Properties of Ionic compound
is water ionic or covalent?
Sodium chloride does not exist as molecules but aggregates of oppositely charged ions.explain
Why does an ionic compound conduct electricity?
Why do elements combine?
Ionic compounds do not conduct electricity in solid state. Identify the correct reason.
Absence of oppositely charged ions in solid state
Absence of mobile ions in solid state
Absence of forces of attraction between ions in solid state
Absence of free electrons in solid state
Write two examples of metallic solids.
Covalent compounds do not conduct electricity in the molten state.
One formula unit of MgBr2 is one Mg+2 ion and two Br-1 ions and one formula unit of water is one H2O molecule.why one unit of water is written in the form of molecule where as MgBr2 is written in form of ions??
Write the difference between ionic compounds and covalent compounds.
Lead bromide conducts electricity.
The pH of a sample of pure water is 7 at room temperature. What will be its pH when a pinch of solid baking soda is dissolved in it?
Very near to 7
Less than 7
More than 7
A student tests a sample of drinking water and reports its pH value as 6 at room temperature. Which one of the following might have been added in water?
If of the solution is , means that it is
Which of the following is not a conductor of electricity?
The compounds formed when metals react with non-metals are:
Basicity means replaceable H+ ions but what is meant by replaceable H+ ions ?
Which hydrogen bond is the weakest?
What are the particles present in a compound which is a non-electrolyte?
Which of the following does not conduct electricity?
Which of the following condition(s) is/are correct for the formation of an electrovalent bond?
Lower electron affinity values of an atom favour ionic bonding.
The ionisation potential of an atom should be high so that a cation is formed easily.
The difference in electronegativities of two atoms is higher.
Both atoms which take part in bonding should have low electronegativity.
Name the cations formed during electrolysis of water.
Nitrogen turns moist litmus red.
- Weak electrolytes only
- both weak and strong electrolytes
- strong electrolytes only