NCERT Solutions for Class 10th Science
Chapter 3. Metals and Non-metals
Additional Questions With Solutions
Additional Questions With Solutions:
Q1: What is malleability?
Ans: Some metals can be beaten into thin sheets. This property is called malleability. Ex. – gold , Silver.
Q2: What is ductility?
Ans: The ability of metals to be drawn into thin wires is called ductility. Such a metal is called ductile metal. Ex. – gold and silver.
Q3: What is sonorous?
Ans: The metals that produce a sound on striking a hard surface are said to be sonorous.
Q4: Why are school bells made of metals?
Ans: The metals have a property of sonorous; they produce sound on striking a hard surface, so the school bells are made of metals.
Q6: Name two metals which melt to keep them on your palm.
Ans: Gallium and caesium.
Q7: Name a allotrope of carbon which is good conductor of electricity.
Q8: What do non metals produce when dissolve in water.
Ans: They produce acidic oxides.
Q11: What is anodising?
Ans: Anodising is a process of forming a thick oxide layer of aluminium.
Q13: What is done with the article to protect the further corrosion?
Q18: Name the metals which float in water.
Ans: Calcium and magnesium.
Q19: Why do Calcium and magnesium float in water?
Ans: Calcium and magnesium start floating because the bubbles of hydrogen gas formed stick to the surface of the metals.
Q20: Name two metals which do not react with hot or cold water but react with steam.
Ans: Aluminium and Iron.
Q21: What is the nature of metallic oxide?
Q22: What is the nature of non-metallic oxide?