MCQ
How many geometrical isomers are possible for the above compound ?


- ✓$0$
- B$2$
- C$3$
- D$4$


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$Z$ is

$(A)$ $\left[ Ni \left( H _{2} O \right)_{2}( en )_{2}\right]^{2+}$
$(B)$ $\left[ Ni \left( H _{2} O \right)_{4}(\text { en })\right]^{2+}$ and
$(C)$ $\left[ Ni ( en )_{3}\right]^{2+}$ is ...... .

$2NH_3 + 5F_2\,\,\to \,\, N_2F_4 + 6HF$
$\ln k=33.24-\frac{2.0 \times 10^{4} \,K }{ T }$
The Activation energy for the reaction is given by $...\,k\,\,J mol ^{-1}$. (In Nearest integer)
(Given: $R =8.3\, J\, K ^{-1} \,mol ^{-1}$ )
Ibuprofen is