Compound of sulphur that has linkage among the following is:
1.
2.
3.
4.
What are the products formed in the reaction of xenon hexafluoride with silicon dioxide?
1. +HF
2.
3.
4.
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. |
The mineral Clevite on heating gives:
(1) He
(2) Xe
(3) Ar
(4) Ra
The word neon signifies:
(1) new
(2) old
(3) strange
(4) none of these
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. \(\mathrm{1 s^2 2 s^2 2 p^6 3 s^2 3 p^3}\)
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
Which of the following gases is the easiest to liquefy?
1. | Ar | 2. | Ne |
3. | Xe | 4. | Kr |
Which of the following compounds is not an acidic salt?
1. NaH2PO2
2. NaH2PO3
3. Na2H2S2O7
4. NaH2PO4
Hydrogen peroxide can be generated by the hydrolysis of
1.
2.
3.
4.