Together With Science Class 10 Chapter 3 - Metals and Non-metalsShare
Together With Science Class 10 Chapter 3 - Metals and Non-metals
A metal ‘X’ loses two electrons and a non-metal ‘Y’ gains one electron. Show the electron dot structure of compound formed between them. Is it ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?
State reasons for the following observations:
(a) The shining surface of some metals becomes dull when exposed to air for a long time.
(b) Zinc fails to evolve hydrogen gas on reacting with dilute nitric acid.
(c) metal sulphides occur mainly in rocks but metal halides occur mostly in sea and lake waters.
Four metal A, B, C and D are added to the following aqueous solutions one by one. The observations made are tabulated below:
Answer the following questions based on the above observations:
(a) Which is the most active metal and why?
(b) What would be observed if B is added to a solution of copper (II) sulphate and why?
(c) Arrange the metal A, B, C and D in order of increasing reactivity.
(d) The container of which metal can be used to store both zinc sulphate solution and silver nitrate solution?
(e) Which of the above solutions can be easily stored in a container made up of any of these metals?
|Chapter 1 - Chemical Reaction and Equation|
|Chapter 2 - Acids, Bases and Salts|
|Chapter 3 - Metals and Non-metals|
|Chapter 4 - Carbon and its Compounds|
|Chapter 5 - Periodic Classification of Elements|
|Chapter 6 - Life Processes|
|Chapter 7 - Control and Coordination|
|Chapter 8 - How Do Organisms Reproduces?|
|Chapter 9 - Heredity and Evolution|
|Chapter 10 - Light-Reflection and Refraction|
|Chapter 11 - The Human Eye and the Colourful World|
|Chapter 12 - Electricity|
|Chapter 13 - Magnetic Effects of Electric Current|
|Chapter 14 - Sources of Energy|
|Chapter 15 - Our Environment|
|Chapter 16 - Management of Natural Resources|