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प्रश्न
Fill in the blank.
A non-metal used to purify water is ______.
उत्तर
A non-metal used to purify water is Charcoal.
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संबंधित प्रश्न
Write any three differences between metals and non-metals with respect to their physical properties.
Which of the following statements is correct?
Name the gas that is produced in the given case:
The reaction of ethanol and sodium.
Name a non-metal having a very high melting point.
Name two non-metals which are both brittle and non-ductile.
State any five physical properties of metals.
The electronic configurations of three elements A, B and C are as follows:
| A | 2, 8, 1 |
| B | 2, 8, 7 |
| C | 2, 4 |
(a) Which of these element is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
Name a non-metal that is hardest naturally occurring substance
Name a non-metal that is used for cancer therapy
Statements given below are incorrect. Write the correct statements :
Chlorine gas is used in the manufacture of sulphuric acid.
Write ‘True’ or ‘False’ in front of following statement.
Stainless steel is used for making power transmission wires.
Write ‘True’ or ‘False’ in front of following statement.
Graphite is used in making filaments of electric bulb.
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Basic oxide………..
Name:
the compound responsible for green deposit on the surface of copper
Why is hydrogen kept in the metal activity series?
Give the common name and chemical name of an ore of:
(a) zinc (b) aluminium (c) iron.
______ is the only non-metal which conducts electricity.
Name six common non-metals and write their symbols.
Reason out
Mercury is the only metal that is liquid at room temperature.
