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प्रश्न
Write the name.
Nonmetal which is a good conductors of electricity.
उत्तर
Nonmetal which is a good conductors of electricity- Graphite
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संबंधित प्रश्न
Fill in the blanks:
Metals are ________ conductors of heat and _________.
Choose the most appropriate answer of the following:
This is not an alloy of copper:
(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
Name the most abundant non-metal in the earth's crust.
Which metal foil is used for packing some of the medicine tablets?
Name a non-metal having lustre (shining surface).
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 a good conductor of heat and electricity
Name the metals present in the following alloys
Stainless steel
Name a metal which is lighter than water :
Name the three classes in which elements are classified. Which was the first metal used by man?
Define metal and non-metal on the basis of electron loss or gain.
Explain how the activity series accounts for each of the following:
reaction with water
Make pairs of substances and their properties
| Substance | Property |
| a. Potassium bromide (KBr) | 1. Combustible |
| b. Gold | 2. Soluble in water |
| c. Sulphur | 3. No chemical reaction |
| d. Neon | 4. High ductility. |
Identify the odd term.
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which floats on water.
Differentiate between metals and non-metals with reference to –
(a) number of electrons in outer or valence shell
(b) formation of cation and anion
(c) reaction with dilute acids.
Select the appropriate option for the following statement:
The element which is noble gas and radioactive in nature.
Which of the following non-metal is lustrous?
Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?
Non-metals are non-malleable.
