1. Which of the following is amphoteric oxide?
$$M{n_2}{O_7},Cr{O_3},C{r_2}{O_3},CrO,{V_2}{O_5},{V_2}{O_4}$$

A. $${V_2}{O_5},C{r_2}{O_3}$$
B. $$M{n_2}{O_7},Cr{O_3}$$
C. $$CrO,{V_2}{O_5}$$
D. $${V_2}{O_5},{V_2}{O_4}$$
Answer :   $${V_2}{O_5},C{r_2}{O_3}$$
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2. The outer electron configuration of $$Gd\left( {Atomic\,No.:64} \right)\,{\text{is}}:$$

A. $$4{f^3}5{d^5}6{s^2}$$
B. $$4{f^8}5{d^0}6{s^2}$$
C. $$4{f^4}5{d^4}6{s^2}$$
D. $$4{f^7}5{d^1}6{s^2}$$
Answer :   $$4{f^7}5{d^1}6{s^2}$$
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3. The stability of dihalides of $$Si,Ge,Sn$$   and $$Pb$$  increases steadily in the sequence

A. $$Pb{X_2} < < Sn{X_2} < < Ge{X_2} < < Si{X_2}$$
B. $$Ge{X_2} < < Si{X_2} < < Sn{X_2} < < Pb{X_2}$$
C. $$Si{X_2} < < Ge{X_2} < < Pb{X_2} < < Sn{X_2}$$
D. $$Si{X_2} < < Ge{X_2} < < Sn{X_2} < < Pb{X_2}$$
Answer :   $$Si{X_2} < < Ge{X_2} < < Sn{X_2} < < Pb{X_2}$$
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4. The common oxidation states of $$Ti$$  are

A. +2, +3
B. +3, +4
C. 3, -4
D. +2, +3, +4
Answer :   +3, +4
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5. Calomel$$\left( {H{g_2}C{l_2}} \right)$$   on reaction with ammonium hydroxide gives

A. $$HgO$$
B. $$H{g_2}O$$
C. $$N{H_2} - Hg - Hg - Cl$$
D. $$Hg\,N{H_2}\,Cl$$
Answer :   $$Hg\,N{H_2}\,Cl$$
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6. Which of the following statements is correct about stability of the complexes of lanthanoids?

A. Stability of complexes increases as the size of lanthanoid decreases.
B. Stability of complexes decreases as the size of lanthanoid decreases.
C. Lanthanoids do not form complexes.
D. All the complexes of lanthanoids have same stability.
Answer :   Stability of complexes increases as the size of lanthanoid decreases.
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7. Which of the following statements is not correct?

A. $$La{\left( {OH} \right)_3}$$  is less basic than $$Li{\left( {OH} \right)_3}$$
B. In lanthanide series, ionic radius of $$L{n^{3 + }}$$  $$ion$$  decreases
C. $$La$$  is actually an element of transition series rather lanthanide
D. Atomic radius of $$Zr$$  and $$Hf$$  are same because of lanthanide contraction
Answer :   $$La{\left( {OH} \right)_3}$$  is less basic than $$Li{\left( {OH} \right)_3}$$
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8. Which of the following ions will exhibit colour in aqueous solutions?

A. $$L{a^{3 + }}\left( {Z = 57} \right)$$
B. $$T{i^{3 + }}\left( {Z = 22} \right)$$
C. $$L{u^{3 + }}\left( {Z = 71} \right)$$
D. $$S{c^{3 + }}\left( {Z = 21} \right)$$
Answer :   $$T{i^{3 + }}\left( {Z = 22} \right)$$
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9. Which of the following arrangements does not represent the correct order of the property stated against it?

A. $$Sc < Ti < Cr < Mn:$$     number of oxidation states
B. $${V^{2 + }} < C{r^{2 + }} < M{n^{2 + }} < F{e^{2 + }}:$$       paramagnetic behaviour
C. $$N{i^{2 + }} < C{o^{2 + }} < F{e^{2 + }} < M{n^{2 + }}:$$       ionic size
D. $$C{o^{3 + }} < F{e^{3 + }} < C{r^{3 + }} < S{c^{3 + }}:$$       stability in aqueous solution
Answer :   $${V^{2 + }} < C{r^{2 + }} < M{n^{2 + }} < F{e^{2 + }}:$$       paramagnetic behaviour
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10. A metal $$M$$  and its compound can give the following observable changes in a consequence of reactions
$$\eqalign{ & M\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{HN{O_3}}^{{\rm{dilute}}}} \left[ \matrix{ {\rm{Colourless}} \hfill \cr {\rm{solutions}} \hfill \cr} \right]\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{NaOH}^{{\rm{aqueous}}}} \left[ \matrix{ {\rm{White}} \hfill \cr {\rm{precipitate}} \hfill \cr} \right] \cr & \left[ \matrix{ {\rm{White}} \hfill \cr {\rm{precipitate}} \hfill \cr} \right]\buildrel {{H_2}S} \over \longrightarrow \left[ \matrix{ {\rm{Colourless}} \hfill \cr {\rm{solutions}} \hfill \cr} \right]\mathrel{\mathop{\kern0pt\longleftarrow} \limits_{NaOH\left( {aq.} \right)}^{{\rm{excess}}}} \cr} $$

A. $$Mg$$
B. $$Pb$$
C. $$Zn$$
D. $$Sn$$
Answer :   $$Zn$$
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