91. Which of the following alkaline earth metals has the highest ionic mobility in an aqueous solution ?

1. 1. Ba²⁺

   
   
   

   2. Mg²⁺

   
   
   

   3. Ca²⁺

   
   
   

   4. Be²⁺

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

---

92. Iron rusts in the presence of

1. 1. O₂ and N₂

   
   
   

   2. O₂ and moisture

   
   
   

   3. Moisture only

   
   
   

   4. O₂ only

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---

---

93. Stainless steel contains

1. 1. Fe + Cr + Ni

   
   
   

   2. Fe + Ni + Cu

   
   
   

   3. Fe + Cr + Cu

   
   
   

   4. Fe + C + Ni

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

---

94. The highest oxidation state shown by Mn is

1. 1. +2

   
   
   

   2. +3

   
   
   

   3. +6

   
   
   

   4. +7

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

---

---

95. Nitrolim is a mixture of

1. 1. CaCN₂and N₂

   
   
   

   2. CaCN₂ and graphite

   
   
   

   3. CaC₂ and graphite

   
   
   

   4. Ca(CN)₂ and graphite

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

---