1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

$$a \mathrm{MnO}_4^{-}+b \mathrm{~S}_2 \mathrm{O}_3^{2-}+\mathrm{H}_2 \mathrm{O} \longrightarrow x \mathrm{MnO}_2 +y \mathrm{SO}_4^{2-}+z \mathrm{OH}^{-}$$

$$a$$ and $$y$$ respectively are

A
8 ; 3
B
8 ; 6
C
3 ; 6
D
8 ; 8
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

Which formula and name combination is incorrect?

A
$$\mathrm{K}_3\left[\mathrm{Al}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$$ - Potassium trioxalatoaluminate (III)
B
$$\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}\left(\mathrm{NO}_2\right)\right]$$ - Diamminechloridonitrito - N-platinum (II)
C
$$\left[\mathrm{CoCl}_2(\mathrm{en})_2\right] \mathrm{Cl}-$$ Dichloridodiethylenediammine cobalt (II) chloride
D
$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{Cl}\right] \mathrm{Cl}_2-$$ Tetraammineaquachloridocobalt (III) chloride
3
KCET 2023
MCQ (Single Correct Answer)
+1
-0

Which of the following system in an octahedral complex has maximum unpaired electrons?

A
$$d^9$$ (high spin)
B
$$d^6$$ (low spin)
C
$$d^4$$ (low spin)
D
$$d^7$$ (high spin)
4
KCET 2023
MCQ (Single Correct Answer)
+1
-0

The correct decreasing order of basicity of hydrides of group- 15 elements is

A
$$\mathrm{SbH}_3>\mathrm{AsH}_3>\mathrm{PH}_3>\mathrm{NH}_3$$
B
$$\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3>\mathrm{NH}_3$$
C
$$\mathrm{AsH}_3>\mathrm{SbH}_3>\mathrm{NH}_3>\mathrm{PH}_3$$
D
$$\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3$$
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