Which transition metal ion is most stable against oxidation to its +3 state?

Which reagent will distinguish Benzophenone from acetone ?

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There are three kinds of amines which are primary, secondary and tertiary amines. These amines may have alkyl group or aryl group or both alkyl and aryl groups. These amines can be distinguished from one another by various chemical tests.
An amine A on treatment with \(\text{HNO}_2\) gives \(\text{N}_2\text{(g)}\) and an alcohol B. The molecular mass of alcohol B is 46.
The amine A is :

Match List-I (Name) with List-II (Solution)

List-I (Name)	List-II (Solution)
(A) Isotonic solution	(I) A solution with lower osmotic pressure than that of other solution
(B) Hypotonic solution	(II) A solution with higher osmotic pressure than that of other solution
(C) Ideal solution	(III) Different solutions with equal osmotic pressure
(D) Hypertonic solution	(IV) A solution that obeys Raoult's law at all temperatures and concentration

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The order of increasing boiling point for the following compounds is
(A) \(CH_3CH_2CH_2CH_3\)
(B) \(CH_3CH_2CH_2CH_2OH\)
(C) \(C_2H_5OC_2H_5\)
(D) \(CH_3CH_2CH_2CHO\)
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An element has a cubic close packing (ccp) structure with an edge length 297 pm . The density of mass \(=107.9 g / mol\).)
the element is (Given molar mass = \(107.9 g / mol\).)

Answer the question on the basis of passage given below:
In the periodic table, the d-block contains the elements of group \(3\) to \(12\). The d-orbitals are progressively filled in each of the four long periods. The elements of d block referred as transition metals have partly filled d orbitals and exhibit certain characteristic properties such as variety of oxidation states, formation of coloured ions, act as catalyst and show paramagnetic behaviour.
The two inner transition metals series \(4f\) and \(5f\) are known as Lanthanoids and Actinoids respectively. The lanthanoids resemble one another more closely as compared to ordinary transition elements in any series.
The bonds present in the structure of dichromate ion are:

In a transformer, the input current and voltage are 3 A and 50 V respectively. The ratio of the number of turns in the primary coil to secondary coil is 5 : 3. The output current and voltage, respectively, are

Match List-l with List-ll

List-I (Terms)	List-II (Features)
(A) Spermatogenesis	(I) Nutrition to germ cells
(B) Acrosome	(II) Testicular hormones
(C) Leydig's cells	(III) Penetration of sperm
(D) Sertoli cells	(IV) Formation of sperms

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Match List - I with List - II.

List - I	List - II
(A) Transgenic mice	(I) Hereditary disease
(B) PCR	(II) Safety of Polio vaccine
(C) Golden rice	(III) Molecular Diagnosis
(D) Gene Therapy	(IV) Enhanced nutritional value

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Which of the following is NOT an Intra Uterine Device ?

The minimum concentration of an electrolyte in millimoles per litre which is required to cause the precipitation of a sol in two hours is called as:

If A is an invertible symmetric matrix, then \(A^{-1}\) is