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प्रश्न
Fill in the blank.
............. is the hardest substance that occurs naturally.
उत्तर
Diamond is the hardest substance that occurs naturally.
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संबंधित प्रश्न
______ and ______ are the two major crystalline allotropes of carbon.
Define the Following Term:
Crystal
Answer the following question
What are fullerenes? Name the most common fullerenes.
Answer the following question
What impurity is present in black diamond?
Give two uses of graphite.
Fill in the blank:
......... is the most inferior form of coal.
Name the following:
An amorphous form of carbon that contains about 98% carbon.
Give balanced equations for the following chemical reactions:
(a) wood charcoal and cone, nitric acid
(b) coke and steam
(c) wood charcoal and lead monoxide.
Name the following:
The hardest naturally occurring substance.
Complete the statement by filling the blank with the correct word from the option.
The crystal of ________ is opaque to light and is a good conductor of heat.
