1
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

In leaching of alumina from bauxite by Bayer's process, then ore is treated with

A
$\mathrm{NaOH}(a q)$
B
$\mathrm{NaCN}(a q)$
C
$\mathrm{KCN}(a q)$
D
$\mathrm{Na}_2 \mathrm{CO}_3(\mathrm{aq})$
2
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The diagonal relationship in Be and Al is due to

A
similar ionisation enthalpy
B
similar metallic character
C
similar ionic size and charge/radius ratio
D
similar electronegativity
3
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Carbolic acid is oxidised by acidified sodium dichromate to give

A
acetone
B
ethyl methyl ketone
C
benzoquinone
D
anthraquinone
4
MHT CET 2019 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The highest oxidation state in plutonium (At. no. $=94$) is

A
+6
B
+4
C
+5
D
+7
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