25 mL of silver nitrate solution (1M) is added dropwise to 25 mL of potassium iodide (1.05 M) solution. The ion(s) present in very small quantity in the solution is/are
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25 mL of silver nitrate solution (1M) is added dropwise to 25 mL of potassium iodide (1.05 M) solution. The ion(s) present in very small quantity in the solution is/are
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Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: In the photoelectric effect, the electrons are ejected from the metal surface as soon as the beam of light of frequency greater than threshold frequency strikes the surface.
Reason R: When the photon of any energy strikes an electron in the atom, transfer of energy from the photon to the electron takes place.
In the light of the above statements, choose the most appropriate answer from the options given below:
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For compound having the formula GaAlCl$$_4$$, the correct option from the following is
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For elements B, C, N, Li, Be, O and F, the correct order of first ionisation enthalpy is
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Match List-I with List-II:
| List-I Species | List-II Geometry/Shape | ||
|---|---|---|---|
| A. | H$$_3$$O$$^+$$ | I. | Tetrahedral |
| B. | Acetylide anion | II. | Linear |
| C. | NH$$_4^+$$ | III. | Pyramidal |
| D. | ClO$$_2^-$$ | IV. | Bent |
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Match List-I with List-II:
| List-I | List-II | ||
|---|---|---|---|
| A. | K | I. | Thermonuclear reactions |
| B. | KCl | II. | Fertilizer |
| C. | KOH | III. | Sodium potassium pump |
| D. | Li | IV. | Absorbent of CO$$_2$$ |
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Where Nu = Nucleophile
Find out the correct statement from the options given below for the above two reactions.
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Thin layer chromatography of a mixture shows the following observation.
The correct order of elution in the silica gel column chromatography is
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Arrange the following compounds in increasing order of rate of aromatic electrophilic substitution reaction.
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Given below are two statements:
Statement-I: If BOD is 4 ppm and dissolved oxygen is 8 ppm, then it is a good quality water.
Statement-II: If the concentration of zinc and nitrate salts are 5 ppm each, then it can be a good quality water.
In the light of the above statements, choose the most appropriate answer from the options below:
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In the extraction process of copper, the product obtained after carrying out the reactions
(i) $$2Cu_2S + 3O_2 \to 2Cu_2O + 2SO_2$$
(ii) $$2Cu_2O + Cu_2S \to 6Cu + SO_2$$ is called
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Given below are two statements:
Statement-I: Methane and steam passed over a heated Ni catalyst produces hydrogen gas.
Statement-II: Sodium nitrite reacts with NH$$_4$$Cl to give H$$_2$$O, N$$_2$$ and NaCl.
In the light of the above statements, choose the most appropriate answer from the options below:
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When a solution of mixture of two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed whereas on treatment with neutral FeCl$$_3$$, it gave deep red colour which disappeared on boiling and a brown red ppt was formed. The mixture contains
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The complex that dissolves in water is
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The set which does not have ambidentate ligand(s) is
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Which of the following complex has a possibility to exist as meridional isomer?
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L-isomer of tetrose X (C$$_4$$H$$_8$$O$$_4$$) gives positive Schiff's test and has two chiral carbons. On acetylation 'X' yields triacetate. 'X' also undergoes following reactions
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'A' and 'B' in the above reaction are :
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. 'X' is:
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The polymer X-consists of linear molecules and is closely packed. It is prepared in the presence of trimethylaluminiumpropyl and titanium tetrachloride under low pressure. The polymer X is
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A solution of sugar is obtained by mixing 200 g of its 25% solution and 500 g of its 40% solution (both by mass). The mass percentage of the resulting sugar solution is _______ (Nearest integer)
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Solid fuel used in rocket is a mixture of Fe$$_2$$O$$_3$$ and Al (in ratio 1 : 2). The heat evolved (kJ) per gram of the mixture is _______
Given $$\Delta H_f^0$$ Al$$_2$$O$$_3$$ = -1700 kJ mol$$^{-1}$$
$$\Delta H_f^0$$ Fe$$_2$$O$$_3$$ = -840 kJ mol$$^{-1}$$
Molar mass of Fe, Al and O are 56, 27 and 16 g mol$$^{-1}$$ respectively
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A mixture of one mole of H$$_2$$O and 1 mole of CO is taken in a 10 litre container and heated to 725 K. At equilibrium 40% of water by mass reacts with carbon monoxide according to the equation:
$$CO(g) + H_2O(g) \rightleftharpoons CO_2(g) + H_2(g)$$
The equilibrium constant $$K_C \times 10^2$$ for the reaction is _______ (Nearest integer)
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The number of hyperconjugation structures involved to stabilize carbocation formed in the reaction of 2-methylcyclohexan-1-ol with HBr is _______
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An atomic substance A of molar mass 12 g mol$$^{-1}$$ has a cubic crystal structure with edge length of 300 pm. The no. of atoms present in one unit cell of A is _______ (Nearest integer)
Given the density of A is 3.0 g m m$$^{-1}$$ and NA$$_A$$ = $$6.02 \times 10^{23}$$ mol$$^{-1}$$
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0.004 M K$$_2$$SO$$_4$$ solution is isotonic with 0.01 M glucose solution. Percentage dissociation of K$$_2$$SO$$_4$$ is _______ (Nearest integer)
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In an electrochemical reaction of lead, at standard temperature, if $$E^0_{Pb^{2+}/Pb} = m$$ Volt and $$E^0_{Pb^{4+}/Pb} = n$$ Volt, then the value of $$E^0Pb^{2+}/Pb^{4+}$$ is given by $$m - xn$$. The value of x is _______ (Nearest integer).
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KClO$$_3$$ + 6FeSO$$_4$$ + 3H$$_2$$SO$$_4$$ $$\to$$ KCl + 3Fe$$_2$$(SO$$_4$$)$$_3$$ + 3H$$_2$$O
The above reaction was studied at 300 K by monitoring the concentration of FeSO$$_4$$ in which initial concentration was 10 M and after half an hour became 8.8 M. The rate of production of Fe$$_2$$(SO$$_4$$)$$_3$$ is _______ $$\times 10^{-6}$$ mol L$$^{-1}$$ s$$^{-1}$$ (Nearest integer)
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The ratio of spin-only magnetic moment values $$\mu_{eff}[Cr(CN)_6]^{3-}$$ / $$\mu_{eff}[Cr(H_2O)_6]^{3+}$$ is _______
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The ratio x/y on completion of the reaction is
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