1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

Which one of the following oxoacids of phosphorus can reduce $$\mathrm{AgNO}_3$$ to metallic silver?

A
$$\mathrm{H}_3 \mathrm{PO}_2$$
B
$$\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_7$$
C
$$\mathrm{H}_4 \mathrm{P}_2 \mathrm{O}_6$$
D
$$\mathrm{H}_3 \mathrm{PO}_4$$
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

Which of the following hydrides is electron deficient?

A
$$\mathrm{CaH}_2$$
B
$$\mathrm{CH}_4$$
C
$$\mathrm{B}_2 \mathrm{H}_6$$
D
$$\mathrm{NaH}$$
3
KCET 2022
MCQ (Single Correct Answer)
+1
-0

$$\left(\mathrm{NH}_4\right)_2 \mathrm{Cr}_2 \mathrm{O}_7$$ on heating liberates a gas. The same gas will be obtained by

A
heating $$\mathrm{NH}_4 \mathrm{NO}_2$$
B
treating $$\mathrm{H}_2 \mathrm{O}_2$$ with $$\mathrm{NaNO}_2$$
C
treating $$\mathrm{Mg}_3 \mathrm{~N}_2$$ with $$\mathrm{H}_2 \mathrm{O}$$
D
heating $$\mathrm{NH}_4 \mathrm{NO}_3$$
4
KCET 2022
MCQ (Single Correct Answer)
+1
-0

The strong reducing property of hypophosphorus acid is due to

A
the positive valency of phosphorus
B
two $$\mathrm{P}-\mathrm{H}$$ bonds
C
presence of phosphorus in its highest oxidation state
D
its concentration
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