231. A colourless gas with smell of rotten egg is

1. 1. SO₂

   
   
   

   2. SO₃

   
   
   

   3. H₂S

   
   
   

   4. None

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

232. The ease of liquefication of noble gas decreases in the order

1. 1. Xe > Kr > Ar > Ne > He

   
   
   

   2. He > Ne > Ar > Kr > Xe

   
   
   

   3. Ar > Kr > Xe > He > Ne

   
   
   

   4. Kr > Xe > He > Ar = Ne

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

---

---

233. The first ever compound of noble gas was prepared by

1. 1. Ramsay

   
   
   

   2. Bartlett

   
   
   

   3. Berzelius

   
   
   

   4. Cavendish

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---

234. Which one of the following outer electronic configuration represents of group 16 (IV A) or chalcogens

1. 1. ns²np⁴

   
   
   

   2. ns²np⁵

   
   
   

   3. ns²np²

   
   
   

   4. ns²np³

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

---

---

235. The oxidation state of oxygen in O₂F₂ is

1. 1. +1

   
   
   

   2. -2

   
   
   

   3. +2

   
   
   

   4. +4

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

---