Which of the following compounds will show highest acidic strength?

The edge lengths of the unit cells in terms of the radius of spheres constituting fcc, bcc \& simple cubic unit cell respectively are:

In the electrochemical series written in the increasing order of reduction potential
(A) The elements which are placed above the hydrogen in the electrochemical series are stronger oxidizing agents.
(B) The elements which are placed above the hydrogen in the electrochemical series are stronger reducing agents.
(C) The elements with the positive electrode potential values lie below the hydrogen in the electrochemical series.
(D) The activity of both the metals and non-metals in the electrochemical series decreases from top to bottom.
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The basicity of \(\text{H}_3\text{PO}_4\) is :

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Nitrogen differs from rest of the members of group 15 due to its small size, high electronegativity, high ionization enthalpy and non-availability of d orbitals. Nitrogen has unique ability to form pa - pa multiple bonds with itself and with other elements having small size and high electronegativity. Heavier elements of this group do not form pa - pr bonds as their atomic orbitals are so large and diffuse that they cannot have effective overlapping.
Arrange the following in decreasing order of their basic strength :
A. PH3 \(_3\)
B. \(AsH _3\)
C. \(NH _3\)
D. \(SbH _3\)
E. \(BiH _3\)
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Arrange the following oxides in the order of their basic strength:
(A) \(V_2O_5\)
(B) \(V_2O_3\)
(C) \(V_2O_4\)
(D) \(Mn_2O_7\)
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Match List I with List II

LIST - I	LIST - II
A. \(\text{} C_6H_5CHO\)	I. Precipitation with 2,4 DNP
B. \(CH_3C \equiv CH\)	II. Precipitation with AgNO3 (ammoniacal)
C. \(HCN\)	III. Nucleophile
D. \((\wedge-1)\)	IV. Cyanohydrin formation

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Select the properties of cancer cell
(A) Forms benign tumors
(B) Causes very little damage to the surrounding tissues
(C) Can show Metastasis
(D) Lacks contact inhibition

Arrange the given geological periods according to their occurrence from oldest to latest order?
(A) Devonian
(B) Cretaceous
(C) Triassic
(D) Carboniferous
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During allergic reactions, which of the followings are secreted?
(A) Histamines
(B) Interferons
(C) Serotonin
(D) Pyrogens
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A money lender charges Rs 10 for Rs 100 per month in advance then effective rate of interest per annum charged by money lender is : \(\left[\right.\) given \(\left.\left(\frac{10}{9}\right)^{12}=3.541\right]\)

A conductor of length ' \(L\) ' is connected to a battery of emf ' \(E\) '. The drift velocity of electron in the conductor is ' \(v_d^{\prime}\). The drift velocity of electron in the conductor on stretching it four times, to length 4 L keeping emf ' \(E\) ' constant will be :

Match List - I with List - II.

List - I	List - II
(A) Insulin	(I) Carbohydrate metabolism
(B) Glucocorticoids	(II) Controls blood sugar level
(C) Mineralocorticoids	(III) Low level of thyroxine
(D) Hypothyroidism	(IV) Control levels of excretion of salt

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