The number of radial and angular nodes in $$4d$$ orbital are, respectively
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The number of radial and angular nodes in $$4d$$ orbital are, respectively
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Which of the following is a metalloid?
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The oxide which contains an odd electron at the nitrogen atom is
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Which one of the following is an example of disproportionation reaction?
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Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to
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s-block element which cannot be qualitatively confirmed by the flame test is
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The correct order of nucleophilicity is
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The major product of the following reaction is:
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Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product?
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The measured BOD values for four different water samples (A - D) are as follows: A = 3 ppm; B = 18 ppm; C = 21 ppm; D = 4 ppm. The water samples which can be called as highly polluted with organic wastes, are
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The role of depressants in 'Froth Floation method' is to
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The most common oxidation state of Lanthanoid elements is $$+3$$. Which of the following is likely to deviate easily from $$+3$$ oxidation state?
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Toluene can be easily converted into benzaldehyde by which of the following reagents?
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The final product 'A' in the following reaction sequence
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The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is
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Which statement is NOT correct for p-toluenesulphonyl chloride?
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Identify 'Z' among the following
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Match List I with List II.
| List-I (Enzyme) | List-II (Conversion of) |
|---|---|
| A. Invertase | I. Starch into maltose |
| B. Zymase | II. Maltose into glucose |
| C. Diastase | III. Glucose into ethanol |
| D. Maltase | IV. Cane sugar into glucose |
Choose the most appropriate answer from the options given below
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Which of the following is NOT an example of synthetic detergent?
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Which one of the following is a water soluble vitamin, that is not excreted easily?
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CNG is an important transportation fuel. When $$100$$ g CNG is mixed with $$208$$ g oxygen in vehicles, it leads to the formation of $$CO_2$$ and $$H_2O$$ and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is ______ [nearest integer] [Assume CNG to be methane]
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The moles of methane required to produce $$81$$ g of water after complete combustion is ______ $$\times 10^{-2}$$ mol. [nearest integer]
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Amongst $$SF_4, XeF_4, CF_4$$ and $$H_2O$$, the number of species with two lone pairs of electrons is ______
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A fish swimming in water body when taken out from the water body is covered with a film of water of weight $$36$$ g. When it is subjected to cooking at $$100°$$C, then the internal energy for vaporization in kJ mol$$^{-1}$$ is ______ [integer]
[Assume steam to be an ideal gas. Given $$\Delta_{vap}H^\circ$$ for water at $$373$$ K and $$1$$ bar is $$41.1$$ kJ mol$$^{-1}$$ : $$R = 8.31$$ J K$$^{-1}$$ mol$$^{-1}$$]
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$$40\%$$ of HI undergoes decomposition to $$H_2$$ and $$I_2$$ at $$300$$ K. $$\Delta G^\circ$$ for this decomposition reaction at one atmosphere pressure is ______ J mol$$^{-1}$$ [nearest integer]
(Use $$R = 8.31$$ J K$$^{-1}$$ mol$$^{-1}$$; $$\log 2 = 0.3010$$, $$\ln 10 = 2.3$$, $$\log 3 = 0.477$$)
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In a solid AB, A atoms are in ccp arrangement and B atoms occupy all the octahedral sites. If two atoms from the opposite faces are removed, then the resultant stoichiometry of the compound is $$A_xB_y$$. The value of $$x$$ is ______ [nearest integer]
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The osmotic pressure exerted by a solution prepared by dissolving $$2.0$$ g of protein of molar mass $$60$$ kg mol$$^{-1}$$ in $$200$$ mL of water at $$27°$$C is ______ Pa. [integer value] (use $$R = 0.083$$ L bar mol$$^{-1}$$ K$$^{-1}$$)
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$$Cu(s) + Sn^{2+}(0.001M) \to Cu^{2+}(0.01M) + Sn(s)$$
The Gibbs free energy change for the above reaction at $$298$$ K is $$x \times 10^{-1}$$ kJ mol$$^{-1}$$. The value of $$x$$ is ______ [nearest integer]
[Given : $$E^\circ_{Cu^{2+}/Cu} = 0.34$$ V; $$E^\circ_{Sn^{2+}/Sn} = -0.14$$ V; $$F = 96500$$ C mol$$^{-1}$$]
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Catalyst A reduces the activation energy for a reaction by $$10$$ kJ mol$$^{-1}$$ at $$300$$ K. The ratio of rate constants, $$\frac{k_T \text{ Catalysed}}{k_T \text{ Uncatalysed}}$$ is $$e^x$$. The value of $$x$$ is ______ [nearest integer] [Assume that the pre-exponential factor is same in both the cases. Given $$R = 8.31$$ J K$$^{-1}$$ mol$$^{-1}$$]
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Reaction of $$[Co(H_2O)_6]^{2+}$$ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in $$t_{2g}$$-orbitals of the product is ______
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