The correct order of ionic radii for the ions, P$$^{3-}$$, S$$^{2-}$$, Ca$$^{2+}$$, K$$^+$$, Cl$$^-$$ is:
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The correct order of ionic radii for the ions, P$$^{3-}$$, S$$^{2-}$$, Ca$$^{2+}$$, K$$^+$$, Cl$$^-$$ is:
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The compound/s which will show significant intermolecular H-bonding is/are:
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The oxide that gives H$$_2$$O$$_2$$ most readily on treatment with H$$_2$$O is:
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Choose the correct statement from the following:
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The major product (A) formed in the reaction given below is:
In stratosphere most of the ozone formation is assisted by:
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Lyophilic sols are more stable than lyophobic sols because:
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Match List-I with List-II:
List-I (Name of ore/mineral) List-II (Chemical formula)
(a) Calamine (i) ZnS
(b) Malachite (ii) FeCO$$_3$$
(c) Siderite (iii) ZnCO$$_3$$
(d) Sphalerite (iv) CuCO$$_3$$.Cu(OH)$$_2$$
Choose the most appropriate answer from the options given below:
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Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?
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Potassium permanganate on heating at 513 K gives a product which is:
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Which one of the following is used to remove most of plutonium from spent nuclear fuel?
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The addition of dilute NaOH to Cr$$^{3+}$$ salt solution will give:
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The major product of the following reaction, if it occurs by S$$_N$$2 mechanism is:
Given below are two statements:
Statement I : Ethyl pent-4-yn-oate on reaction with CH$$_3$$MgBr gives a 3°-alcohol.
Statement II : In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH$$_3$$MgBr.
In the light of the above statements, choose the most appropriate answer from the options given below:
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Which one of the following reactions will not yield propanoic acid?
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The correct structures of A and B formed in the following reactions are:
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Which one of the following is the major product of the given reaction?
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Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and pain?
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Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?
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Hydrolysis of sucrose gives:
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100 g of propane is completely reacted with 1000 g of oxygen. The mole fraction of carbon dioxide in the resulting mixture is $$x \times 10^{-2}$$. The value of $$x$$ is _________. (Nearest integer)
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The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 mW and wavelength of 1000 nm, in 0.1 second is $$x \times 10^{13}$$. The value of x is _________. (Nearest integer)
(h = $$6.63 \times 10^{-34}$$ Js, c = $$3.00 \times 10^8$$ ms$$^{-1}$$)
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The number of species having non-pyramidal shape among the following is:
(A) SO$$_3$$
(B) NO$$_3^-$$
(C) PCl$$_3$$
(D) CO$$_3^{2-}$$
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Two flasks I and II shown below are connected by a valve of negligible volume.
When the valve is opened, the final pressure of the system in bar is $$x \times 10^{-2}$$. The value of x is _________. (Integer answer)
[Assume : Ideal gas; 1 bar = $$10^5$$ Pa; Molar mass of N$$_2$$ = 28.0 mol$$^{-1}$$; R = 8.31 J mol$$^{-1}$$ K$$^{-1}$$]
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Data given for the following reaction is as follows:
FeO$$_{(s)}$$ + C$$_{(graphite)}$$ $$\rightarrow$$ Fe$$_{(s)}$$ + CO$$_{(g)}$$
Substance $$\Delta_f H°$$(kJ mol$$^{-1}$$) $$\Delta S°$$(J mol$$^{-1}$$ K$$^{-1}$$)
FeO$$(s)$$ -266.3 57.49
C$$(graphite)$$ 0 5.74
Fe$$(s)$$ 0 27.28
CO$$(g)$$ -110.5 197.6
The minimum temperature in K at which the reaction becomes spontaneous is _________. (Integer answer)
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When 5.1 g of solid NH$$_4$$HS is introduced into a two litre evacuated flask at 27°C, 20% of the solid decomposes into gaseous ammonia and hydrogen sulphide. The K$$_p$$ for the reaction at 27°C is $$x \times 10^{-2}$$. The value of x is _________. (Integer answer)
[Given 1R = 0.082 L atm K$$^{-1}$$ mol$$^{-1}$$]
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40 g of glucose (Molar mass = 180) is mixed with 200 mL of water. The freezing point of solution is _________ K. (Nearest integer)
[Given : K$$_f$$ = 1.86 K kg mol$$^{-1}$$; Density of water = 1.00 g cm$$^{-3}$$; Freezing point of water = 273.15 K]
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The resistance of conductivity cell with cell constant 1.14 cm$$^{-1}$$, containing 0.001M KCl at 298 K is 1500$$\Omega$$. The molar conductivity of 0.001M KCl solution at 298 K in S cm$$^2$$ mol$$^{-1}$$ is _________. (Integer answer)
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The first order rate constant for the decomposition of CaCO$$_3$$ at 700 K is $$6.36 \times 10^{-3}$$ s$$^{-1}$$ and activation energy is 209 kJ mol$$^{-1}$$. Its rate constant (in s$$^{-1}$$) at 600 K is $$x \times 10^{-6}$$. The value of x is _________. (Nearest integer)
[Given R = 8.31 J K$$^{-1}$$ mol$$^{-1}$$; log $$6.36 \times 10^{-3}$$ = -2.19, $$10^{-4.79}$$ = $$1.62 \times 10^{-5}$$]
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The number of optical isomers possible for [Cr(C$$_2$$O$$_4$$)$$_3$$]$$^{3-}$$ is:
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