermal decomposition is$\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$$\mathrm{NH}_{4} \mathrm{NO}_{2}$$\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4}$$\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2}$Correct Option: , 3 Solution:...
Read More →Which of the following statements about the depletion
Question: Which of the following statements about the depletion of ozone layer is correct?The problem of ozone depletion is more serious at poles because ice crystals in the clouds over poles act as catalyst for photochemical reactions involving the decomposition of ozone by Cl and ClO radicalsThe problem of ozone depletion is less serious at poles because $\mathrm{NO}_{2}$ solidifies and is not available for consuming $\mathrm{ClO}^{*}$ radicalsOxides of nitrogen also do not react with ozone in...
Read More →Which of the following are Lewis acids ?
Question: Which of the following are Lewis acids ?$\mathrm{AlCl}_{3}$ and $\mathrm{SiCl}_{4}$$\mathrm{PH}_{3}$ and $\mathrm{SiCl}_{4}$$\mathrm{BCl}_{3}$ and $\mathrm{AlCl}_{3}$$\mathrm{PH}_{3}$ and $\mathrm{BCl}_{3}$Correct Option: , 3 Solution:...
Read More →Which of the following are Lewis acids ?
Question: Which of the following are Lewis acids ?$\mathrm{AlCl}_{3}$ and $\mathrm{SiCl}_{4}$$\mathrm{PH}_{3}$ and $\mathrm{SiCl}_{4}$$\mathrm{BCl}_{3}$ and $\mathrm{AlCl}_{3}$$\mathrm{PH}_{3}$ and $\mathrm{BCl}_{3}$Correct Option: Solution:...
Read More →Which has trigonal bipyramidal shape ?
Question: Which has trigonal bipyramidal shape ?$\mathrm{XeOF}_{4}$$\mathrm{XeO}_{3}$$\mathrm{XeO}_{3} \mathrm{~F}_{2}$$\mathrm{XeOF}_{2}$Correct Option: , 3 Solution:...
Read More →From the following statements regarding
Question: From the following statements regarding $\mathrm{H}_{2} \mathrm{O}_{2}$, choose the incorrect statement :It has to be stored in plastic or wax lined glass bottles in darkIt has to be kept away from dustIt can act only as an oxidizing agentIt decomposes on exposure to lightCorrect Option: , 3 Solution:...
Read More →Which of the following series correctly represents relations between the elements from
Question: Which of the following series correctly represents relations between the elements from X to Y? $\mathrm{X} \rightarrow \mathrm{Y}$${ }_{18} \mathrm{Ar} \rightarrow{ }_{54} \mathrm{Xe}$ Noble character increases${ }_{3} \mathrm{Li} \rightarrow{ }_{19} \mathrm{~K} \quad$ Ionization enthalpy increases${ }_{6} \mathrm{C} \rightarrow{ }_{32} \mathrm{Ge}$ Atomic radii increases${ }_{9} \mathrm{~F} \rightarrow{ }_{35} \mathrm{Br}$ Electron gain enthalpy with negative sign increasesCorrect Opt...
Read More →From the following statements regarding
Question: From the following statements regarding $\mathrm{H}_{2} \mathrm{O}_{2}$, choose the incorrect statement :It has to be stored in plastic or wax lined glass bottles in darkIt has to be kept away from dustIt can act only as an oxidizing agentIt decomposes on exposure to lightCorrect Option: , 3 Solution:...
Read More →Boron cannot form which one of the following anions?
Question: Boron cannot form which one of the following anions?$\mathrm{B}(\mathrm{OH})_{4}^{-}$$\mathrm{BO}_{2}^{-}$$\mathrm{BF}_{6}^{3-}$$\mathrm{BH}_{4}^{-}$Correct Option: , 3 Solution:...
Read More →Which one has the highest boiling point ?
Question: Which one has the highest boiling point ?KrXeHeNeCorrect Option: , 2 Solution: Boiling point order: $\mathrm{He}\mathrm{Ne}\mathrm{Ar}\mathrm{Kr}\mathrm{Xe}$...
Read More →The shape of
Question: The shape of $\mathrm{IF}_{6}^{-}$is :Trigonally distorted octahedronPyramidalOctahedralSquare antiprismCorrect Option: 1 Solution:...
Read More →Which of the following statements regarding sulphur is incorrect?
Question: Which of the following statements regarding sulphur is incorrect?At $600^{\circ} \mathrm{C}$ the gas mainly consists of $\mathrm{S}_{2}$ molceulesThe oxidation state of sulphur is never less than $+4$ in its compounds$\mathrm{S}_{2}$ molecule is paramagneticThe vapour at $200^{\circ} \mathrm{C}$ consists mostly of $\mathrm{S}_{8}$ ringsCorrect Option: 2, Solution:...
Read More →Which among the following is the most reactive ?
Question: Which among the following is the most reactive ?$\mathbf{I}_{2}$$\mathrm{ICl}$$\mathrm{Cl}_{2}$$\mathrm{Br}_{2}$Correct Option: , 2 Solution: Inter halogen compounds are more reactive than halogen except $\mathrm{F}_{2}$....
Read More →Solve this
Question: $\mathrm{XeO}_{4}$ molecule is tetrahedral having :Two $p \pi-d \pi$ bondsFour $\mathrm{p} \pi-\mathrm{d} \pi$ bondsOne $p \pi-d \pi$ bondThree $p \pi-d \pi$ bondsCorrect Option: , 2 Solution:...
Read More →Which of the following statement is wrong ?
Question: Which of the following statement is wrong ? Single $N-N$ bond is weaker than the single $P-P$ bond$\mathrm{N}_{2} \mathrm{O}_{4}$ has two resonance structuresThe stability of hydrides increases from $\mathrm{NH}_{3}$ to $\mathrm{BiH}_{3}$ in group 15 of the periodic tableNitrogen cannot form $\mathrm{d} \pi$-p $\pi$ bondCorrect Option: , 3 Solution:...
Read More →