The main product of the following reaction is

Question: The main product of the following reaction is $\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{CH}_{2} \mathrm{CH}(\mathrm{OH}) \mathrm{CH}\left(\mathrm{CH}_{3}\right)_{2} \stackrel{\text { Conc. } \mathrm{H}_{3} \mathrm{SO}_{4}}{\longrightarrow} ?$Correct Option: , 2 Solution:...

The element with which of the following outer electron configuration may exhibit the

Question: The element with which of the following outer electron configuration may exhibit the largest number of oxidation states in its compounds :$3 \mathrm{~d}^{7} 4 \mathrm{~s}^{2}$$3 \mathrm{~d}^{8} 4 \mathrm{~s}^{2}$$3 \mathrm{~d}^{5} 4 \mathrm{~s}^{2}$$3 \mathrm{~d}^{6} 4 \mathrm{~S}^{2}$Correct Option: Solution: $\mathrm{Mn} \longrightarrow \mathrm{Mn}^{+7}$...

If sodium sulphate is considered to be completely dissociated into cations

Question: If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water $\left(\Delta \mathrm{T}_{\mathrm{f}}\right)$, when $0.01 \mathrm{~mol}$ of sodium sulphate isdissolved in $1 \mathrm{~kg}$ of water, is $\left(\mathrm{K}_{\mathrm{f}}=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$ :- 0.0186 K0.0372 K0.0558 K0.0744 KCorrect Option: , 3 Solution:...

If sodium sulphate is considered to be completely dissociated into cations

Question: If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water $\left(\Delta \mathrm{T}_{\mathrm{f}}\right)$, when $0.01 \mathrm{~mol}$ of sodium sulphate isdissolved in $1 \mathrm{~kg}$ of water, is $\left(\mathrm{K}_{\mathrm{f}}=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$ :- 0.0186 K0.0372 K0.0558 K0.0744 KCorrect Option: Solution:...

On mixing, heptane and octane form an ideal solution.

Question: On mixing, heptane and octane form an ideal solution. At $373 \mathrm{~K}$, the vapour pressures of the two liquid components (heptane and octane) are $105 \mathrm{kPa}$ and $45 \mathrm{kPa}$ respectively. Vapour pressure of the solution obtained by mixing $25.0$ of heptane and $35 \mathrm{~g}$ of octane will be (molar mass of heptane $=100 \mathrm{~g} \mathrm{~mol}^{-1}$ and of octane $=114 \mathrm{~g} \mathrm{~mol}^{-1}$ ) :-144.5 kPa72.0 kPa36.1 kPa96.2 kPaCorrect Option: , 2 Soluti...

The major product formed

Question: The major product formed in the following reaction is : Correct Option: , 3 Solution:...

Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride,

Question: Potassium dichromate when heated with concentrated sulphuric acid and a soluble chloride, gives brown - red vapours of$\mathrm{CrO}_{3}$$\mathrm{Cr}_{2} \mathrm{O}_{3}$$\mathrm{CrCl}_{3}$$\mathrm{CrO}_{2} \mathrm{Cl}_{2}$Correct Option: Solution: $\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+6 \mathrm{H}_{2} \mathrm{SO}_{4}+4 \mathrm{NaCl} \longrightarrow 2 \mathrm{KHSO}_{4}+4 \mathrm{NaHSO}_{4}+2 \mathrm{CrO}_{2} \mathrm{Cl}_{2}+3 \mathrm{H}_{2} \mathrm{O}$...

Question: Two liquids X and Y form an ideal solution. At 300K, vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mmHg) of X and Y in their pure states will be, respectively :-400 and 600500 and 600200 and 300300 and 400Correct Option: 1 Solution:...

The major product of the following reaction is :

Question: The major product of the following reaction is : Correct Option: 1 Solution:...

A binary liquid solution is prepared by mixing n-heptane and ethanol.

Question: A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the folloowing statements is correct regarding the behaviour of the solution ?The solution is non-ideal, showing ve deviation from Raoult's lawn-heptane shows +ve deviation while ethanol shows ve deviation from Raoult's lawThe solution formed is an ideal solution.The solutionis non-ideal, showing +ve deviation from Raoult's lawCorrect Option: , 4 Solution:...

Consider the following bromides :-

Question: Consider the following bromides :- The correct order of $S_{N}^{1}$ reactivity is$ABC$$BCA$$BAC$$CBA$Correct Option: , 2 Solution: Solution not required...

Which of the following arrangements does not represent the correct order of the property stated against it ?

Question: Which of the following arrangements does not represent the correct order of the property stated against it ? $\mathrm{V}^{2+}\mathrm{Cr}^{2+}\mathrm{Mn}^{2}\mathrm{Fe}^{2+}$ : paramagnetic behaviour$\mathrm{Ni}^{2+}\mathrm{Co}^{2+}\mathrm{Fe}^{2+}\mathrm{Mn}^{2+}$ : ionic size$\mathrm{Co}^{3+}\mathrm{Fe}^{3+}\mathrm{Cr}^{3+}\mathrm{Sc}^{3+}:$ stability in aqueous solution$\mathrm{Sc}\mathrm{Ti}\mathrm{Cr}\mathrm{Mn}:$ number of oxidation statesCorrect Option: 1 Solution: Solution Not R...

