Covalent Bond

Q.

Which of the following covalent compounds become electrovalent when dissolved in water?

1. Ozone

2. Methane

3. Hydrogen chloride

4. Hydrogen dioxide

Q.

Molecular reactions are generally slow reactions and they are shown by _____ compounds.

1. Covalent

2. Ionic

3. Co-ordinate

4. Both ionic and covalent.

Q.

1. Why is water written as H²O and not written as OH²

Q. The products formed in a chemical reaction has entirely different properties than that of reactants.

1. True
2. False

Q. During a chemical reaction, the chemical composition of the reactants remains the same.

1. True
2. False

Q.

Carbon compounds form ____________ bonds.

1. Ionic bond

2. Electrovalent bond

3. Covalent bond

4. Hydrogen bond

Q.

Write the electronic configuration of ${}_{14}{}^{28}\mathrm{Si}$ and hence its valency as well as the formulae of its chlorides and oxides.

Q. The products formed in a chemical reaction has entirely different properties than that of reactants.

1. True
2. False

Q. During a chemical reaction, the chemical composition of the reactants remains the same.

1. False
2. True

Q. The products formed in a chemical reaction has entirely different properties than that of reactants.

1. False
2. True

Q. Element A has three electrons in the outermost orbit and B has six electrons in the outer most orbit. The formula of the compound will be :

1. A${}_2$B${}_6$
2. A${}_2$B
3. A${}_3$B${}_2$
4. A${}_2$B${}_3$

Q. Electronic configuration of an element $A$ is $1s^{2}2s^{2}2p^{6}3s^1$ and electronic configuration of another element $B$ is $1s^{2}2s^{2}2p^{6}3s^{2}3p^4$. The possible compound that can be formed between $A$ and $B$ is :

1. $A{B}_2$
2. $AB$
3. $A_{2}B$
4. $A_2{B}_3$

Q.

Giving a suitable example, describe the formation of a

Nonpolar covalent bond

Q. All the atoms in the given pictures are _____.

Q. What is the difference between an element, compound, and molecule?

Q. All the atoms in the given pictures are _____.

1. 
2. 
3. 
4. 

Q. During a chemical reaction, the chemical composition of the reactants remains the same.

1. False
2. True

Q. Valence electrons in the elements $X$ and $Y$ are 3 and 6. What is the formula of the compound formed from $X$ and $Y$?

1. $X_2{Y}_3$
2. $X_3{Y}_3$
3. None of these
4. $X_2{Y}_4$

Q.

The atomicity of FeCO₃ is ______.

1. four
2. three
3. six
4. five

Q. The atomicity of the element argon is ______.

1. one
2. three
3. four
4. two