The number of compound/s
Question: The number of compound/s given below which contain/s $-\mathrm{COOH}$ group isSulphanilic acidPicric acidAspirinAscorbic acidCorrect Option: 1 Solution: $\longrightarrow \mathrm{COOH}$ group present in...
Read More →Most suitable salt which can be used for efficient clotting of blood will be :-
Question: Most suitable salt which can be used for efficient clotting of blood will be :-$\mathrm{NaHCO}_{3}$$\mathrm{FeSO}_{4}$$\mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2}$$\mathrm{FeCl}_{3}$Correct Option: , 4 Solution: Blood : negatively charged sol According to Hardly-schulz rule, for the negatively charged sol, most (+) ve ion is needed for its efficient coagulation. Ans.: $\mathrm{FeCl}_{3}$...
Read More →Most suitable salt which can be used for efficient clotting of blood will be :-
Question: Most suitable salt which can be used for efficient clotting of blood will be :-$\mathrm{NaHCO}_{3}$$\mathrm{FeSO}_{4}$$\mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2}$$\mathrm{FeCl}_{3}$Correct Option: , 4 Solution: Blood : negatively charged sol According to Hardly-schulz rule, for the negatively charged sol, most (+) ve ion is needed for its efficient coagulation. Ans.: $\mathrm{FeCl}_{3}$...
Read More →Given below are two statements :one is labelled as Assertion A and the other
Question: Given below are two statements :one is labelled as Assertion A and the other is labelled as Reason R Assertion $\mathbf{A}:$ In $\mathrm{T} \ell \mathrm{I}_{3}$, isomorphous to $\mathrm{CsI}_{3}$, the metal is present in $+1$ oxidation state. Reason R : T $\ell$ metal has fourteen $\mathrm{f}$ electrons in the electronic configuration. In the light of the above statements, choose the most appropriate answer from the options given below:$\mathbf{A}$ is correct but $\mathbf{R}$ is not co...
Read More →If a compound AB
Question: If a compound $\mathrm{AB}$ dissociates to the extent of $75 \%$ in an aqueous solution, the molality of the solution which shows a $2.5 \mathrm{~K}$ rise in the boiling point of the solution is____________ molal. (Rounded-off to the nearest integer) $\left[\mathrm{K}_{\mathrm{b}}=0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right]$ Solution: $\alpha=0.75, \mathrm{n}=2$ $\mathrm{i}=1-\alpha+\mathrm{n} \alpha=1-0.75+2 \times 0.75=1.75$ $\Delta \mathrm{T}_{\mathrm{b}}=\mathrm{ik}_{\m...
Read More →Which of the following forms of hydrogen emits
Question: Which of the following forms of hydrogen emits low energy $\beta^{-}$particles?Deuterium ${ }_{1}^{2} \mathrm{H}$Tritium ${ }_{1}^{3} \mathrm{H}$Protium ${ }_{1}^{1} \mathrm{H}$Proton $\mathrm{H}^{+}$Correct Option: , 2 Solution: For tritium $\left({ }_{1}^{3} H\right)$ No. of neutron $(\mathrm{n})=2$ No. of proton $(\mathrm{p})=1$ $\frac{n}{p}=2$ $\because \frac{\mathrm{n}}{\mathrm{p}}$ is high tritium wil emit $\beta$ particle....
Read More →What is the correct sequence of reagents used for converting nitrobenzene into m-dibromobenzene ?
Question: What is the correct sequence of reagents used for converting nitrobenzene into m-dibromobenzene ? Correct Option: , 2 Solution: Correct sequence of reagents for the following conversion....
Read More →Solve this following
Question: Let $f:(\mathrm{a}, \mathrm{b}) \rightarrow \mathbf{R}$ be twice differentiable function such that $f(x)=\int_{a}^{x} g(t)$ dt for a differentiable function $\mathrm{g}(\mathrm{x})$. If $f(\mathrm{x})=0$ has exactly five distinct roots in $(a, b)$, then $g(x) g^{\prime}(x)=0$ has at least: twelve roots in $(a, b)$five roots in $(a, b)$seven roots in $(a, b)$three roots in $(a, b)$Correct Option: , 3 Solution: $f(x)=\int_{a}^{x} g(t) d t$ $f(x) \rightarrow 5$ $f^{\prime}(x) \rightarrow ...
