1
JEE Advanced 2021 Paper 1 Online
Numerical
+4
-0
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The total number of possible isomers for [Pt(NH3)4Cl2]Br2 is ______.
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2
JEE Advanced 2019 Paper 2 Offline
Numerical
+3
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Total number of $$cis\,N - Mn - Cl$$ bond angles (that is $$Mn - N$$ and $$Mn - Cl$$ bonds in cis positions) present in a molecule of $$cis[Mn{(en)_2}C{l_2}]$$ complex is ..................

(en = NH2CH2CH2NH2)
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3
JEE Advanced 2018 Paper 1 Offline
Numerical
+3
-0
The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by $$NiCl{}_2.6{H_2}O$$ to form a stable coordination compound. Assume that both the reactions are $$100\% $$ complete. If $$1584$$ $$g$$ of ammonium sulphate and $$952\,g$$ of $$NiC{l_2}.6{H_2}O$$ are used in the preparation, the combined weight (in grams) of gypsum and the nickel-ammonia coordination compound thus produced is _____________.

(Atomic weights in $$g$$ $$mo{l^{ - 1}}:$$ $$H = 1,N = 14,O = 16,$$ $$S = 32,Cl = 35.5,$$ $$Ca = 40,$$ $$Ni = 59$$
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4
JEE Advanced 2017 Paper 1 Offline
Numerical
+3
-0
The sum of the number of lone pairs of electrons on each central atom in the following species is

$${[TeB{r_6}]^{2 - }},{\left[ {Br{F_2}} \right]^ + },SNF_3,$$ and $${\left[ {Xe{F_3}} \right]^ - }$$

(Atomic numbers: $$N = 7,F = 9,$$ $$S = 16,Br = 35,$$ $$Te = 52,Xe = 54$$)
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