Which artificial sweetener contains chlorine ?
Question: Which artificial sweetener contains chlorine ?AspartameSaccharinSucraloseAlitameCorrect Option: , 3 Solution:...
Read More →For which of the following particles will it be most difficult
Question: For which of the following particles will it be most difficult to experimentally verify the de-Broglie relationship?a dust particlean electrona protonan $\alpha$-particle.Correct Option: 1 Solution: Solution not Required...
Read More →The de Broglie wavelength of a car of mass
Question: The de Broglie wavelength of a car of mass $1000 \mathrm{~kg}$ and velocity $36 \mathrm{~km} / \mathrm{hr}$ is : $\left(h=6.63 \times 10^{-34} \mathrm{Js}\right)$$6.626 \times 10^{-31} \mathrm{~m}$$6.626 \times 10^{-34} \mathrm{~m}$$6.626 \times 10^{-38} \mathrm{~m}$$6.626 \times 10^{-30} \mathrm{~m}$Correct Option: , 3 Solution: Solution not Required...
Read More →The wave number of the first emission line in the Balmer series
Question: The wave number of the first emission line in the Balmer series of H-Spectrum is : $(R=$ Rydberg constant $)$ :$\frac{3}{4} R$$\frac{9}{400} \mathrm{R}$$\frac{5}{36} R$$\frac{7}{6} R$Correct Option: , 3 Solution:...
Read More →If the kinetic energy of an electron is increased four times,
Question: If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become :-Two timesHalfOne fourthFour timeCorrect Option: , 2 Solution:...
Read More →The electrons identified by quantum numbers
Question: The electrons identified by quantum numbers $\mathrm{n}$ and $\ell$ :- (a) $\mathrm{n}=4, \ell=1$ (b) $\mathrm{n}=4, \ell=0$ (c) $\mathrm{n}=3, \ell=2$ (d) $\mathrm{n}=3, \ell=1$ Can be placed in order of increasing energy as$(\mathrm{a})(\mathrm{c})(\mathrm{b})(\mathrm{d})$$(\mathrm{c})(\mathrm{d})(\mathrm{b})(\mathrm{a})$$(\mathrm{d})(\mathrm{b})(\mathrm{c})(\mathrm{a})$$(b)(\mathrm{d})(\mathrm{a})$ (c)Correct Option: , 3 Solution:...
Read More →An aqueous solution contains
Question: An aqueous solution contains $0.10 \mathrm{M} \mathrm{H}_{2} \mathrm{~S}$ and $0.20 \mathrm{M} \mathrm{HCl}$. If the equilibrium constants for the formation of $\mathrm{HS}^{-}$from $\mathrm{H}_{2} \mathrm{~S}$ is $1.0 \times 10^{-7}$ and that of $\mathrm{S}^{2-}$ from $\mathrm{HS}^{-}$ions is $1.2 \times 10^{-13}$ then the concentration of $\mathrm{S}^{2-}$ ions in aqueous solution is :$3 \times 10^{-20}$$6 \times 10^{-21}$$5 \times 10^{-19}$$5 \times 10^{-8}$Correct Option: 1 Solutio...
Read More →The frequency of light emitted for the transition
Question: The frequency of light emitted for the transition $\mathrm{n}=4$ to $\mathrm{n}=2$ of $\mathrm{He}^{+}$is equal to the transition in $\mathrm{H}$ atom corresponding to which of the following$\mathrm{n}=3$ to $\mathrm{n}=1$$\mathrm{n}=2$ to $\mathrm{n}=1$$\mathrm{n}=3$ to $\mathrm{n}=2$$n=4$ to $n=3$Correct Option: , 2 Solution:...
Read More →In some solutions, the concentration of
Question: In some solutions, the concentration of $\mathrm{H}_{3} \mathrm{O}^{+}$remains constant even when small amounts of strong acid or strong base are added to them. These solutions are known as :-Colloidal solutionsTrue solutionsIdeal solutionsBuffer solutionsCorrect Option: , 4 Solution: Solution not required...
