Properties of Ionic compound

Q.

is water ionic or covalent?

Q. You have two solutions, A and B. The pH of solution A is 6 and pH of solution B is 8. Which solution has more hydrogen ion concentration? Which of this is acidic and which one is basic?
[1 Mark]

Q.

Sodium chloride does not exist as molecules but aggregates of oppositely charged ions.explain

Q.

Why does an ionic compound conduct electricity?

Q. Is H₂ an atom or a molecule?

Q.

Why do elements combine?

Q.

Ionic compounds do not conduct electricity in solid state. Identify the correct reason.

1. Absence of oppositely charged ions in solid state

2. Absence of mobile ions in solid state

3. Absence of forces of attraction between ions in solid state

4. Absence of free electrons in solid state

Q.

Write two examples of metallic solids.

Q.

Covalent compounds do not conduct electricity in the molten state.

1. True

2. False

Q.

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??

Q. Write the difference between ionic compounds and covalent compounds?

Q. Correct the following statement:
Lead bromide conducts electricity.

Q.

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?

1. Very near to 7

2. Less than 7

3. More than 7

4. Exactly 7

Q. What is proton affinity

Q.

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?

1. Washing soda

2. Common salt

3. Baking soda

4. Bleaching powder

Q.

If $pH$ of the solution is $13$, means that it is

1. weekly acidic

2. weekly basic

3. strongly acidic

4. strongly basic

Q.

Which of the following is not a conductor of electricity?

1. Solid NaCl

2. Cu

3. Fused NaCl

4. Brine

Q.

The compounds formed when metals react with non-metals are:

1. Ionic

2. Metallic

3. Covalent

4. Metalloid

Q.

Basicity means replaceable H⁺ ions but what is meant by replaceable H⁺ ions ?

Q.

Which hydrogen bond is the weakest?

Q. What does covalent compounds cointain as the constituent particles

Q.

What are the particles present in a compound which is a non-electrolyte?

Q.

Which of the following does not conduct electricity?

1. Molten $\mathrm{NaOH}$

2. Molten $\mathrm{KOH}$

3. Solid $\mathrm{NaCl}$

4. Aqueous $\mathrm{NaCl}$

Q.

Which of the following condition(s) is/are correct for the formation of an electrovalent bond?

1. Lower electron affinity values of an atom favour ionic bonding.

2. The ionisation potential of an atom should be high so that a cation is formed easily.

3. The difference in electronegativities of two atoms is higher.

4. Both atoms which take part in bonding should have low electronegativity.

Q.

Name the cations formed during electrolysis of water.

Q. Why PCl3Br2 is polar but PCl2Br3 is non polar ??

Q.

Nitrogen turns moist litmus red.

1. True
2. False

Q. How many moles of magnesium phosphate will contain 0.25 mole of oxygen atoms ? Do it by unitary method.

Q. ntthe ionisation energy of He+ is 19.6 J/atom . the energy of first stationary state o Li2+ is?n

Q. ${\wedge }_m={\wedge }_m^o-k\sqrt{C}$ is valid for

1. Weak electrolytes only
2. both weak and strong electrolytes
3. strong electrolytes only