Solve this following
Question: The pH of a $0.1$ molar solution of the acid $\mathrm{HQ}$ is 3 . The value of the ionization constant, Ka of this acid is :- $1 \times 10^{-7}$$3 \times 10^{-7}$$1 \times 10^{-3}$$1 \times 10^{-5}$Correct Option: , 4 Solution:...
Read More →Iodoform can be prepared from all except :-
Question: Iodoform can be prepared from all except :-Isobutyl alcoholEthyl methyl ketoneIsopropyl alcohol3-Methyl-2-butanoneCorrect Option: 1 Solution: Solution not required...
Read More →In the given transformation,
Question: In the given transformation, which of the following is the most appropriate reagent ? $\mathrm{NaBH}_{4}$$\mathrm{NH}_{2} \mathrm{NH}_{2}$, $\mathrm{O} \mathrm{H}$$\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$$\mathrm{Na}$, Liq. $\mathrm{NH}_{3}$Correct Option: , 2 Solution: Solution not required...
Read More →Silver Mirror test is given by
Question: Silver Mirror test is given by which one of the following compounds?FormaldehydeBenzophenoneAcetaldehydeAcetoneCorrect Option: 1, 3 Solution: Solution not required...
Read More →Trichloroacetaldehyde was subjected to Cannizzaro's reaction
Question: Trichloroacetaldehyde was subjected to Cannizzaro's reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is$2,2,2$-TrichloropropanolChloroform$2,2,2$-TrichloroethanolTrichloromethanolCorrect Option: , 3 Solution: Solution not required...
Read More →An acid HA ionises as
Question: An acid HA ionises as $\mathrm{HA} \rightleftharpoons \mathrm{H}^{+}+\mathrm{A}^{-}$ The $\mathrm{pH}$ of $1.0 \mathrm{M}$ solution is 5 . Its dissociation constant would be :- $1 \times 10^{-10}$5$5 \times 10^{-8}$$1 \times 10^{-5}$Correct Option: 1 Solution:...
Read More →Ozonolysis of an organic compound 'A' produces acetone
Question: Ozonolysis of an organic compound 'A' produces acetone and propionaldehyde in equimolar mixture. Identify 'A' from the following compounds : -2-Methyl - 1- pentene1 -Pentene2-Pentene2 -Methyl-2-penteneCorrect Option: , 4 Solution: Solution not required...
Read More →Ozonolysis of an organic compound gives formaldehyde
Question: Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :-An isopropyl groupAn acetylenic triple bondTwo ethylenic double bondsA vinyl groupCorrect Option: , 4 Solution: Solution not required...
Read More →One mole of a symmetrical alkene on ozonolysis gives two moles
Question: One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is :-EthenePropene1 -Butene2-ButeneCorrect Option: , 4 Solution: Solution not required...
Read More →The structure of the products Q and R,
Question: The structure of the products Q and R, respectively, areNoneCorrect Option: 1 Solution: Solution not required...
Read More →Solve this following
Question: Solubility product of silver bromide is $5.0 \times 10^{-13}$. The quantity of potassium bromide (molar mass taken as $120 \mathrm{~g} \mathrm{~mol}^{-1}$ ) to be added to 1 litre of $0.05 \mathrm{M}$ solution of silver nitrate to start the precipitation of AgBr is :-$5.0 \times 10^{-8} \mathrm{~g}$$1.2 \times 10^{-10} \mathrm{~g}$$1.2 \times 10^{-9} \mathrm{~g}$$6.2 \times 10^{-5} \mathrm{~g}$Correct Option: , 3 Solution:...
Read More →The structure of the carbonyl compound P is
Question: The structure of the carbonyl compound P isCorrect Option: , 2 Solution: Solution not required...
Read More →In Cannizzaro reaction given below :-
Question: In Cannizzaro reaction given below :- The abstraction of proton from the carboxylic group The deprotonation of $\mathrm{PhCH}_{2} \mathrm{OH}$The attack of : $\stackrel{\ominus}{\mathrm{OH}}$ at the carboxyl groupThe transfer of hydride to the carbonyl groupCorrect Option: , 4 Solution: Solution not required...
Read More →In aqueous solution the ionization constants for carbonic acid
Question: In aqueous solution the ionization constants for carbonic acid are $\mathrm{K}_{1}=4.2 \times 10^{-7}$ and $\mathrm{K}_{2}=4.8$ $\times 10^{-11}$ Select the correct statement for a saturated $0.034 \mathrm{M}$ solution of the carbonic acid :- The concentration of $\mathrm{H}^{+}$is double that of $\mathrm{CO}_{3}{ }^{2-}$The concentration of $\mathrm{CO}_{3}^{2-}$ is $0.034 \mathrm{M}$The concentration of $\mathrm{CO}_{3}{ }^{2-}$ is greater than that of $\mathrm{HCO}_{3}^{-}$The conce...
