${\mathrm{FeCl}}_3.6{\mathrm{H}}_2\mathrm{O}+\mathrm{C} {\left({\mathrm{CH}}_3\right)}_2{\left({\mathrm{CH}}_3\mathrm{O}\right)}_2\to \mathrm{Products}$

Reaction products are :

(A) ${\mathrm{FeCl}}_3, {\mathrm{CH}}_3\mathrm{OH} \mathrm{and} {\mathrm{CH}}_3{\mathrm{COCH}}_3$                       

(B) $\left({\mathrm{CH}}_3\mathrm{O}\right)\mathrm{Fe}, \mathrm{HCl} \mathrm{and} {\mathrm{H}}_2\mathrm{O}$

(C) ${\mathrm{FeCl}}_2, \mathrm{HCl} \mathrm{and} {\mathrm{CH}}_3{\mathrm{COCH}}_3$                             

(D) $\mathrm{Fe}{\left(\mathrm{OH}\right)}_3, {\mathrm{FeCl}}_3 \mathrm{and} {\mathrm{CH}}_3{\mathrm{COCH}}_3$

The highest negative $\left(\raisebox{1ex}{${\mathrm{M}}^{2+}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{M}$}\right.\right)$ standard electrode potential  among the following is :

Excess of Kl reactions with ${\mathrm{CuSO}}_4$ solution and ${\mathrm{Na}}_2{\mathrm{SO}}_4$ solution is added to it. Which of the following statement is incorrect for this reaction ?

Select the correct statement :

The yellow colour solution of ${\mathrm{Na}}_2{\mathrm{CrO}}_4$ changes to orange-red on passing ${\mathrm{CO}}_2$ gas due to the formation of :

${\mathrm{FeCr}}_2{\mathrm{O}}_4+4{\mathrm{Na}}_2{\mathrm{CO}}_3+{\mathrm{O}}_2\stackrel{\mathbf{Fusion}}{\to }\left[\mathbf{X}\right]\underset{ \mathbf{ }\mathbf{ }{\mathbf{H}}_{\mathbf{2}}\mathbf{O}\mathbf{ } }{\overset{{\mathbf{H}}^{\mathbf{+}}}{\to }}\left[\mathbf{Y}\right]\underset{{\mathbf{H}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{2}}}{\overset{{\mathbf{H}}^{\mathbf{+}}}{\to }}\left[\mathbf{Z}\right]$

Which of the following statements is true for the compounds [X], [Y] and [Z] ?

(A) In all three compounds, the chromium is in +6 oxidation states.

(B) [Z] is a deep blue-violet coloured compound which decomposes rapidly in aqueous solution into

      ${\mathrm{Cr}}^{3+}$ and dioxygen.

(C) Saturated solution of [Y] gives a bright orange compound, chromic anhydride, with concentrated

      ${\mathrm{H}}_2{\mathrm{SO}}_4.$

(D) All of these

${\mathrm{KMnO}}_4$ on treatment with conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ forms a compound (X) which decomposes explosively on heating forming (Y). The (X) and (Y) are respectively :

Which of the following products are formed when potassium bromide reacts with potassium permanganate in alkaline pH?

Assertion : The number of unpaired electrons in the following gaseous ions:

                   ${\mathrm{Mn}}^{3+}, {\mathrm{Cr}}^{3+}, {\mathrm{V}}^{3+} \mathrm{and} {\mathrm{Ti}}^{3+}$are 4, 3, 2 and 1 respectively

Reason : ${\mathrm{Cr}}^{3+}$ is stable in aqueous solution.

Assertion : Cuprous ion $\left({\mathrm{Cu}}^{+}\right)$ is colourless whereas cupric ion $\left({\mathrm{Cu}}^{2+}\right)$ produces blue colour in solution.

Reason : Cuprous ion $\left({\mathrm{Cu}}^{+}\right)$ has unpaired electrons while cupric ion $\left({\mathrm{Cu}}^{2+}\right)$ does not.

Assertion : Ammonical silver nitrate converts glucose to gluconic acid and metallic silver is precipitated.

Reason : Glucose acts as a weak reducing agent.

Assertion: To a solution of potassium chromate if a strong acid is added it changes its colour from yellow to orange.

Reason : The colour change is due to the oxidation of potassium chromate.

Which one of the following statements is not correct

Which of the following pairs of compounds are more stable

The radius of La³⁺ (atomic number of La=57) is 1.06 $\stackrel{o}{A}$. Which one of the following given values will be closest to the radius of Lu³⁺ (atomic number of Lu =71)

Match the underlined atom in Column A with oxidation number in Column B.

                    A                                                          B

(a)  [Fe(CN)₅$\stackrel{\oplus }{N}$O]^2-                                                0(I)

(b)  [Ag(CN)₂]^-                                                      3(II)

(c)  [Cr(en)₃]³⁺                                                      1(III)

(d)  Ni(CO)₄                                                          2(IV)

              a         b        c       d

(A)         I         II       III      IV

(B)        II        III       IV       I

(C)       IV        III       II        I

(D)       II        III        I        IV

By calculating E^o value of the following reaction,which one of the following reaction are spontaneous.

Given 

$$\begin{gathered} E_{C{u}^{2+}/Cu}^o=0.34 V,E_{Z{n}^{2+}/Zn}^o=-0.76 V, E_{A{g}^{+}/Ag}^o=0.80 V. \\ \left(a\right) 2Ag +Z{n}^{2+}\to 2A{g}^{+}+Zn \\ \left(b\right)Cu +Z{n}^{2+}\to Zn +C{u}^{2+} \\ \left(c\right) Zn +C{u}^{2+}\to Z{n}^{2+}+Cu \\ \left(d\right) 2A{g}^{+}+Cu \to 2Ag+C{u}^{2+} \end{gathered}$$

(A) Only d

(B) Only b

(C) Both c & d

(D) Both a & c

Which of the following has maximum number of unpaired electrons?

The atomc number of potassium is 19 & that of manganese is 25. Although the colour of MnO₄^- is dark violet yet the K⁺ is colourless.This is due to the fact that

Heating of Ag with dil. HNO₃ give

Zinc dissolve in an excess of NaOH, because of the formation of

When excess of SnCl₂ is added to HgCl₂, the substance formed is

The oxidation number is changed in which of the following case

Which of the following elements form stable dinuclear ions

The correct electronic configuration of Ti(Z=22 atom) is

Of the ions, Zn²⁺, Ni²⁺and Cr³⁺(atomic number of Zn =30, Ni=28 and Cr=24).

Assertion: Transition metals have high boiling points and high enthalpy of atomization.

Reason: The transition metals occur in bcc, hcp or ccp structures charcterstics of metals.

Assertion: Zn, Cd and Hg are normally not considered transition metals.

Reason: d-orbitals in above elements are completely filled, hence above metals do not show the general charcterstic properties of the transition elements.

Assertion :A transition metal forms alloy with other transition metal easily.

Reason: The transition metals have similar electronic configuration,nearly equal radii and exhibit similar packing in their lattices.

Assertion : Anhydrous copper(II) chloride is a covalent while anhydrous copper(II)fluoride is ionic in nature.

Reason: In halides of transition metals, the ionic character decreases with increase in atomic mass of the halogen.