1
AP EAPCET 2022 - 5th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the $$P$$ and $$Q$$ of the following reaction

$$P+Q \longrightarrow\left[B(O H)_4\right]^{-}+\mathrm{H}_3 \mathrm{O}^{+}$$

A
$$P=\mathrm{H}_3 \mathrm{BO}_3 ; Q=3 \mathrm{H}_2 \mathrm{O}$$
B
$$P=\mathrm{H}_3 \mathrm{BO}_3 ; Q=2 \mathrm{H}_2 \mathrm{O}$$
C
$$P=\mathrm{HBO}_2 ; Q=2 \mathrm{H}_2 \mathrm{O}$$
D
$$P=2 \mathrm{H}_3 \mathrm{BO}_3 ; Q=\mathrm{H}_2 \mathrm{O}$$
2
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Among $$\mathrm{P}_4, \mathrm{~S}_8$$ and $$\mathrm{N}_2$$ the elements which undergo disproportionation when heated with NaOH solution.

A
$$\mathrm{P}_4, \mathrm{~S}_8$$ only
B
$$\mathrm{N}_2, \mathrm{~S}_8$$ only
C
$$\mathrm{N}_2, \mathrm{P}_4$$ only
D
$$\mathrm{P_4, N_2, S_8}$$
3
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the correct statements about the anomalous behaviour of boron.

I. Boron trihalides can form dimeric structures.

II. Boron shows +1 as stable oxidation state.

III. Maximum covalency of boron is four.

IV. Boron does not form $$\mathrm{BF}_6^{6-}$$ ion.

A
I, II only
B
II, III only
C
III, IV only
D
I, IV only
4
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is formed when $$\mathrm{SO}_3$$ is absorbed by concentrated $$\mathrm{H}_2 \mathrm{SO}_4$$ ?

A
$$\mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_8$$
B
$$\mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_3$$
C
$$\mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_7$$
D
$$\mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_5$$
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