How Do Metals and Non Metals React

Q.

What is the valency of sulphide?

Q.

What is the strongest intermolecular force in the ${\mathrm{H}}_2\mathrm{S}$?

Q. Assertion: $HCl$ is a covalent compound but it conducts electricity in its aqueous state. Reason: In aqueous solution $HCl$ ionises to $H^{+}$ and $C{l}^{-}$ ions which are responsible for electrical conductivity.

1. Both assertion and reason are correct and reason is the correct explanation for assertion.
2. Both assertion and reason are correct but reason is not the correct explanation for assertion.
3. Assertion is correct but the reason is incorrect.
4. Both the assertion and reason are incorrect.

Q.

(a) How do metals react with hydrogen? Explain with an example.
(b) How do non-metals react with hydrogen? Explain with an example.

Q.

What is the valency of nitrogen atom in ${\mathrm{NH}}_3$?

Q.

What type of chemical bond is formed between:
(a) potassium and bromine?
(b) carbon and bromine?

Q.

The attractive force between oppositely charged ions that holds the ions together is called an ionic bond.

1. True
2. False

Q. Covalent compounds are generally soluble in

1. polar solvent
2. non polar solvent
3. water
4. none of these

Q.

Metals are arranged in the electrochemical series based on the ease with which atoms of metals __ (lose/gain) electrons to form positively charged ions.

Q. Arrange the following in increasing order of property indicated:
(i) Li, Be and B (ionization energy)
(ii) F, Cl, Br, I (electron affinity)
(iii) SiO₂, P₂O₅, SO₃, Cl₂O₇ (acidic nature)
(iv) I, I⁺, I⁻ (atomic size)

Q.

Find the valency of chlorine, magnesium and sulphur.

Q.

Are alkaline earth metals dangerous?

Q.

What is the difference between valency and oxidation numbers?

Q.

Which of the following properties are a result of free electrons to be present in metals?

1. Good Heat conduction

2. Good Electrical conduction

3. High Density

4. Both A & B

Q. Assertion : The atoms in a covalent molecule share electrons but some covalent compounds are polar compounds
Reason : In polar covalent molecules, the shared electrons will be close to one of the atoms.

1. Both assertion and reason are true and reason is the correct explanation.
2. Both assertion and reason are true but reason is not the correct explanation.
3. Assertion is true but the reason is false.
4. Assertion is false but the reason is true.

Q.

Why metals are good conductors of electricity wherese glass is a bad conductor of electricity?

Q.

What is metallic bond in easier way

Q.

Name the following.

The combining capacity of the atom of an element

Q. Coordinate bond is also known as bond.

1. ionic
2. dative
3. molecular
4. acceptor

Q.

Sulphur is a metallic element.

1. True
2. False

Q. The type of chemical bond formed by unidirectional sharing of electron is

1. ionic bond
2. covalent bond
3. co-ordinate bond
4. metallic bond

Q.

Name a non-metal which is the conductor of electricity.

Q.

Most of the metals are electropositive, due to which they can easily form:

1. Positive ions

2. Neutral ions

3. Covalent bonds

4. Negatively ions

Q.

Non-metals generally form:

1. Anions

2. Cations

3. Metallic bond

4. basic oxides.

Q.

Why are ionic binds stronger than covalent bonds?

Q.

Elements are classified as metals, non-metals, metalloids and inert gases. Which of them form electrovalent bond?

Q. Which of the following is not formed by transfer of electron(s)?

1. 
   Quicklime
2. 
   Common salt
3. 
   Calcium chloride
4. 
   Methane

Q. Ionic bond involves the electrostatic attraction between the positive and negative ions.

1. True
2. False

Q. In a coordinate bond, both the electrons are donated by a single atom.

1. False
2. True

Q.

The valencies of aluminium and chlorine in the compound $AlC{l}_3$ respectively are ______ and _____.

1. 1, 3

2. 3, 1

3. 1, 1

4. 3, 3