Mono Atomic Ions

Q.

Give two examples of a triatomic molecule

Q.

Define Polyatomic molecules.

Q.

What is the atomicity ? Write the atomicity of hydrogen , helium , chlorine , oxygen , nitrogen

Q.

Which radioactive element is used for cancer treatment?

1. Xenon

2. Argon

3. Radon

4. None

Q.

Which one of the following elements exists as a monoatomic molecule?

1. Oxygen

2. Phosphorus

3. Sulphur

4. Argon

Q. ___ is a triatomic molecule consisting of three oxygen atoms.

Q.

What is atomicity?

Q.

Select the correct formula for the Hydroxide ion.

1. $H^{+}$

2. $H^{-}$

3. $H_2$

4. $O{H}^{-}$

Q.

Differentiate between monoatomic molecules and diatomic molecules.

Q.

The valency of the chloride radical is

1. 3

2. 1

3. 2

4. 4

Q.

Which of the following elements exist in monoatomic form?

1. Neon

2. Oxygen

3. Sulphur

4. Nitrogen

Q.

Polyatomic molecules are made up of more than three atoms.

1. True
2. False

Q.

Please explain me what is a valency

Q.

What is the difference between hydronium ion and hydrogen ion?

1. When $H^{+}$ is mixed with $H_{2}O$ it forms ${H_{3}O}^{+}$ and hydrogen ion is the nucleus of a hydrogen atom separated from its accompanying electron

2. When $H^{+}$ is mixed with $H_{2}O$ it forms ${H_{3}O}^{+}$ while hydronium ion is nucleus of a hydrogen atom

3. When $H^{+}$ is mixed with $H_{2}O$ it forms $H^{+}$ while hydronium ion is nucleus of a hydrogen atom

4. None of the choices

Q.

By giving example define the term monoatomic molecules.

Q.

Give some examples for monoatomic, diatomic, triatomic, tetra atomic and polyatomic molecules.

Q.

Identify the polyatomic ions from the following.

1. $N{H}^{4+}$

2. $A{l}^{3+}$

3. $O^{2-}$

4. Hydroxide ion

Q. The valency of $P{O}_4^{3-}$ is

1. $2$
2. $0$
3. $1$
4. $3$

Q. What is valency? Give the valencies of the following: oxygen, hydrogen, sodium, magnesium, chlorine.

Q.

What are triatomic molecules? Give an example.

Q. How to find valency factor?

Q.

Which of the following statement is incorrect in case of sodium chloride?

1. Valency of sodium is 2

2. Valency of chlorine is 1

3. All are incorrect.

4. Valency of sodium is 1

Q. The total number of valence electrons in 4.2 g of N3-ion is ? How to solve and what does valence electrons means?

Q. Which of the following are polyatomic ions?

1. Ammonium
2. Hydride
3. Oxide
4. Hydroxide

Q.

In a test, Rashi has to write the chemical equation for the formation of hydrochloric acid. She wrote

$H_2+2Cl\to 2HCl$

The teacher marked the answer wrong. Why is it so?

1. The equation is not balanced.

2. In this 2 atoms of chlorine were used insteadof1 molecule of chlorine.

3. In this 2 molecule of chlorine was used instead of 2 atoms of chlorine.

4. Hydrogen and chlorine do not react to form hydrochloric acid.

Q.

Select the correct formula for the hydride ion.

1. $H_2$

2. $H^{-}$

3. $H^{+}$

4. $O{H}^{-}$

Q.

The correct value of Avogadro’s number is :

1. $6.023\times {10}^{23}$

2. $6.021\times {10}^{22}$

3. $6.023\times {10}^{-23}$

4. $0.00000621$

Q. One mole of a substance contains $6.022\times {10}^{23}$ particles.

1. False
2. True

Q.

Which of the following elements are said to have Monoatomic molecule?

1. Sodium

2. Calcium

3. Ozone

4. Xenon

Q. Choose the correct pairs based on the charge possessed by the ions of the given elements.

1. Lithium
2. Oxygen
3. -2
4. Calcium
5. 1
6. Chlorine
7. 2
8. -1