1
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

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

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

Zinc on reaction with concentrated nitric acid gives an oxide of nitrogen $(A)$. Zinc with dilute nitric acid gives another oxide of nitrogen $(B)$. Oxidation numbers of nitrogen in $(A)$ and $(B)$ are respectively

A

$+4,+1$

B

$+4,+2$

C

$+2,+4$

D

$+1,+4$

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

Identify the reaction related to Deacon's process

A

$$ 2 \mathrm{H}_2 \mathrm{O}+2 \mathrm{Cl}_2 \xrightarrow{\text { sunight }} 4 \mathrm{HCl}+\mathrm{O}_2 $$

B

$$ 4 \mathrm{HCl}+\mathrm{O}_2 \xrightarrow[723 \mathrm{~K}]{\mathrm{CuaC}_2} 2 \mathrm{Cl}_2+2 \mathrm{H}_2 \mathrm{O} $$

C

$$ 2 \mathrm{NaCl}+\mathrm{H}_2 \mathrm{SO}_4 \xrightarrow{823 \mathrm{~K}} \mathrm{Na}_2 \mathrm{SO}_4+2 \mathrm{HCl} $$

D

$$ \mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3+\mathrm{Cl}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Na}_2 \mathrm{SO}_4+2 \mathrm{HCl}+\mathrm{S} $$

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

Identify the correct statements about lanthanoids

I. $\mathrm{Ce}^{4+}$ and $\mathrm{Tb}^{4+}$ act as oxidising agents.

II. $\mathrm{Eu}^{2+}$ and $\mathrm{Yb}^{2+}$ act as oxidising agents.

III. Misch metal is an alloy of $95 \%$ iron and $5 \%$ lanthanoid metal.

IV. $\mathrm{La}^{3+}$ and $\mathrm{Ce}^{4+}$ are diamagnetic in nature.

A

I and II only

B

I and IV only

C

II, III and IV only

D

I, II and IV only

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