Read More →Ionisation energy of
Question: Ionisation energy of $\mathrm{He}^{+}$is $19.6 \times 10^{-18} \mathrm{~J}_{\text {atom }^{-1}}$. The energy of the first stationary state $(\mathrm{n}=1)$$8.82 \times 10^{-17} \mathrm{~J}$ atom $^{-1}$$4.41 \times 10^{-16} \mathrm{~J}_{\text {atom }}-1$$-4.41 \times 10^{-17} \mathrm{~J}_{\text {atom }^{-1}}$$-2.2 \times 10^{-15} \mathrm{~J}$ atom ${ }^{-1}$Correct Option: , 3 Solution:...
Read More →The energy required to break one mole of
Question: The energy required to break one mole of $\mathrm{Cl}-\mathrm{Cl}$ bonds in $\mathrm{Cl}_{2}$ is $242 \mathrm{~kJ} \mathrm{~mol}^{-1}$. The longest wavelength of light capable of breaking a single $\mathrm{Cl}-\mathrm{Cl}$ bond is $\left(\mathrm{C}=3 \times 10^{8} \mathrm{~ms}^{-1}\right.$ and $\left.\mathrm{N}_{\mathrm{A}}=6.02 \times 10^{23} \mathrm{~mol}^{-1}\right)$$494 \mathrm{~nm}$$594 \mathrm{~nm}$$640 \mathrm{~nm}$$700 \mathrm{~nm}$Correct Option: 1 Solution:...
Read More →Solve this following
Question: Zirconium phosphate $\left[\mathrm{Zr}_{3}\left(\mathrm{PO}_{4}\right)_{4}\right]$ dissociates into three zirconium cations of charge $+4$ and four phosphate anions of charge $-3$. If molar solubility of zirconium phosphate is denoted by $\mathrm{S}$ and its solubility product by $\mathrm{K}_{\mathrm{sp}}$ then which of the following relationship between $\mathrm{S}$ and $\mathrm{K}_{\mathrm{sp}}$ is correct$\mathrm{S}=\left\{\mathrm{K}_{\mathrm{sp}} / 144\right\}^{1 / 7}$$\mathrm{S}=\...
Read More →Calculate the wavelength (in nanometer) associated with
Question: Calculate the wavelength (in nanometer) associated with a proton moving at $1.0 \times 10^{3} \mathrm{~ms}^{-1}$ (Mass of proton $=1.67 \times 10^{-27} \mathrm{~kg}$ and $\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}$ ) :-$2.5 \mathrm{~nm}$$14.0 \mathrm{~nm}$$0.032 \mathrm{~nm}$$0.40 \mathrm{~nm}$Correct Option: , 4 Solution:...
Read More →Solve this following
Question: $\mathrm{NaOH}$ is a strong base. What will be pH of $5.0 \times 10^{-2} \mathrm{M} \mathrm{NaOH}$ solution $?(\log 2=0.3)$ $13.70$$13.00$$14.00$$12.70$Correct Option: , 4 Solution: Solution not required...
Read More →In an atom, an electron is moving with a speed
Question: In an atom, an electron is moving with a speed of $600 \mathrm{~m} / \mathrm{s}$ with an accuracy of $0.005 \% .$ Certainity with which the position of the electron can be located is $\left(\mathrm{h}=6.6 \times 10^{-34} \mathrm{~kg} \mathrm{~m}^{2} \mathrm{~s}^{-1}\right.$, mass of electron, $\left.\mathrm{e}_{\mathrm{m}}=9.1 \times 10^{-31} \mathrm{~kg}\right):-$$1.92 \times 10^{-3} \mathrm{~m}$$3.84 \times 10^{-3} \mathrm{~m}$$1.52 \times 10^{-4} \mathrm{~m}$$5.10 \times 10^{-3} \ma...
Read More →Which one of the following arrangements represents the correct order of solubilities of sparingly
Question: Which one of the following arrangements represents the correct order of solubilities of sparingly soluble salts $\mathrm{Hg}_{2} \mathrm{Cl}_{2}, \mathrm{Cr}_{2}\left(\mathrm{SO}_{4}\right)_{3}, \mathrm{BaSO}_{4}$ and $\mathrm{CrCl}_{3}$ respectively ?$\left(\frac{\mathrm{K}_{\text {sp }}}{4}\right)^{\frac{1}{3}},\left(\frac{\mathrm{K}_{\text {sp }}}{108}\right)^{\frac{1}{3}},\left(\mathrm{~K}_{\mathrm{sp}}\right)^{\frac{1}{2}},\left(\frac{\mathrm{K}_{\mathrm{sp}}}{27}\right)^{\frac{1}...
