A chloride salt solution acidified with dil.HNO$${}_3$$ gives a curdy white precipitate, [A], on addition of AgNO$${}_3$$. [A] on treatment with NH$${}_4$$OH gives a clear solution B. A and B are respectively :

Which one amongst the following are good oxidizing agents? A. Sm$${}^{2+}$$ B. Ce$${}^{2+}$$ C. Ce$${}^{4+}$$ D. Tb$${}^{4+}$$ Choose the most appropriate answer from the options given below :

An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is :

The pair of lanthanides in which both elements have high third - ionization energy is :

Given below are two statement: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$ Assertion A: $$5\mathrm{f}$$ electrons can participate in bonding to a far greater extent than $$4\mathrm{f}$$ electrons Reason R: $$5\mathrm{f}$$ orbitals are not as buried as $$4\mathrm{f}$$ orbitals In the light of the above statements, choose the correct answer from the options given below

Prolonged heating is avoided during the preparation of ferrous ammonium sulphate to :

Which of the following statements are correct? (A) The M$${}^{3+}$$/M$${}^{2+}$$ reduction potential for iron is greater than manganese. (B) The higher oxidation states of first row d-block elements get stabilized by oxide ion. (C) Aqueous solution of Cr$${}^{2+}$$ can liberate hydrogen from dilute acid. (D) Magnetic moment of V$${}^{2+}$$ is observed between 4.4 - 5.2 BM. Choose the correct answer from the options given below :

Which halogen is known to cause the reaction given below : $$2{\mathrm{Cu}}^{2+}+4{\mathrm{X}}^{-}\to {\mathrm{Cu}}_2{\mathrm{X}}_2(\mathrm{s})+{\mathrm{X}}_2$$

In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of $$\mathrm{Ti}:22,\mathrm{V}:23,\mathrm{Cr}:24,\mathrm{Mn}:25,\mathrm{Fe}:26$$ )

Strong reducing and oxidizing agents among the following, respectively, are :

Element not present in Nessler's reagent is :

Given below are two statements: one is labelled as "Assertion A" and the other is labelled as "Reason R" Assertion A : In the complex $$\mathrm{Ni}(\mathrm{CO}{)}_4$$ and $$\mathrm{Fe}(\mathrm{CO}{)}_5$$, the metals have zero oxidation state. Reason R : Low oxidation states are found when a complex has ligands capable of $$\pi$$-donor character in addition to the $\sigma$-bonding. In the light of the above statements, choose the most appropriate answer from the options given below

During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.

$$\mathrm{O}-\mathrm{O}$$ bond length in $${\mathrm{H}}_2{\mathrm{O}}_2$$ is $$\underline{\mathrm{X}}$$ than the $$\mathrm{O}-\mathrm{O}$$ bond length in $${\mathrm{F}}_2{\mathrm{O}}_2$$. The $$\mathrm{O}-\mathrm{H}$$ bond length in $${\mathrm{H}}_2{\mathrm{O}}_2$$ is $$\underline{Y}$$ than that of the $$\mathrm{O}-\mathrm{F}$$ bond in $${\mathrm{F}}_2{\mathrm{O}}_2$$. Choose the correct option for $$\underline{X}$$ and $$\underline{Y}$$ from those given below :

Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} List I List II A. $$\mathrm{Xe}{\mathrm{F}}_4$$ I. See-saw B. $$\mathrm{S}{\mathrm{F}}_4$$ II. Square-planar C. $$\mathrm{N}{\mathrm{H}}_4^{+}$$ III. Bent T-shaped D. $$\mathrm{Br}{\mathrm{F}}_3$$ IV. Tetrahedral Choose the correct answer from the options given below :

For $${\mathrm{OF}}_2$$ molecule consider the following : A. Number of lone pairs on oxygen is 2 . B. FOF angle is less than $$104.5^{\circ }$$. C. Oxidation state of $$\mathrm{O}$$ is $$-2$$. D. Molecule is bent '$$\mathrm{V}$$' shaped. E. Molecular geometry is linear. correct options are:

Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} List I (molecules/ions) List II (No. of lone pairs of e$${}^{-}$$ on central atom) A. $$\mathrm{I}{\mathrm{F}}_7$$ I. Three B. $$\mathrm{ICl}$$$${}_4^{-}$$ II. One C. $$\mathrm{Xe}{\mathrm{F}}_6$$ III. Two D. $$\mathrm{Xe}{\mathrm{F}}_2$$ IV. Zero Choose the correct answer from the options given below :

According to MO theory the bond orders for $$\mathrm{O}$$$${}_2^{2-}$$, $$\mathrm{CO}$$ and $$\mathrm{N}{\mathrm{O}}^{+}$$ respectively, are

The magnetic behaviour of $$\mathrm{L}{\mathrm{i}}_2\mathrm{O},\mathrm{N}{\mathrm{a}}_2{\mathrm{O}}_2$$ and $$\mathrm{K}{\mathrm{O}}_2$$, respectively, are :

The bond dissociation energy is highest for