Number of paramagnetic oxides among the following given oxides is _________.
Li$$_2$$O, CaO, Na$$_2$$O$$_2$$, KO$$_2$$, MgO and K$$_2$$O
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Number of paramagnetic oxides among the following given oxides is _________.
Li$$_2$$O, CaO, Na$$_2$$O$$_2$$, KO$$_2$$, MgO and K$$_2$$O
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Hydrogen peroxide reacts with iodine in basic medium to give:
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The potassium ferrocyanide solution gives a Prussian blue colour, when added to:
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Which one of the following compounds is aromatic in nature?
The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are:
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In the following sequence of reactions, C$$_3$$H$$_6$$ $$\xrightarrow{H^+/H_2O}$$ A $$\xrightarrow[dil KOH]{KIO}$$ B + C. The compounds B and C respectively are:
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Water sample is called cleanest on the basis of which one of the BOD values given below:
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Which one of the following given graphs represents the variation of rate constant (k) with temperature (T) for an endothermic reaction?
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Match List - I with List - II.
List-I (Colloid Preparation Method) List-II (Chemical Reaction)
(a) Hydrolysis (i) 2AuCl$$_3$$ + 3HCHO + 3H$$_2$$O $$\rightarrow$$ 2Au(sol) + 3HCOOH + 6HCl
(b) Reduction (ii) As$$_2$$O$$_3$$ + 3H$$_2$$S $$\rightarrow$$ As$$_2$$S$$_3$$(sol) + 3H$$_2$$O
(c) Oxidation (iii) SO$$_2$$ + 2H$$_2$$S $$\rightarrow$$ 3S(sol) + 2H$$_2$$O
(d) Double Decomposition (iv) FeCl$$_3$$ + 3H$$_2$$O $$\rightarrow$$ Fe(OH)$$_3$$(sol) + 3HCl
Choose the most appropriate answer from the options given below:
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Calamine and Malachite, respectively, are the ores of:
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The oxide without nitrogen-nitrogen bond is:
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In the given chemical reaction, colors of the Fe$$^{2+}$$ and Fe$$^{3+}$$ ions, are respectively:
$$5Fe^{2+} + MnO_4^- + 8H^+ \rightarrow Mn^{2+} + 4H_2O + 5Fe^{3+}$$
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Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d$$^5$$:
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The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion M$$^{Z+}$$ are $$-0.8\Delta_0$$ and 3.87 BM, respectively. Identify M$$^{Z+}$$:
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Experimentally reducing a functional group cannot be done by which one of the following reagents?
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Given below are two statements:
Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.
Statement II : The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.
In the light of the above statements, choose the most appropriate answer from the options given below:
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In the following sequence of reactions a compound A, (molecular formula C$$_6$$H$$_{12}$$O$$_2$$) with a straight chain structure gives a C$$_4$$ carboxylic acid. A is:
$$A \xrightarrow[\mathrm{H_3O^+}]{\mathrm{LiAlH_4}} B \xrightarrow{\text{Oxidation}} \text{C}_4\text{-carboxylic acid}$$
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Which one of the following gives the most stable Diazonium salt?
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Identify A in the following reaction.
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Monomer units of Dacron polymer are:
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The number of atoms in 8 g of sodium is $$x \times 10^{23}$$. The value of x is _________. (Nearest integer)
Given: N$$_A$$ = $$6.02 \times 10^{23}$$ mol$$^{-1}$$, Atomic mass of Na = 23.0 u
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A 50 watt bulb emits monochromatic red light of wavelength of 795 nm. The number of photons emitted per second by the bulb is $$x \times 10^{20}$$. The value of x is _________. (Nearest integer)
[Given: h = $$6.63 \times 10^{-34}$$ Js and c = $$3.0 \times 10^8$$ ms$$^{-1}$$]
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The spin-only magnetic moment value of B$$_2^+$$ species is _________ $$\times 10^{-2}$$ BM (Nearest integer)
[Given: $$\sqrt{3}$$ = 1.73]
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An empty LPG cylinder weighs 14.8 kg. When full, it weighs 29.0 kg and shows a pressure of 3.47 atm. In the course of use at ambient temperature, the mass of the cylinder is reduced to 23.0 kg. The final pressure inside the cylinder is _________ atm. (Nearest integer)
(Assume LPG to be an ideal gas)
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For the reaction 2NO$$_2$$(g) $$\rightleftharpoons$$ N$$_2$$O$$_4$$(g), when $$\Delta S = -176.0$$ J K$$^{-1}$$ and $$\Delta H = -57.8$$ kJ mol$$^{-1}$$ the magnitude of $$\Delta G$$ at 298 K for the reaction is _________ kJ mol$$^{-1}$$. (Nearest integer)
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The molar solubility of Zn(OH)$$_2$$ in 0.1M NaOH solution is $$x \times 10^{-18}$$ M. The value of x is _________. (Nearest integer)
Given: The solubility product of Zn(OH)$$_2$$ is $$2 \times 10^{-20}$$
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If 80 g of copper sulphate CuSO$$_4$$.5H$$_2$$O is dissolved in deionised water to make 5 L of solution. The concentration of the copper sulphate solution is $$x \times 10^{-3}$$ mol $$L^{-1}$$. The value of x is _________.
[Atomic masses Cu : 63.54u, S : 32u, O : 16u, H : 1u]
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If the conductivity of mercury at 0°C is $$1.07 \times 10^6$$ S m$$^{-1}$$ and the resistance of a cell containing mercury is 0.243$$\Omega$$, then the cell constant of the cell is $$x \times 10^4$$ m$$^{-1}$$. The value of x is _________. (Nearest integer)
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The sum of oxidation states of two silver ions in[Ag(NH₃)₂]⁺ and [Ag(CN)₂]⁻ complex is _________.
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A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and Histidine will have _________ peptide linkages.
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