Covalent Bonding in Different Atoms

Q. In an hydrogen chloride molecule, hydrogen and chlorine atoms are held by a double bond.

1. True
2. False

Q. The total number of single bonds in ${\text{H}}_2\text{O}$ molecule is/are:

1. one

2. two

3. three

4. four

Q.

What are inorganic, organic, molecular and complex compound in an easy language and an example

Q. In P4O10 the number of co-ordinate bonds is

Q. Concept of peroxy bond in detail .

Q. SF4 is sp3d explain

Q. correct order of bond angle in H2S NH3 BF3 and SiF4?

Q. The shape of water molecule which should be tetrahedral has a bent or distorted tetrahedral shape with a bond angle ${104.5}^o$. What could be the reason for this?

1. $\text{lp-lp}$ repulsion is more than $\text{lp-bp}$ repulsion
2. $\text{lp-bp}$ repulsion is more than $\text{lp-lp}$ repulsion
3. $\text{lp-lp}$ repulsion is equal to $\text{lp-bp}$ repulsion
4. Presence of lone pair does not affect the bond angle

Q.

The ratio between the number of molecules in 2g of hydrogen and 32g of oxygen is? [given that H=1 O=16]

1. (A)1:2

2. (B)1:0.01

3. (C)1:1

4. (D)0.01:1

Q. What is polar bond and how the bond will form ?

Q.

Why life began in water and not land?

1. Molecular bonds were stronger in water

2. Molecular bonds were safer in water than land

3. Molecular bonds grew better in water

4. Molecules used sea water for metal supplement

Q.

The high specific heat of water is mainly due to ________ and __________.

1. Hydrogen bond and ionic bond

2. Hydrogen bond and polar covalent bond

3. Hydrogen bond and action of gravity

4. None of these

Q. Explain coordinate dative bonds?

Q.

Write the balanced chemical equation for the following chemical reactions:

$$\begin{gathered} \mathrm{a}.\mathrm{Hydrogen}+\mathrm{Chlorine}\to \mathrm{Hydrogen}\mathrm{chloride} \\ \mathrm{b}.\mathrm{Lead}+\mathrm{copper}\mathrm{chloride}\to \mathrm{Lead}\mathrm{chloride}+\mathrm{Copper} \\ \mathrm{c}.\mathrm{Zinc}\mathrm{oxide}+\mathrm{Carbon}\to \mathrm{Zinc}+\mathrm{Carbon}\mathrm{monoxide} \end{gathered}$$

Q. During the formation of a water molecule, the hydrogen atoms _______.

1. donate electrons to the oxygen atom
2. do not react
3. share electrons with the oxygen atom
4. accept electrons from the oxygen atom

Q. ratio of hydrogen and oxygen of water molecule.

1. 1:2
2. 2:1
3. 2:3
4. 3:2

Q. According to Dalton, atoms combine in ________ ratio to form compounds.

Q. The ratio of hydrogen and oxygen by mass in water is:

1. $8:1$
2. $1:8$
3. $2:1$
4. $1:2$

Q. How many electron pairs are present in valence shell of oxygen in water molecule?

1. $4$
2. $2$
3. $3$
4. $1$

Q. why polar covalent bonds have high bond energy than non polar covanlent bonds?

Q. How many double bonds are there in a water molecule?

Q.

Who was the first scientist to use the term element?

1. Antoine Laurent Lavoisier

2. Neils Bohr

3. J.J Thompson

4. Robert Boyle

Q. Suggest a test to find the hardness of water and explain its procedure

Q. Choose the odd one out from the following.

1. Magnesium chloride
2. Sodium chloride
3. Hydrogen chloride
4. Potassium chloride

Q. The total number of electrons shared between the atoms of a hydrogen chloride molecule is .

1. 3
2. 1
3. 2
4. 4

Q. How many electron pairs are shared between carbon and hydrogen atoms in methane?

1. Eight
2. Two
3. Four
4. Six

Q. Identify the correct pair of compounds with the number of single bonds present in it.

1. Two
2. Four
3. 
4. 
5. Three
6. 

Q. How many hydrogen molecules are required to make four molecules of water?

1. One
2. Two
3. Three
4. Four

Q. Draw the shape of water molecule.

Q. Draw the electron-dot structures of the following compounds and state the type of bonding in each case:
(i) CO2
(ii) MgO
(iii) H₂O
(iv) HCl
(v) MgCl₂