Read More →Which compound would give 5 -keto-2-methyl hexanal
Question: Which compound would give 5 -keto-2-methyl hexanal upon ozonlysis?Correct Option: , 4 Solution: Solution Not required...
Read More →In the reaction sequence
Question: In the reaction sequence $2 \mathrm{CH}_{3} \mathrm{CHO} \stackrel{\mathrm{OH}^{-}}{\longrightarrow} \mathrm{A} \stackrel{\Delta}{\longrightarrow} \mathrm{B}$; the product $\mathrm{B}$ is:-$\mathrm{CH}_{3}-\mathrm{CH}=\mathrm{CH}-\mathrm{CHO}$$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{3}$$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{OH}$Correct Option: 1 Solution: Solution Not required...
Read More →What would be the
Question: What would be the $\mathrm{pH}$ of a solution obtained by mixing $5 \mathrm{~g}$ of acetic acid and $7.5 \mathrm{~g}$ of sodium acetate and making the volume equal to $500 \mathrm{~mL}$ ? $\left(\mathrm{Ka}=1.75 \times 10^{-5}, \mathrm{pKa}=4.76\right)$$4.76\mathrm{pH}5.0$$\mathrm{pH}4.70$$\mathrm{pH}$ of solution will be equal to $\mathrm{pH}$ of acetic acid$\mathrm{pH}=4.70$Correct Option: 1 Solution: Solution not required...
Read More →A compound A with molecular formula
Question: A compound A with molecular formula $\mathrm{C}_{10} \mathrm{H}_{13} \mathrm{Cl}$ gives a white precipitate on adding silver nitrate solution. A on reacting with alcoholic $\mathrm{KOH}$ gives compound $\mathrm{B}$ as the main product. $\mathrm{B}$ on ozonolysis gives $\mathrm{C}$ and D. C gives Cannizaro reaction but not aldol condensation. D gives aldol condensation but not Cannizaro reaction. A is :Correct Option: , 2 Solution:...
Read More →How many litres of water must be added to 1 litre of an aqueous solution
Question: How many litres of water must be added to 1 litre of an aqueous solution of $\mathrm{HCl}$ with a $\mathrm{pH}$ of 1 to create an aqueous solution with $\mathrm{pH}$ of 2 ?$0.1 \mathrm{~L}$$0.9 \mathrm{~L}$$2.0 \mathrm{~L}$$9.0 \mathrm{~L}$Correct Option: , 4 Solution:...
Read More →The most suitable reagent for the conversion of
Question: The most suitable reagent for the conversion of $\mathrm{R}-\mathrm{CH}_{2}-\mathrm{OH} \rightarrow \mathrm{R}-\mathrm{CHO}$ is :-$\mathrm{CrO}_{3}$PCC (Pyridinium chlorochromate)$\mathrm{KMNO}_{4}$$\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}$Correct Option: , 2 Solution:...
Read More →Solve this following
Question: If $\mathrm{K}_{\mathrm{sp}}$ of $\mathrm{CaF}_{2}$ at $25^{\circ} \mathrm{C}$ is $1.7 \times 10^{-10}$, the combination amongst the following which gives a precipitate of $\mathrm{CaF}_{2}$ is :-$1 \times 10^{-2} \mathrm{M} \mathrm{Ca}^{2+}$ and $1 \times 10^{-5} \mathrm{MF}^{-}$$1 \times 10^{-4} \mathrm{M} \mathrm{Ca}^{2+}$ and $1 \times 10^{-4} \mathrm{MF}^{-}$$1 \times 10^{-3} \mathrm{M} \mathrm{Ca}^{2+}$ and $1 \times 10^{-5} \mathrm{M} \mathrm{F}^{-}$$1 \times 10^{-2} \mathrm{M} ...
Read More →The major organic compound formed by the reaction
Question: The major organic compound formed by the reaction of 1, 1, 1trichloroethane with silver powder is :-2-Butyne2 -ButeneAcetylenEtheneCorrect Option: 1 Solution:...
Read More →A compound with molecular mass 180 is acylated
Question: A compound with molecular mass 180 is acylated with $\mathrm{CH}_{3} \mathrm{COCl}$ to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is :-2546Correct Option: , 2 Solution:...
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