1
TS EAMCET 2023 (Online) 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

What are the correct statements about the elements of group 13 given below?

(I) The stability of +1 oxidation state follows the order $\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}$.

(II) Boron has the lowest melting point and boiling point as it is a non-metal.

(III) Boron shows a maximum covalency of 4 in its compounds.

(IV) The order of atomic radius is $\mathrm{Ga}>\mathrm{Al}>\mathrm{In}$.

(V) Aluminium is passive to concentrated nitric acid.

A
I, III and V only
B
II, IV and V only
C
I, II and IV only
D
III, IV and V only
2
TS EAMCET 2023 (Online) 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Consider the reaction,

$$ \mathrm{P}_4+3 \mathrm{NaOH}+3 \mathrm{H}_2 \mathrm{O} \longrightarrow Q+3 \mathrm{NaH}_2 \mathrm{PO}_2 $$

Identify the reaction in which $Q$ is not the product. (equations are not balanced)

A
$\mathrm{Ca}_3 \mathrm{P}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow$
B
$\mathrm{H}_3 \mathrm{PO}_3 \xrightarrow{\Delta}$
C
$\mathrm{PH}_4 \mathrm{I}+\mathrm{KOH} \longrightarrow$
D
$\mathrm{PCl}_3+\mathrm{H}_2 \mathrm{O}$
3
TS EAMCET 2023 (Online) 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The oxidation state of sulphur atoms and numbers of $\mathrm{S}-\mathrm{OH}$ bonds in peroxydisulphuric acid are respectively
A
$(+6,+5), 2$
B
$(+6,+6), 4$
C
$(+6,+6), 2$
D
$(+5,+5), 4$
TS EAMCET Subjects
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