Advertisements
Advertisements
प्रश्न
Name two physical properties of sodium in which it's behaviour is not as expected from it's classification as metal.
उत्तर
Metals are generally strong. But sodium is not a strong metal and it cannot support heavy objects without breaking.
Metals are generally hard. But sodium is a soft metal and can be cut even with a knife.
APPEARS IN
संबंधित प्रश्न
Fill in the blanks:
Iron is ________ reactive than copper.
What is meant by "brittleness"? Which type of elements usually show brittleness: metals or non-metals?
Name:
a metal which is a bad conductor of heat and electricity
Give the effect of heat on metal oxides based on the activity series ?
How many valence electrons are present in:
(i) metals and
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. |
Give the common name and chemical name of an ore of:
(a) zinc (b) aluminium (c) iron.
Give reason for the following:
Metals form cations while non-metals form anions.
Give reason for the following:
Potassium reacts vigorously with cold water while copper does not react with water or steam.
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
