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The molecular formula of a commercial resin used for exchanging ions in water softening is $$C_8H_7SO_3Na$$ (molecular weight = 206). What would be the maximum uptake of $$Ca^{2+}$$ ions by the resin if expressed in mol per gm?
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Which of the following is the energy of a possible excited state of hydrogen?
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The ionic radii (in $$\mathring{A}$$) of $$N^{3-}$$, $$O^{2-}$$ and $$F^{-}$$ are respectively:
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The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is:
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The following reaction is performed at 298 K.
$$2NO(g) + O_2(g) \rightleftharpoons 2NO_2(g)$$
The standard free energy of the formation of $$NO(g)$$ is 86.6 kJ mol$$^{-1}$$ at 298 K. What is the standard free energy of the formation of $$NO_2(g)$$ at 298 K? $$(K_P = 1.6 \times 10^{12})$$
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The standard Gibbs energy change at 300 K for the reaction $$2A \rightleftharpoons B + C$$ is 2494.2 J. At a given time, the composition of the reaction mixture is $$[A] = \frac{1}{2}$$, $$[B] = 2$$ and $$[C] = \frac{1}{2}$$. The reaction proceeds in the:
[R = 8.314 J/K-mol, e = 2.718] {Given antilog (-0.44) = 0.36}
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From the following statements, choose the incorrect statement regarding $$H_2O_2$$.
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Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?
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In Carius method of estimation of halogens, 250 mg of an organic compound gave 141 mg AgBr. What is the percentage of bromine in the compound (atomic mass of Ag = 108 and atomic number of Br = 80)?
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Which of the following compounds will exhibit geometrical isomerism?
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Assertion: Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen.
Reason: The reaction between nitrogen and oxygen requires high temperature.
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Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 $$\mathring{A}$$. The radius of sodium atom is approximately:
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The vapour pressure of acetone at 20$$^\circ$$C is 185 torr. When 1.2 g of a non-volatile substance was dissolved in 100 g of acetone at 20$$^\circ$$C, its vapour pressure was 183 torr. The molar mass (g mol$$^{-1}$$) of the substance is:
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Two Faraday of electricity is passed through a solution of $$CuSO_4$$. The mass of copper deposited at the cathode is: (Atomic mass of Cu = 63.5 amu)
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Higher order (>3) reactions are rare due to:
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3 g of activated charcoal was added to 50 mL of acetic acid solution (0.06 N) in a flask. After an hour, it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is:
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In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?
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Which among the following is the most reactive?
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Which one has the highest boiling point?
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Match the catalysts to the correct process.
Catalyst Process
A. $$TiCl_3$$ i. Wacker process
B. $$PdCl_2$$ ii. Ziegler-Natta polymerisation
C. $$CuCl_2$$ iii. Contact process
D. $$V_2O_5$$ iv. Deacon's process
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Which one of the following compounds is not a yellow colored compound?
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The colour of $$KMnO_4$$ is due to: [where M $$\rightarrow$$ metal, L $$\rightarrow$$ ligand]
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The number of geometric isomers that can exist for square planar $$[Pt(Cl)(py)(NH_3)(NH_2OH)]^+$$ is (py = pyridine):
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The synthesis of alkyl fluorides is best accomplished by:
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Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?
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In the following sequence of reactions:
Toluene $$\xrightarrow{KMnO_4}$$ A $$\xrightarrow{SOCl_2}$$ B $$\xrightarrow[ BaSO_4]{H_2/Pd}$$ C
The Product C is:
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In the reaction,
The product E is
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Which polymer is used in the manufacture of paints and lacquers?
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Which of the following compounds is not an antacid?
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Which of the vitamins given below is water soluble?
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