Read More →Which of the following on heating with aqueous KOH,
Question: Which of the following on heating with aqueous KOH, produces acetaldehyde ?$\mathrm{CH}_{2} \mathrm{ClCH}_{2} \mathrm{Cl}$$\mathrm{CH}_{3} \mathrm{CHCl}_{2}$$\mathrm{CH}_{3} \mathrm{COCl}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}$Correct Option: , 2 Solution: Solution Not required...
Read More →Solve this following
Question: At $25^{\circ} \mathrm{C}$, the solubility producct of $\mathrm{Mg}(\mathrm{OH})_{2}$ is $1.0 \times 10^{-11}$. At which $\mathrm{pH}$, will $\mathrm{Mg}^{2+}$ ions start precipitating in the form of $\mathrm{Mg}(\mathrm{OH})_{2}$ from a solution of $0.001 \mathrm{M} \mathrm{Mg}^{2+}$ ions? 891011Correct Option: , 3 Solution: $10^{-11}=\left[\mathrm{Mg}^{+2}\right]\left[\mathrm{OH}^{-}\right]^{2}$ $10^{-11}=\left(10^{-3}\right)\left[\mathrm{OH}^{-}\right]^{2}$ ${\left[\mathrm{OH}^{-}\r...
Read More →Solve this following
Question: Solid $\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}$ is gradully dissolved in a $1.0 \times 10^{-4} \mathrm{M} \mathrm{Na}_{2} \mathrm{CO}_{3}$ solution. At what concentration of $\mathrm{Ba}^{2+}$ will a precipitate begin to form? $\left(\mathrm{K}_{\mathrm{SP}}\right.$ for $\left.\mathrm{Ba} \mathrm{CO}_{3}=5.1 \times 10^{-9}\right)$ $8.1 \times 10^{-8} \mathrm{M}$$8.1 \times 10^{-7} \mathrm{M}$$4.1 \times 10^{-5} \mathrm{M}$$5.1 \times 10^{-5} \mathrm{M}$Correct Option: , 4 Solution:...
Read More →The IUPAC name of the compound
Question: The IUPAC name of the compound 1, 2-Epoxy propanePropylene oxide1,2 -Oxo propane1,2 -PropoxideCorrect Option: 1 Solution:...
Read More →The IUPAC name of neopentane is :-
Question: The IUPAC name of neopentane is :-2 -methylpropane2,2 -dimethylbutane2 -methylbutane2, 2-dimethylpropaneCorrect Option: , 4 Solution:...
Read More →Solve this following
Question: Verify that $A(B+C)=(A B+A C)$, when $\mathrm{A}=\left[\begin{array}{cc}2 3 \\ -1 4 \\ 0 1\end{array}\right], \mathrm{B}=\left[\begin{array}{cc}5 -3 \\ 2 1\end{array}\right]$ and $\mathrm{C}=\left[\begin{array}{cc}-1 2 \\ 3 4\end{array}\right]$ Solution:...
Read More →Verify that
Question: Verify that $A(B+C)=(A B+A C)$, when $A=\left[\begin{array}{ll}1 2 \\ 3 4\end{array}\right], B=\left[\begin{array}{cc}2 0 \\ 1 -3\end{array}\right]$ and $C=\left[\begin{array}{cc}1 -1 \\ 0 1\end{array}\right]$ Solution:...
Read More →A vector vector r is inclined at equal angles to the three axes.
Question: A vector $\vec{r}$ is inclined at equal angles to the three axes. If the magnitude of $\vec{r}$ is $2 \sqrt{3}$ units, find $\vec{r}$ Solution: As the vectormakes equal angles with the axes, their direction cosines should also be same So, l = m = n And we know that, l2+ m2+ n2= 1 ⇒ l2+ l2+ l2= 1 3l2= 1 l = 1/3...
Read More →Using vectors,
Question: Using vectors, find the value ofksuch that the points (k, 10, 3), (1, 1, 3) and (3, 5, 3) are collinear. Solution: Let the given points be A(k, 10, 3), B(1, 1, 3) and C(3, 5, 3)....
Read More →For the following matrices, verify that
Question: For the following matrices, verify that $A(B C)=(A B) C$ :. $\mathrm{A}=\left[\begin{array}{rrr}2 3 -1 \\ 3 0 2\end{array}\right], \mathrm{B}=\left[\begin{array}{l}1 \\ 1 \\ 2\end{array}\right]$ and $\mathrm{C}=\left[\begin{array}{ll}1 -2\end{array}\right]$ Solution:...
Read More →If are the position vectors of A and B, respectively,
Question: If are the position vectors of A and B, respectively, find the position vector of a point C in BA produced such that BC = 1.5 BA. Solution:...
Read More →