___________ is an allotroph of carbon and is the hardest natural substance.

Academic Chemistry NCERT Class 10

Diamond is an allotroph of carbon and is the hardest natural substance.

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Updated on: 10-Oct-2022

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Name the hardest natural substance known.
Name the naturally occuring hardest substance known.
A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.
If n is an even natural number, then the product of its successor and predecessor is ___.
What is the meaning of substance?
Why is mixture called an impure substance?
Of what substance is the core of the coil of an electric motor made?
Which one of the following is an inexhaustible natural resource?coalpetroleumwaterforests
What is acidic, and what is responsible for the acidic nature of substance?
A solid substance P which is very hard is used in the construction of many buildings, especially flooring. When substance P is heated strongly, it decomposes to form another solid Q and a gas R is given out. Solid Q reacts with water with the release of a lot of heat to form a substance S. When gas R is passed into a clear solution of substance S, then a white precipitate of substance T is formed. The substance T has the same chemical composition as starting substance P.(a) What is substance P? Write its common name as well as chemical formula.(b)What is substance Q?(c)What is gas R?(d)What is substance S? What is its clear solution known as?(e)What is substance T? Name any two natural forms in which substance T occurs in nature?
In an electrolytic tank, aluminium metal is being extracted by the electrolysis of molten aluminium oxide using carbon electrodes. It is observed that one of the carbon electrodes is gradually burnt away and has to be replaced.(a) Which carbon electrode (cathode or anode) is burnt away? (b) Why is this carbon electrode burnt away?
What is the significance of the formula of a substance?
Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?CoalPetroleumSunlightMinerals
On the basis of composition of matter, milk is considered to be :(a) a pure substance (b) an impure substance(c) an element (d) a compound
What is the starting number of Natural number and Whole number ?

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