Polar Covalent Compounds

Q.

Write three properties of salts.

Q.

What are the types of noncovalent bonds?

Q.

Why are ionic compounds soluble in water but covalent compounds in kerosene?

Q.

(a) Name two compounds that are covalent when taken pure but produce ions when dissolved in water.

(b) For each compound mentioned above, give the formulae of ions formed in aqueous solutions.

Q.

The electrovalent linkage is present in_______.

Q.

Non-polar covalent compounds ionise in water.

1. False

2. True

Q.

The valency of nitrogen in $N_2$ molecule is.............

Q.

Water contains-

1. One hydrogen atom and two oxygen atoms

2. Two hydrogen atoms and one oxygen atom

3. Three hydrogen atoms and two oxygen atoms

4. One hydrogen atom and one oxygen atom

Q.

Compounds in which the shared pair of electrons is unequally shared between the reacting atoms are called a___ compound.

Q.

Name the kind of particles present in sodium hydroxide solution.

Q.

Among the following the maximum covalent character is shown by the compound _____

1. $FeC{l}_2$

2. $SnC{l}_2$

3. $AlC{l}_3$

4. $MgC{l}_2$

Q. Intermolecular hydrogen bonding increases the enthalpy of vapourization of a liquid due to

1. decrease in the attraction between molecules

2. increase in the attraction between molecules

3. decrease in the molar mass of unassociated liquid molecules

4. increase in the effective molar mass of hydrogen-bonded molecules

Q. Which of the following molecules shape can not be predicted by VSEPR theory?

1. $BeC{l}_2$
2. $B{F}_3$
3. $C{H}_4$
4. $C_2{H}_6$

Q.

Write the chemical name of the following compound.

${\mathrm{NH}}_4\mathrm{OH}$

Q.

Write the various areas in which chemistry has helped us.

Q. What is the formal charge of $C$ in $CO$ ?

1. 0
2. 1
3. -1
4. 2

Q. Which has maximum polarising power?

1. $C{a}^{+2}$
2. $C{u}^{+2}$
3. $Z{n}^{+2}$
4. $S{n}^{+2}$

Q.

Which of the following has higher polarising power- ${\mathrm{Al}}^{3+}$ , ${\mathrm{Mg}}^{+2}$ , ${\mathrm{O}}^{2-}$?

Q. Respected Byju's faculty

My name VANDITA YADAV and I AM student of Byju's 9th grade I.C.S.E. .

MY QUESTION IS :
Potassium chloride is an electrolvalent compound while hydrogen chloride is a covalent compound but both of them conduct electricity in aqueous solution. Why ?

Q.

Identify the bonds present in $\mathrm{HClO}$.

1. Polar covalent bond

2. Non-polar covalent bond

3. Dative bond

4. Both (a) and (c)

Q. Identify this bond:

Q.

Read the following and select one the correct answer.

Statement I: Boron always forms covalent bond

Statement II: The small size of $B^{3+}$ favours formation of covalent bond

1. Statement I and Statement II are both correct. Statement II correctly explains Statement I

2. Statement I and Statement II are both correct. Statement II does not explain Statement I

3. Statement II is correct and Statement I is wrong

4. Statement I is correct and Statement II is wrong

Q. Which contains both polar and non-polar bonds:

1. $N{H}_{4}Cl$
2. $H_2{O}_2$
3. $HCN$
4. $C{H}_4$

Q.

What determines the Binding Affinity?

Q.

Why is magnesium (MgCl2) soluble in water but magnesium hydroxide (Mg(OH)2) insoluble?

Q. In ammonia molecule polar covalent bond formation takes place between nitrogen and hydrogen.

1. True
2. False

Q.

When ice-cubes are pressed together, they fuse because of _____

1. H - bonding

2. Vander Waal forces

3. Covalent attraction

4. Dipole-dipole interaction

Q.

When we tear paper does it's particles also get separated into two?

Q. Why should a cation like Na+ should act as a Lewis acid and tend to accept an electron although it has already attained stability by having a Nobel gas configuration?

Q. If the electron pair is unequally shared between the bonded atoms, it results in polar covalent bond.

1. True
2. False