36. Aluminium appears like gold when it is mixed with

1. 1. 90 % Cu

   
   
   

   2. 50 % Ni

   
   
   

   3. 90 % Sn

   
   
   

   4. 50 % Co

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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37. Atomicity of phosphorus is

1. 1. 2

   
   
   

   2. 3

   
   
   

   3. 4

   
   
   

   4. 5

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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38. The catalyst used in manufacture of NO by ostwald process is

1. 1. Pt

   
   
   

   2. Mo

   
   
   

   3. Fe

   
   
   

   4. Ag

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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39. Which of the fuel gases has composition by volume 34% CH₄ + 48% H₂ + 15% O₂ + 3% CO

1. 1. Oil gas

   
   
   

   2. Petrol gas

   
   
   

   3. Coal gas

   
   
   

   4. Water gas

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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40. Amphoteric oxide is/are

1. 1. Al₂O₃

   
   
   

   2. P₂O₃

   
   
   

   3. Tl₂O₃

   
   
   

   4. CO₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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