Read More →Given below are two statements:
Question: Given below are two statements: Statement-I : $\alpha$ and $\beta$ forms of sulphur can change reversibly between themselves with slow heating or slow cooling. Statement-II : At room temperature the stable crystalline form of sulphur is monoclinic sulphur. In the light of the above statements, choose the correct answer from the options given below:Statement I is false but Statement II is true.Both Statement I and Statement II are true.Both Statement I is true but Statement II is false....
Read More →What is ' X '
Question: What is ' $\mathrm{X}^{\prime}$ in the given reaction? Correct Option: 1 Solution:...
Read More →Number of bridging CO ligands in
Question: Number of bridging $\mathrm{CO}$ ligands in $\left[\mathrm{Mn}_{2}(\mathrm{CO})_{10}\right]$ is_______. Solution: $\mathrm{Mn}_{2}(\mathrm{CO})_{10}$ structure is Zero bridging CO ligands are present...
Read More →Solve this following
Question: Let $\overrightarrow{\mathrm{a}}, \overrightarrow{\mathrm{b}}$ and $\overrightarrow{\mathrm{c}}$ be three vectors such that $\overrightarrow{\mathrm{a}}=\overrightarrow{\mathrm{b}} \times(\overrightarrow{\mathrm{b}} \times \overrightarrow{\mathrm{c}})$. If magnitudes of the vectors $\overrightarrow{\mathrm{a}}, \overrightarrow{\mathrm{b}}$ and $\vec{c}$ are $\sqrt{2}, 1$ and 2 respectively and the angle between $\overrightarrow{\mathrm{b}}$ and $\overrightarrow{\mathrm{c}}$ is $\theta\...
Read More →3.12g of oxygen is adsorbed on 1.2g of platinum metal.
Question: $3.12 \mathrm{~g}$ of oxygen is adsorbed on $1.2 \mathrm{~g}$ of platinum metal. The volume of oxygen adsorbed per gram of the adsorbent at $1 \mathrm{~atm}$ and $300 \mathrm{~K}$ in $\mathrm{L}$ is______. $\left[\mathrm{R}=0.0821 \mathrm{~L}\right.$ atm $\left.\mathrm{K}^{-1} \mathrm{~mol}^{-1}\right]$ Solution: $\mathrm{V}=\frac{\frac{3.12}{32} \times 0.0821 \times 300}{1}=2.40 \mathrm{l}$ $\because 1.2 \mathrm{gm}$ adsorbs $2.40 l$ $\therefore 1 \mathrm{gm}$ adsorbs $2 l$...
Read More →Gaseous cyclobutene isomerizes to butadiene in a first order process which has a 'k' value
Question: Gaseous cyclobutene isomerizes to butadiene in a first order process which has a 'k' value of $3.3 \times 10^{-4} \mathrm{~s}^{-1}$ at $153^{\circ} \mathrm{C}$. The time in minutes it takes for the isomerization to proceed $40 \%$ to completion at this temperature is _____. (Rounded off to the nearest integer) Solution: $\mathrm{Kt}=\ln \frac{[\mathrm{A}]_{0}}{[\mathrm{~A}]_{\mathrm{t}}}$ $3.3 \times 10^{-4} \times \mathrm{t}=\ell \mathrm{n}\left(\frac{100}{60}\right)$ $\mathrm{t}=1547...
Read More →Solve this following
Question: Consider a circle $C$ which touches the $y$-axis at $(0,6)$ and cuts off an intercept $6 \sqrt{5}$ on the x-axis. Then the radius of the circle $\mathrm{C}$ is equal to : $\sqrt{53}$98$\sqrt{82}$Correct Option: , 2 Solution: $r=\sqrt{6^{2}+(3 \sqrt{5})^{2}}$ $=\sqrt{36+45}=9$...
Read More →The method used
Question: The method used for the purification of Indium is :van Arkel methodliquationzone refiningvapour phase refiningCorrect Option: , 3 Solution: Zone refining is used for the purification of indium....
Read More →224 ml of SO2(g) at 298 k and 1 atm is
Question: $224 \mathrm{~mL}$ of $\mathrm{SO}_{2(\mathrm{~g})}$ at $298 \mathrm{~K}$ and 1 atm is passed through $100 \mathrm{~mL}$ of $0.1 \mathrm{M} \mathrm{NaOH}$ solution. The non-volatile solute produced is dissolved in $36 \mathrm{~g}$ of water. The lowering of vapour pressure of solution (assuming the solution is dilute) $\left(\mathrm{P}_{\left(\mathrm{H}_{2} \mathrm{O}\right)}=24 \mathrm{~mm}\right.$ of $\left.\mathrm{Hg}\right)$ is $x \times 10^{-2} \mathrm{~mm}$ of $\mathrm{Hg}$, the v...
