1
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

The most effective water softening method is

A

lime - soda process

B

permutit process

C

ion - exchange process

D

boiling followed by filtration

2
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Potassium superoxide on hydrolysis gives

A

$\mathrm{K}^{+}+\mathrm{OH}^{-}+\mathrm{O}_2$

B

$\mathrm{K}^{+}+\mathrm{K}_2 \mathrm{O}+\mathrm{O}_2+\mathrm{OH}^{-}$

C

$\mathrm{K}^{+}+\mathrm{H}_2 \mathrm{O}_2+\mathrm{O}_2+\mathrm{OH}^{-}$

D

$\mathrm{K}^{+}+\mathrm{H}_2 \mathrm{O}_2+\mathrm{OH}^{-}$

3
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

When aluminium chloride is dissolved in water, it gives

A

$\left[\mathrm{Al}(\mathrm{OH})_6\right]^{3-}+3 \mathrm{HCl}$

B

$\mathrm{Al}_2 \mathrm{O}_3+6 \mathrm{HCl}$

C

$\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}+3 \mathrm{Cl}^{-}$

D

$\mathrm{Al}^{3+}+3 \mathrm{Cl}^{-}$

4
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Among the following given substances, the one with zero $\Delta_f H^{\circ}$ is

A

diamond

B

graphite

C

fullerene

D

bituminous coal

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