For the equimolal solutions, increasing order of osmotic pressure is
A. 1 m C 6 H 5 COOH
B. 1 m BaCl 2
C. 1 m KCl
D. 1 m glucose
E. \(1 m H3PO4\)
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Number of unpaired electrons in the square planar [Pt(CN)₄]^2- are :

Question: In the complex ion \(\left[ Fe \left( C _2 O _4\right)_3\right]^{3-}\), the coordination number of Fe is:

Ethyl alcohol can be prepared from the following set of reactants and subsequent hydrolysis of adduct :

Arrange the following complexes in increasing order of number of moles of silver chloride precipitated
when one mole of each is reacted with excess of silver nitrate.
(A) \(\left[ Co \left( NH _3\right)_4 Cl _2\right] Cl\)
(B) \(\left[ Co \left( NH _3\right)_5 Cl \right] Cl _2\)
(C) \(\left[ Co \left( NH _3\right)_3 Cl _3\right]\)
(D) \(\left[ Co \left( NH _3\right)_6\right] Cl _3\)
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Answer the question on basis of passage given below :
Transition metals form a large number of complexes or coordination compounds in which the metal atoms are bound to a number of anions or neutral molecules. The valence bond theory explain the formation, magnetic behaviour and geometrical shapes while the crystal field theory explains the effect of different crystal fields on the degeneracy of d-orbitals energies of the central metal atom/ion. This provides for the quantitative estimation of orbital separation energies, magnetic moments and spectral and stability parameters.

List - I	List - II
A. Mn2+	I. Yellow
B. \(F e 3+\)	II. Green
C. \(N i 2+\)	III. Blue
D. \(Cu 2+\)	IV. Pink

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The conductivity of electrolytic solutions does not depend upon

Arrange the following compounds in decreasing order of their boiling points:
A. Ethoxyethane
B. n-Butane
C. Pentanal
D. Pentan-1-ol
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What is the wavelength of light for the least energetic photon emitted in the Lyman series of the hydrogen atom spectrum lines ?
(Take \( h = 6.63 \times 10^{-34} \text{ Js} \); \( c = 3 \times 10^8 \text{ ms}^{-1} \); \( e = 1.6 \times 10^{-19} \text{ C} \))

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Look at the following chemical reactions and answer the following question :
(A) \(C_7H_8 \xrightarrow{\text{Conc. HNO}_3, 0^\circ C}
(B) \xrightarrow{Sn/HCl}
(C) \xrightarrow{NaNO_2/H_3O^+}
(D) \xrightarrow{H_2O, Heat} (E)\)
(E) \(CH_3I \xrightarrow{KMnO_4/H^+}
(F) \xrightarrow{H_3O^+} (G) \xrightarrow{NaOH} (H)\)
Which of the following compounds will undergo coupling reaction ?

Rolle's theorem holds for the function \(x^3+b x^2+c x, 1 \leq x \leq 2\) at the point \(\frac{4}{3}\), the respective values of \(b\) and \(c\) are :

Match List - I with List - II.

List - I	List - II
(A) Orbital radius of electron	(I) \( \propto \frac{1}{n} \)
(B) Orbital velocity of electron	(II) \( \propto n \)
(C) Orbital frequency of electron	(III) \( \propto \frac{1}{n^3} \)
(D) Angular momentum of electron List	(IV) \( \propto n^2 \)

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BOD values of three water samples A, B and C were recorded as 20 mg/L, 10 mg/L and 50 mg/L. Which of the sample is/are the most polluted?