Question
Why are ionic compounds generally hard?

Answer

Ionic compounds are usually hard because ther held together by strong electrostatic forces of attraction. Therefore the oppositely charged ions pack tightly with each other and form a crystalline structure which is very hard to break down.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What is gypsum? What happens when gypsum is heated to 100°C (373 K)?
Write the product by giving balanced chemical equation.
When phosphorus reacts with conc. sulphuric acid.
What is saponification? Write the chemical equation of the reaction involved in this process. Name all the substances which take part in this process and also those which are formed.
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
What happens when an acid reacts with a metal carbonate? Explain with the help of an example.
Write chemical equation of the reaction involved.
When a piece of limestone reacts with dilute HCl , a gas X is produced. When gas X is passed through lime water then a white precipitate Y is formed. On passing excess of gas X , the white precipitate dissolves forming a soluble compound Z.
a. What are $\mathrm{X}, \mathrm{Y}$ and Z ?
b. Write equations for the reactions which take place :
i. When limestone reacts with dilute HCl .
ii. When gas X reacts with lime water to form white precipitate Y.
Draw the electron-dot structures of the following compound:
  1. KCl
  2. CaO
You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Which chemical is injected into the skin of a person:
During the nettle leaf hair sting?
How can the effect of these stings be neutralised?