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Given below are two statements:
Statement I: The decrease in first ionization enthalpy from B to Al is much larger than that from Al to Ga.
Statement II: The d orbitals in Ga are completely filled.
In the light of the above statements, choose the most appropriate answer from the options given below
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According to MO theory the bond orders for O$$_2^{2-}$$, CO and NO$$^+$$ respectively, are
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Which of the following relations are correct?
(A) $$\Delta U = q + p\Delta V$$
(B) $$\Delta G = \Delta H - T\Delta S$$
(C) $$\Delta S = \frac{q_{rev}}{T}$$
(D) $$\Delta H = \Delta U - \Delta nRT$$
Choose the most appropriate answer from the options given below:
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An indicator 'X' is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion with H$$_2$$O$$_2$$ at room temp. The indicator 'X' forms blue colored complex with compound 'A' present in the solution. The indicator 'X' and compound 'A' respectively are
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Given below are two statements:
Statement I: Nickel is being used as the catalyst for producing syn gas and edible fats.
Statement II: Silicon forms both electron rich and electron deficient hydrides.
In the light of the above statements, choose the most appropriate answer from the options given below:
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When a hydrocarbon A undergoes combustion in the presence of air, it requires $$9.5$$ equivalents of oxygen and produces $$3$$ equivalents of water. What is the molecular formula of A?
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The concentration of dissolved Oxygen in water for growth of fish should be more than X ppm and Biochemical Oxygen Demand in clean water should be less than Y ppm. X and Y in ppm are, respectively.
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Match List I with List II.
| List I | List II |
|---|---|
| A. van't Hoff factor, i | I. Cryoscopic constant |
| B. k$$_f$$ | II. Isotonic solutions |
| C. Solutions with same osmotic pressure | III. $$\frac{\text{Normal molar mass}}{\text{Abnormal molar mass}}$$ |
| D. Azeotropes | IV. Solutions with same composition of vapour above it |
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Match List-I and List-II
| List-I | List-II |
|---|---|
| A. Osmosis | I. Solvent molecules pass through semi permeable membrane towards solvent side. |
| B. Reverse osmosis | II. Movement of charged colloidal particles under the influence of applied electric potential towards oppositely charged electrodes |
| C. Electro osmosis | III. Solvent molecules pass through semi permeable membrane towards solution side |
| D. Electrophoresis | IV. Dispersion medium moves in an electric field. |
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The major component of which of the following ore is sulphide based mineral?
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A solution of CrO$$_5$$ in amyl alcohol has a ____colour
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The set of correct statements is:
(i) Manganese exhibits $$+7$$ oxidation state in its oxide.
(ii) Ruthenium and Osmium exhibit $$+8$$ oxidation in their oxides.
(iii) Sc shows $$+4$$ oxidation state which is oxidizing in nature.
(iv) Cr shows oxidising nature in $$+6$$ oxidation state.
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Correct order of spin only magnetic moment of the following complex ions is:
(Given At. No. Fe : 26, Co : 27)
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The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)
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Find out the major product for the following reaction
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Find out the major products from the following reaction sequence.
Reaction of propanamide with Br$$_2$$ / KOH (aq) produces:
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Match List-I and List-II.
| List-I | List-II |
|---|---|
| A. Elastomeric polymer | I. Urea formaldehyde resin |
| B. Fibre polymer | II. Polystyrene |
| C. Thermosetting polymer | III. Polyester |
| D. Thermoplastic polymer | IV. Neoprene |
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A doctor prescribed the drug Equanil to a patient. The patient was likely to have symptoms of which disease?
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Following tetrapeptide can be represented as
(F, L, D, Y, I, Q, P are one letter codes for amino acids)
Assume that the radius of the first Bohr orbit of hydrogen atom is $$0.6$$ $$\text{\AA}$$. The radius of the third Bohr orbit of He$$^+$$ is ______ picometer. (Nearest Integer)
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At 298 K
$$\text{N}_2(g) + 3\text{H}_2(g) \rightleftharpoons 2\text{NH}_3(g), K_1 = 4 \times 10^5$$
$$\text{N}_2(g) + \text{O}_2(g) \rightleftharpoons 2\text{NO}(g), K_2 = 1.6 \times 10^{12}$$
$$\text{H}_2(g) + \frac{1}{2}\text{O}_2(g) \rightleftharpoons \text{H}_2\text{O}(g), K_3 = 1.0 \times 10^{-13}$$
Based on above equilibria, the equilibrium constant of the reaction,
$$2\text{NH}_3(g) + \frac{5}{2}\text{O}_2(g) \rightleftharpoons 2\text{NO}(g) + 3\text{H}_2\text{O}(g)$$
is ______ $$\times 10^{-33}$$ (Nearest integer)
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The volume of HCl, containing $$73$$ g L$$^{-1}$$, required to completely neutralise NaOH obtained by reacting $$0.69$$ g of metallic sodium with water, is ______ mL. (Nearest Integer)
(Given: molar Masses of Na, Cl, O, H are 23, 35.5, 16 and 1 g mol$$^{-1}$$ respectively)
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On heating, LiNO$$_3$$ gives how many compounds among the following?
Li$$_2$$O, N$$_2$$, O$$_2$$, LiNO$$_2$$, NO$$_2$$
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When $$0.01$$ mol of an organic compound containing $$60\%$$ carbon was burnt completely, $$4.4$$ g of CO$$_2$$ was produced. The molar mass of compound is ______ g mol$$^{-1}$$ (Nearest integer)
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A metal M forms hexagonal close-packed structure. The total number of voids in $$0.02$$ mol of it is ______ $$\times 10^{21}$$ (Nearest integer)
(Given N$$_A = 6.02 \times 10^{23}$$)
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The equilibrium constant for the reaction Zn(s) + Sn$$^{2+}$$(aq) $$\rightleftharpoons$$ Zn$$^{2+}$$(aq) + Sn(s) is $$1 \times 10^{20}$$ at 298 K. The magnitude of standard electrode potential of Sn/Sn$$^{2+}$$ if E$$^0_{\text{Zn}^{2+}/\text{Zn}} = -0.76$$ V is ______ $$\times 10^{-2}$$ V. (Nearest integer)
Given: $$\frac{2.303 RT}{F} = 0.059$$ V
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For conversion of compound A $$\to$$ B, the rate constant of the reaction was found to be $$4.6 \times 10^{-5}$$ L mol$$^{-1}$$ s$$^{-1}$$. The order of the reaction is ______.
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Total number of acidic oxides among N$$_2$$O$$_3$$, NO$$_2$$, N$$_2$$O, Cl$$_2$$O$$_7$$, SO$$_2$$, CO, CaO, Na$$_2$$O and NO is ______.
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The denticity of the ligand present in the Fehling's reagent is ______.
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