Advertisements
Advertisements
प्रश्न
Name one metal which is a liquid at room temperature
उत्तर
Mercury
APPEARS IN
संबंधित प्रश्न
Fill in the blanks:
Iron is ________ reactive than copper.
State why concentrated sulphuric acid is not used for drying ammonia gas
Write the name and formulae of a non-metal hydride.
Name one metal which is stored in kerosene oil.
What is meant by "brittleness"? Which type of elements usually show brittleness: metals or non-metals?
Which of the following are amphoteric oxides:
MgO, ZnO, P2O3, Al2O3, NO2
What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
State one use of Hydrogen.
Define non-metals. Give five examples of non-metals.
Name a metal that can be cut with knife
Give reasons
Copper is used in making electric cables.
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is ______
Write ‘True’ or ‘False’ in front of following statements.
Non-metals are poor conductors of electricity.
State two important uses of following non-metal
Uses of chlorine
Name the three classes in which elements are classified. Which was the first metal used by man?
Name:
a metal which lacks ductility
A metallic oxide which cannot be reduced by normal reducing agents:
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.
Give reason for the following:
Potassium reacts vigorously with cold water while copper does not react with water or steam.
Non-metals are non-malleable.
