81. Iron rust is
82. Which of the following is a low melting point metal?
83. Which of the following is the most elastic material?
84. Visco-elastic behaviour of materials which is time dependent is common in
85. Nickel (76%) and chromium (15%) alloys are termed as
86. Karbate is
87. Kel-F is a material, which is
88. Hot working of lead is carried out at
89. A chemical change takes place when iron
90. Addition of 2% nickel in steel makes it suitable for making
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