Hydrogen peroxide can be generated by the hydrolysis of
1.
2.
3.
4.
Which of the following compounds is not an acidic salt?
1. NaH2PO2
2. NaH2PO3
3. Na2H2S2O7
4. NaH2PO4
Which of the following gases is the easiest to liquefy?
1. | Ar | 2. | Ne |
3. | Xe | 4. | Kr |
A solid (A) reacts with strong aqueous NaOH, liberating a foul smelling gas (B), which spontaneously burns in the air, giving smoky rings. A and B are, respectively:
1. P4 (red) and PH3
2. P4 (white) and PH3
3. S8 and H2S
4. P4 (white) and H2S
An element belongs to group 15 and 3rd period of the periodic table. Its electronic configuration would be:
1. \(\mathrm{1 s^2 2 s^2 2 p^4}
\)
2. \(\mathrm{1 s^2 2 s^2 2 p^3}
\)
3. \(\mathrm{1 s^2 2 s^2 2 p^6 3 s^2 3 p^2}
\)
4. \(\mathrm{1 s^2 2 s^2 2 p^6 3 s^2 3 p^3}\)
The word neon signifies:
(1) new
(2) old
(3) strange
(4) none of these
The mineral Clevite on heating gives:
(1) He
(2) Xe
(3) Ar
(4) Ra
Which of the following statements is false?
1. | Xe is the most reactive among the rare gases. |
2. | He is an inert gas. |
3. | Radon is obtained from the decay of radium. |
4. | The most abundant rare gas found in the atmosphere is He. |
What are the products formed in the reaction of xenon hexafluoride with silicon dioxide?
1. +HF
2.
3.
4.
Compound of sulphur that has linkage among the following is:
1.
2.
3.
4.