131. The formula of haematite is

1. 1. Fe₃O₄

   
   
   

   2. Fe₂O₃

   
   
   

   3. FeCO₃

   
   
   

   4. FeS₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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132. The solubility of AgBr in hypo is due to the formation of

1. 1. Ag₂S₂O₃

   
   
   

   2. [Ag(S₂O₃)]^-

   
   
   

   3. [Ag(S₂O₃)]^3-

   
   
   

   4. Ag₂SO₃

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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133. The purple colour of [Ti(H₂O)₆]³⁺ ion due to

1. 1. Ttransfer of an electron

   
   
   

   2. Intermolecular vibrations

   
   
   

   3. Presence of water molecules

   
   
   

   4. Unpaired d-electron

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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134. Silver is present in

1. 1. Limonite

   
   
   

   2. Pyrargyrite

   
   
   

   3. Magnetite

   
   
   

   4. Dolomite

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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135. Which of the following is not a property of the transition elements ?

1. 1. Fixed valency

   
   
   

   2. Colour

   
   
   

   3. Paramagnetic

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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