1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

$$\mathrm{H}_2 \mathrm{O}_2$$ is obtained by which of the following?

A
$$\mathrm{BaO}_2$$
B
$$\mathrm{MnO}_2$$
C
$$\mathrm{SeO}_2$$
D
$$\mathrm{TeO}_2$$
2
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Which has least covalent radius?

A
Mn
B
Cu
C
Zn
D
Ni
3
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Which give coloured carbonate precipitate?

A
$$\mathrm{Hg}_2^{2+}$$
B
$$\mathrm{Sr}^{+2}$$
C
$$\mathrm{Bi}^{+3}$$
D
$$\mathrm{Li}^{+}$$
4
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Which of the following, number of lone pair at central atom zero $$\mathrm{XeO}_3, \mathrm{XeO}_2 \mathrm{~F}_2, \mathrm{XeO}_4, \mathrm{XeO}_3 \mathrm{~F}_2, \mathrm{XeF}_6$$ ?

A
2
B
3
C
4
D
Zero
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