1
TG EAPCET 2025 (Online) 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Consider a general first order reaction,

$$ A(g) \longrightarrow B(g)+C(g) $$

If the initial pressure is 200 mm and after 20 minutes it is 250 mm , then the half-life period of the reaction (in minutes) is ( $\log 2=0.30, \log 3=0.48, \log 4=0.60$ )

A

40.2

B

50.2

C

20.5

D

60.5

2
TG EAPCET 2025 (Online) 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The most effective coagulating agent for antimony sulphide sol is

A

$\mathrm{Na}_2 \mathrm{SO}_4$

B

$\mathrm{CaCl}_2$

C

$\mathrm{NH}_4 \mathrm{Cl}$

D

$\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3$

3
TG EAPCET 2025 (Online) 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Metal $X$ obtained from sphalarite ore can be purified by which of the following method?

A

Distillation

B

Poling

C

Zone refining

D

Vapour phase refining

4
TG EAPCET 2025 (Online) 2nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

An oxoacid of phosphorus ' $X$ ' reduces silver nitrate solution to metallic silver and gets oxidised to another compound $Y . X$ and $Y$ respectively are

A

$\mathrm{HPO}_3, \mathrm{H}_3 \mathrm{PO}_4$

B

$\mathrm{H}_3 \mathrm{PO}_2, \mathrm{H}_3 \mathrm{PO}_4$

C

$\mathrm{H}_3 \mathrm{PO}_3, \mathrm{H}_3 \mathrm{PO}_2$

D

$\mathrm{H}_3 \mathrm{PO}_2, \mathrm{HNO}_3$

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