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प्रश्न
Identify who I am!
Carbon allotropes- _______
उत्तर
Carbon allotropes- Diamond and graphite
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संबंधित प्रश्न
Which property of copper and aluminium makes them suitable for making electric wires?
Name one non-metal which is stored under water.
Name the non-metal which is used to preserve food materials.
Name a non-metal having lustre (shining surface).
Name a non-metal which is extremely hard.
State three reasons (of which at least one must be chemical) for believing that sulphur is a non-metal.
(a) Give the names and formulae of one metal chloride and one non-metal chloride.
(b) State an important property in which these metal chloride and non-metal chloride differ.
(c) Why do they differ in this property?
Name a metal which is poor conductor of electricity :
State two important uses of following non-metal
Uses of chlorine
Name:
a metal with low melting and boiling points
Give the balanced reactions for the following:
Magnesium reacts with boiling water
Match the following:
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
Distinguish between the physical properties of metals and non-metals with reference to:
(a) lusture (b) malleability (c) ductility (d) tensile strength (e) sonority (f) conduction of heat and electricity (g) melting and boiling point (h) density.
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 shows properties of both metals and non-metals.
Identify who I am!
Amphoteric oxide forming metal- _______
A form of non-metal which has high ductility is
Which non-metal is essential for our life and all living beings inhale it during breathing?