Read More →The coordination number of an atom in a body-centered cubic structure
Question: The coordination number of an atom in a body-centered cubic structure is _______. [Assume that the lattice is made up of atoms.] Solution: 8...
Read More →Solve this following
Question: Which of the following is the negation of the statement "for all $\mathrm{M}0$, there exists $\mathrm{x} \in \mathrm{S}$ such that $\mathrm{x} \geq \mathrm{M}^{\prime \prime}$ ? there exists $\mathrm{M}0$, such that $\mathrm{x}\mathrm{M}$ for all $\mathrm{x} \in \mathrm{S}$there exists $M0$, there exists $x \in S$ such that $x \geq M$there exists $\mathrm{M}0$, there exists $\mathrm{x} \in \mathrm{S}$ such that $\mathrm{x}\mathrm{M}$there exists $M0$, such that $x \geq M$ for all $x \i...
Read More →Dichromate ion is treated with base,
Question: Dichromate ion is treated with base, the oxidation number of $\mathrm{Cr}$ in the product formed is_____. Solution: $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}+\mathrm{OH}^{-} \longrightarrow \mathrm{CrO}_{4}^{2-}$ Oxidation state of $\mathrm{Cr}$ in $\mathrm{CrO}_{4}^{2-}$ is $+6$...
Read More →The stepwise formation
Question: The stepwise formation of $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}$ is given below $\mathrm{Cu}^{2+}+\mathrm{NH}_{3} \stackrel{\mathrm{K}_{1}}{=}=\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)\right]^{2+}$ $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)\right]^{2+}+\mathrm{NH}_{3} \rightleftharpoons\left[\mathrm{K}_{2} \Longrightarrow \mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{2}\right]^{2+}$ $\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{2}\right]^{2+}+\mathrm{NH}_{...
Read More →Solve this following
Question: Let $\mathbf{N}$ be the set of natural numbers and a relation $R$ on $N$ be defined by $\mathrm{R}=\left\{(\mathrm{x}, \mathrm{y}) \in \mathbf{N} \times \mathbf{N}: \mathrm{x}^{3}-3 \mathrm{x}^{2} \mathrm{y}-\mathrm{xy}^{2}+3 \mathrm{y}^{3}=0\right\}$ Then the relation $R$ is : symmetric but neither reflexive nor transitivereflexive but neither symmetric nor transitivereflexive and symmetric, but not transitivean equivalence relationCorrect Option: , 2 Solution: $x^{3}-3 x^{2} y-x y^{2...
Read More →A homogeneous ideal gaseous reaction
Question: A homogeneous ideal gaseous reaction $\mathrm{AB}_{2(\mathrm{~g})} \rightleftharpoons \mathrm{A}_{(\mathrm{g})}+2 \mathrm{~B}_{(\mathrm{g})}$ is carried out in a 25 litre flask at $27^{\circ} \mathrm{C}$. The initial amount of $\mathrm{AB}_{2}$ was 1 mole and the equilibrium pressure was $1.9$ atm. The value of $K_{P}$ is $x \times 10^{-2}$. The value of $x$ is__________ .(Integer answer) Solution: $\mathrm{AB}_{2}=\mathrm{A} \quad+\quad 2 \mathrm{~B}$ $1.9 \times 25=\mathrm{n}_{\mathr...
Read More →The major product of the following reaction is:
Question: The major product of the following reaction is: $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CH}_{2} \underset{\text { Rh catalyst }}{\stackrel{\mathrm{H}_{2} / \mathrm{CO}}{\longrightarrow}}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CH}-\mathrm{CHO}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CHO}$$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CHO}$Correct Option: , 3 Solution: OXO PROCESS (Hydroformylation) :...
Read More →A certain gas obeys
Question: A certain gas obeys $P\left(V_{m}-b\right)=R T$. The value of $\left(\frac{\partial Z}{\partial P}\right)_{T}$ is $\frac{x b}{R T}$. The value of $x$ is_______. (Integer answer) $(Z$ : compressibility factor) Solution: $Z=1+\frac{P b}{R T}$ $\left(\frac{\partial Z}{d P}\right)_{T}=0+\frac{b}{R T} \times 1$...
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