AMU BSc PYQ 2026 | AMU BSc Previous Year Question with explanation

41. Among the following, the compound with lowest lattice energy is :

(a) $Al_2O_3$

(b) MgO

(c) NaF

(d) $CaF_2$

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42. The compound $[Co(NH_3)_5NO_2]Cl_2$ shows ______ isomerism.

(a) coordination

(b) linkage

(c) Ionization

(d) hydrate

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43. Which of the following has highest magnetic moment?

(a) $[CoCl_4]^{2-}$

(b) $[Cu(NH_3)_4]^{2+}$

(c) $[Ni(CN)_4]^{2-}$

(d) $TiCl_4$

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44. Among $NF_3$, $BF_3$ and $H_3O^+$, iso structural are :

(a) $NF_3$ and $BF_3$

(b) $BF_3$ and $H_3O^+$

(c) $NF_3$ and $H_3O^+$

(d) $NF_3$, $BF_3$ and $H_3O^+$

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45. An important ore of magnesium is:

(a) Malachite

(b) Carnallite

(c) Galena

(d) Cassiterite

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