Solute - Solvent combination for a solution of camphor in nitrogen gas.

The oxidation number of Co in the complex \(\left[ Co \left( H _2 NCH _2 CH _2 NH _2\right)_3\right]_2\left( SO _4\right)_3\) is:

Royal records were engraved on 'tamra-patra' in ancient times. 'Tamra patra' here means

The decreasing order of basicity of following amines in aqueous phase ;
(A) N, N-Dimethylmethamine
(B) Methanamine
(C) N-Ethylethanamine
(D) Phenylmethanamine
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A solution of 2.5 g of ethanoic acid in 75 g of benzene is prepared. What is the molar mass of ethanoic acid, moles of ethanoic acid, mass of benzene and molality of ethanoic acid?
(A) \(0.556 \text{ mol } kg^{-1}\)
(B) \(0.0417 \text{ mol}\)
(C) \(60 \text{ g } mol^{-1}\)
(D) \(0.075 \text{ kg}\)
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Isotonic solutions must have the same
(A) Solute
(B) Density
(C) Elevation in boiling point
(D) Depression in freezing point
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Read the passage carefully and answer the Questions
\(KMnO _4\) is prepared by the fusion of \(MnO _2\) with an alkali metal hydroxide and an oxidizing agent like \(KNO _3\) to give a dark-green manganate ion which disproportionate to give permanganate as follows.
\(\begin{array}{l}2 MnO _2+4 KOH + O _2 \rightarrow 2 K_2 MnO _4+2 H _2 O \\ 3 K_2 MnO _4+4 H ^{+} \rightarrow 2 KMnO _4+ MnO _2+2 H _2 O \end{array}\)
On heating \(K _2 MnO _4\) decomposes at 513 K to give \(K _2 MnO _4\). Permanganate ion is tetrahedral and diamagnetic
Acidified \(KMnO _4\) acts a strong oxidizing agent which oxidizes oxalic acid, ferrous ions, nitrite ion and iodides.
HCl is not used to make the medium acidic in oxidation reaction of \(KMnO _4\) in acidic medium, because....

Match List I with List ||

List-I	List-II
Complex species	Isomerism
A. \([\text{Co(NH}_3\text{)}_4\text{Cl}_2\text{]}^{+}\)	I. Optical
B. \(\text{cis-[Co(en)}_2\text{Cl}_2\text{]}\)	II. Ionisation
C. \([\text{Co(NH}_3\text{)}_5\text{SO}_4\text{]Br}\)	III. Coordination
D. \([\text{Co(NH}_3\text{)}_6\text{]}[\text{Cr(CN)}_6\text{]}\)	IV. Geometrical

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The area (in sq. units) enclosed by the curve \(y=\frac{1}{2} x|x|\) and the line \(y=x\) is :

Match List - I with List - II.

List - I (Organism)	List - II (Product)
(A) Aspergillus niger	(I) Lactic Acid
(B) Acetobacter aceti	(II) Citric Acid
(C) Lactobacillus	(III) Butyric Acid
(D) Clostridium butylicum	(IV) Acetic Acid

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The shape of \(XeF_6\) is :

\(n _1\) identical capacitors, each of capacitance \(C _1\), are connected in series and charged by a source of potential difference \(3 V . n _2\) identical capacitors, each of capacitance \(C_2\), are connected in parallel and charged by a source of potential difference 2 V . Total energy stored in both the combinations is the same. What is the value of capacitance \(C _2\) in terms of \(C _{ 1 }\) ?

In hydrogen atom light corresponding to the transition \(n=4\) to \(n=2\) falls on cesium metal. The work function of the metal is 1.9 eV . What is the maximum kinetic energy of the photoelectrons emitted?