Which of the following on heating

Question: Which of the following on heating with aqueous $\mathrm{KOH}$, produces acetaldehyde ?$\mathrm{CH}_{2} \mathrm{ClCH}_{2} \mathrm{Cl}$$\mathrm{CH}_{3} \mathrm{CHCl}_{2}$$\mathrm{CH}_{3} \mathrm{COCl}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}$Correct Option: , 2 Solution: Solution not required...

The number of unpaired electrons in Gadolinium

Question: The number of unpaired electrons in Gadolinium [Z = 64] is :-2683Correct Option: , 3 Solution: Soloution is not required....

The increasing order

Question: The increasing order of basicity of the following compounds is : $(1)(1)(3)(4)$$(1)(1)(4)(3)$$(4)(2)(1)(3)$$(1)(2)(3)(3)$Correct Option: , 2 Solution:...

Which of the following forms stable

Question: Which of the following forms stable +4 oxidation state ?La(Z = 57)Eu(Z = 63)Gd(Z = 64)Ce(Z = 58)Correct Option: , 4 Solution: Soloution is not required....

Consider the following reaction :

Question: Consider the following reaction $\mathrm{xMnO}_{4}^{-}+\mathrm{yC}_{2} \mathrm{O}_{4}^{2-}+\mathrm{zH}^{+} \rightarrow \mathrm{xMn}^{2+}+2 \mathrm{yCO}_{2}+\frac{\mathrm{z}}{2} \mathrm{H}_{2} \mathrm{O}$ The values of x, y and z in the reaction are respectively :-5,2 and 162,5 and 82, 5 and 165,2 and 8 Correct Option: , 3 Solution: Solution Not Required...

Among the following oxoacids,

Question: Among the following oxoacids, the correct decreasing order of acid strength is :$\mathrm{HClO}_{4}\mathrm{HClO}_{3}\mathrm{HClO}_{2}\mathrm{HOCl}$$\mathrm{HClO}_{2}\mathrm{HClO}_{4}\mathrm{HClO}_{3}\mathrm{HOCl}$$\mathrm{HOCl}\mathrm{HClO}_{2}\mathrm{HClO}_{3}\mathrm{HClO}_{4}$$\mathrm{HClO}_{4}\mathrm{HOCl}\mathrm{HClO}_{2}\mathrm{HClO}_{3}$Correct Option: 1 Solution:...

In context of the lanthanoids, which of the following

Question: In context of the lanthanoids, which of the following statements is not correct ?Because of similar properties the separation of lanthanoids is not easyAvailability of 4f electrons results in the formation of compounds in +4 state for all the members of the seriesThere is a gradual decrease in the radii of the members with increasing atomic number in the seriesAll the members exhibit +3 oxidation stateCorrect Option: , 2 Solution: Soloution is not required....

Considering the basic strength

Question: Considering the basic strength of amines in aqueous solution, which one has the smallest $\mathrm{pK}_{\mathrm{b}}$ value ?$\left(\mathrm{CH}_{3}\right)_{3} \mathrm{~N}$$\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{NH}_{2}$$\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}$$\mathrm{CH}_{3} \mathrm{NH}_{2}$Correct Option: , 3 Solution:...

Iron exhibits +2 and +3 oxidation states.

Question: Iron exhibits +2 and +3 oxidation states. Which of the following statements about iron is incorrect ?Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds.Ferrous oxide is more basic in nature than the ferric oxide.Ferrous compounds are relatively more ionic than the corresponding ferric compounds.Ferrous compounds are less volatile than the corresponding ferric compoundsCorrect Option: , 2 Solution: Solution Not Required...

Which one of the following

Question: Which one of the following compounds will not be soluble in sodium bicarbonate ?Benzene sulphonic acidBenzoic acido-Nitrophenol$2,4,6$ - TrinitrophenolCorrect Option: , 2 Solution:...

The conjugate base of hydrazoic acid is :-

Question: The conjugate base of hydrazoic acid is :-$\mathrm{HN}_{3}^{-}$$\mathrm{N}_{3}^{-}$$\mathrm{N}_{2}^{-}$$\mathrm{N}^{-3}$Correct Option: , 2 Solution:...

Knowing that the chemistry of lanthanoids

Question: Knowing that the chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements is incorrect ?Ln(III) compounds are generally colourlessLn(III) hydroxides are mainly basic in characterBecause of the large size of the Ln(III) ions the bonding in its compounds is predominently ionic in characterThe ionic sizes of Ln(III) decrease in general with increasing atomic numberCorrect Option: 1 Solution: Incorrect...

In context with the transition elements,

Question: In context with the transition elements, which of the following statements is incorrect?In the highest oxidation states of the first five transition elements (Sc to Mn), all the 4s and 3d electrons are used for bonding.Once the d5 configuration is exceeded, the tendency to involve all the 3d electrons in bonding decreases.In addition to the normal oxidation states, the zero oxidation state is also shown by these elements in complexes.In the highest oxidation states, the transition meta...