Question
Which of these groupings of elements could have the characteristic of brittle?
- Metal
- Non-metal
- Metalloid
- None of the above
Hint:
Non-metal elements could have the characteristic of being brittle
The correct answer is: Non-metal
- Non-metal elements could have the characteristic of being brittle.
- A material is brittle if, when subjected to stress, it fractures with little elastic deformation and without significant plastic deformation.
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Iodine test is used to check the presence of _________.
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Which element irritates the mucous membrane?
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Match the following.
Match the following.
Choose which of the following is the typical behaviour of plastic.
Choose which of the following is the typical behaviour of plastic.
____ is the synthetic fiber used to make parachutes.
The correct option is c)Nylon.
Nylon threads are very strong and can withstand high loads. As such, it is used to make parachutes and ropes for climbing. Nylon fibers are strong, elastic and shiny. It is easy to wash, dries quickly even after washing, and does not lose its shape. These properties make it ideal for making parachutes and raincoats.
____ is the synthetic fiber used to make parachutes.
The correct option is c)Nylon.
Nylon threads are very strong and can withstand high loads. As such, it is used to make parachutes and ropes for climbing. Nylon fibers are strong, elastic and shiny. It is easy to wash, dries quickly even after washing, and does not lose its shape. These properties make it ideal for making parachutes and raincoats.
Assertion: Nylon fibers cannot be used for making ropes for climbers.
Reason: Nylon fibers are very strong fibers.
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Select the correct R principle for the statement. “To use something again that you would normally throw away.”
The correct option is b)Reuse.
Reuse is the act or practice of using an item, whether for its original purpose or to perform some other function. This should be distinguished from recycling, which dismantles used items to produce raw materials for manufacturing new products.
Select the correct R principle for the statement. “To use something again that you would normally throw away.”
The correct option is b)Reuse.
Reuse is the act or practice of using an item, whether for its original purpose or to perform some other function. This should be distinguished from recycling, which dismantles used items to produce raw materials for manufacturing new products.
