One Integer Value Correct TypeDirection (Q. Nos. 21-24) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.Number of alloys that contain nickel among the following solder, gun metal, German silver, nichrome, monel metal, constanton, bell metal, duralumin, type metal, invar, alnico.Correct answer is '6'. Can you explain this answer?

Question

Answer

Number of Alloys Containing Nickel

To find the number of alloys that contain nickel among the given options, we need to analyze each alloy and determine if it contains nickel or not. Let's go through each alloy:

1. Solder: Solder is typically made from a combination of tin and lead, and does not contain nickel.

2. Gun metal: Gun metal is an alloy of copper, tin, and zinc, and does not contain nickel.

3. German silver: German silver is a copper alloy with nickel and often contains zinc and other metals. Since it contains nickel, it is one of the alloys that we are looking for.

4. Nichrome: Nichrome is an alloy made of nickel and chromium, and obviously contains nickel. Therefore, it is one of the alloys that we are looking for.

5. Monel metal: Monel metal is a nickel-copper alloy and definitely contains nickel. It is one of the alloys that we are looking for.

6. Constanton: Constanton is an alloy of copper and nickel, and therefore contains nickel. It is one of the alloys that we are looking for.

7. Bell metal: Bell metal is a type of bronze, typically made from copper and tin, and does not contain nickel.

8. Duralumin: Duralumin is an aluminum alloy, and does not contain nickel.

9. Type metal: Type metal is an alloy used for printing, typically made of lead, tin, and antimony. It does not contain nickel.

10. Invar: Invar is an iron-nickel alloy and contains nickel. It is one of the alloys that we are looking for.

11. Alnico: Alnico is a family of alloys composed primarily of aluminum, nickel, and cobalt. Since it contains nickel, it is one of the alloys that we are looking for.

Based on the analysis above, we can conclude that the alloys German silver, nichrome, monel metal, constanton, invar, and alnico all contain nickel. Therefore, the correct answer is 6.

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