Question 1 :
The correct order of hybridization of the central atom in the following species {tex} \mathrm { NH } _ { 3 } , \left[ \mathrm { PtCl } _ { 4 } \right] ^ { 2 - } {/tex}, {tex} \mathrm { PCl } _ { 5 } {/tex} and {tex} \mathrm { BCl } _ { 3 } {/tex} is :

Question 2 :
What is the coordination number of central metal atom in {tex} \left[ \mathrm { Pt } \left( \mathrm { NH } _ { 3 } \right) _ { 2 } \mathrm { Cl } _ { 2 } \right] \mathrm { Cl } {/tex} ?

Question 3 :
In {tex} \mathrm { Fe } ( \mathrm { CO } ) _ { 5 } , {/tex} the Fe-C bond possesses :

Question 4 :
Among the following coordination compounds, the one giving a white precipitate with BaCl{tex} _ { 2 } {/tex} solution is :

Question 5 :
Which is not true about the coordination compound {tex} \left[ \mathrm { Co } ( \mathrm { en } ) _ { 2 } \mathrm { Cl } _ { 2 } \right] \mathrm { Cl } {/tex} ?

Question 6 :
In the complexes {tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } {/tex} and {tex} \left[ \mathrm { Pt } ( \mathrm { en } ) \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 2 } \left( \mathrm { NO } _ { 2 } \right) ( \mathrm { Cl } ) \right] ^ { 2 + } {/tex} the respective oxidation numbers of central metal atoms are :

Question 7 :
The geometry of {tex} \mathrm { Ni } ( \mathrm { CO } ) _ { 4 } {/tex} and {tex} \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] ^ { 2 - } {/tex} are :

Question 8 :
The hybridization of the iron atom in {tex} \left[ \mathrm { Fe } ( \mathrm { CN } ) _ { 6 } \right] ^ { - 3 } {/tex} complex is :

Question 9 :
The complex ion {tex} \left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] ^ { 2 - } {/tex} is :

Question 12 :
What is the oxidation number of central atom in {tex} \mathrm { Na } \left[ \mathrm { Hg } ( \mathrm { CN } ) _ { 2 } \right] ? {/tex}

Question 14 :
Which of the following statement about primary and secondary valencies is true?

Question 15 :
The IUPAC name for the complex {tex} \left[ \mathrm { Co } \left( \mathrm { NO } _ { 2 } \right) \left( \mathrm { NH } _ { 3 } \right) _ { 5 } \right] \mathrm { Cl } _ { 2 } {/tex} is :

Question 17 :
Which of the following is not a condition for complex salt formation ?

Question 21 :
Which element among the lanthanoids has the smallest atomic radius ?

Question 26 :
Which compound of chromium is widely used in tanning of leather ?

Question 27 :
Ammonium dichromate is use in some fireworks. The green coloured powder blown in air is :

Question 28 :
Which of the following metal is used in incandescent lamps ?

Question 29 :
Which one of the following does not show different oxidation states ?

Question 30 :
Which of the following oxides of chromium is amphoteric in nature ?

Question 31 :
Number of moles of K{tex}_2{/tex}Cr{tex}_2{/tex}O{tex}_7{/tex} reduced by one mole of Sn{tex}^{2+}{/tex} ions is :