What material is used to make electric heater coil ?
1). Copper
2). Iron
3). Silver
4). Nichrome
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1. Spirit in contact with body gives cool sensation because it is :
2. Which one of the following minerals is found in Mona2ite sand
4. All isotopes of the same element have ________
5. Which of the following vegetable oils does not contain essential fatty acids ?
6. Which one among the following is used in making gunpowder?
7. Alcoholic fermentation is brought about the action of -
8. Which among the following is false about natural rubber?