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Q. No.| 1. | Neon gas is filled in discharge tubes with characteristic colours. |
| 2. | Neon gas is used in beacon lights. |
| 3. | Argon along with nitrogen is used in gas-filled electric lamps. |
| 4. | All of the above. |
Which of the following diseases has radon been used in the treatment of?
| 1. | Typhoid | 2. | Cancer |
| 3. | Cough and cold | 4. | Corona |
Which of the following correctly describes SF₄, CF₄ and XeF₄ in terms of molecular shape and lone-pair number?
| 1. | The same with 2, 0 and 1 lone pairs of electrons on the central atoms, respectively |
| 2. | The same with 1, 1 and 1 lone pairs of electrons on the central atoms, respectively |
| 3. | Different with 0, 1 and 2 lone pairs of electrons on the central atoms, respectively |
| 4. | Different with 1, 0 and 2 lone pairs of electrons on the central atoms, respectively |
(a) XeF6 + 3H2O →
(b) XeF6 + H2O
The products formed in the above reactions, respectively, are:
1. XeO3 , XeOF4
2. XeO6 , XeOF4
3. XeO3, XeOF6
4. XeO6 , XeOF6
Which of the following statements is false?
| 1. | H3PO2, H3PO3 and H3PO4 all are tribasic and reducing in nature. |
| 2. | Amongst anions \(NO_{3}^{-}\), \(SO_{3}^{2-}\), \(CO_{3}^{2-}\), and \(BO_{3}^{3-}\), only \(SO_{3}^{2-}\) have pπ-dπ bonding . |
| 3. | Amongst anions \(SO_{3}^{2-}\), \(SO_{4}^{2-}\), \(S_{2}O_{4}^{2-}\) and \(HSO_{4}^{-}\), \(SO_{3}^{2-}\) is basic and reducing in nature. |
| 4. | Number of lone pair(s) of electrons on Xe atoms in XeF2, XeF4 and XeF6 are 3, 2 and 1 respectively._ |
Which of the following molecules have the same number of lone pairs of electrons on the central Xe atom?
(i) XeO₃
(ii) XeOF₄
(iii) XeF₆
1. (i) and (ii) only
2. (i) and (iii) only
3. (ii) and (iii) only
4. (i), (ii), and (iii) only
Which of the following liquids has the ability to climb the glass vessel's wall?
1. Alcohol
2. Liquid He
3. Liquid
4. Water
Which of the following gases is commonly used in a gas thermometer?
| 1. | \(\mathrm{He} \) | 2. | \(\mathrm{O}_2 \) |
| 3. | \(\mathrm{Xe} \) | 4. | \(\mathrm{Ne}\) |
Which of the following statements is correct?
| 1. | Only type of interactions between particles of noble gases are due to weak dispersion forces. |
| 2. | Ionisation enthalpy of molecular oxygen is very high as compared to xenon. |
| 3. | Hydrolysis of XeF6 is a redox reaction. |
| 4. | Xenon fluorides are not reactive. |
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