Atomicity

Q.

Define homoatomic and heteroatomic molecules.

Q.

Define Molarity:

Q.

Which of the following is true about the atomicity of sulphur?

1. It is a monoatomic molecule.

2. It is a diatomic molecule.

3. It is a triatomic molecule.

4. It is a polyatomic molecule.

Q.

What is the atomicity of ${\mathrm{H}}_2{\mathrm{SO}}_4$?

Q. Atomic number is the number of protons present in the nucleus of an atom of an element.

1. True
2. False

Q.

The atomicity of ozone is ________.

Q.

What is the atomicity of neon?

Q. What is difference between atomicity and valency?

Q.

What is atomicity and its kind with examples.

Q.

Atomicity of metals is :

1. Monoatomic

2. Triatomic

3. Diatomic

4. Tetra-atomic

Q.

What is the atomicity of Ba

Q.

When 4 L of nitrogen completely reacts with hydrogen, what would be the volume of ammonia gas formed?

Q.

What is the molarity of HCl solution containing 0.4 moles in 200 mL of the solution?

Q.

Write the atomicity of the ammonia molecule(NH₃).

Q.

Assertion (A): Ozone is an example of a molecule of an element.

Reason (R): Molecules formed by different kind of atoms is known as molecule of an element.

1. Both (A) and (R) are true, and (R) is correct explanation of (A).

2. (A) is true, but (R) is false.

3. Both (A) and (R) are true, but (R) is not a correct explanation of (A).

4. (A) is false, but (R) is true

Q.

Give reason:

Ozone has the atomicity 3.

Q.

What is the atomicity of oxygen?

1. Monoatomic

2. Tetra-atomic

3. Triatomic

4. Diatomic

Q.

Give one example of a monovalent monoatomic cation

Q.

How to know the atomic number when two reactants react e.g.

H2+O2= H2O how it should give H2O2 or HO4

Q.

Atomicity is defined as:

1. The number of atoms in a molecule.
2. The number of molecules in a compound.
3. The mass ratio of elements in a compound.
4. The ratio of atoms in a molecule.

Q.

Atomicity refers to the sum total of ____ of same or different elements present in a ____.

1. molecule, atoms

2. atoms, molecule

3. radicals, molecule

4. radicals, atoms

Q. In a $H_2$ molecule, one pair of electrons is shared between the two hydrogen atoms.

1. True
2. False

Q.

Triatomic molecule among the following is

1. Ozone

2. Phosphorus

3. Sulfur

4. Carbon

Q.

Atomicity is defined as:

1. The number of atoms in a molecule.
2. The number of molecules in a compound.
3. The ratio of atoms in a molecule.
4. The mass ratio of elements in a compound.

Q.

Give one example of a monovalent monoatomic anion

Q. What is the formula unit mass of $N{a}_{2}O$ ?

1. 62

Q.

Assertion (A): Ozone is an example of a molecule of an element.​

Reason (R): Molecules formed by different kind of atoms is known as molecule ​of an element.​

Q.

Match the following :

$$\begin{array}{cc}Element/Substance& Atomicity\\ \left(i\right)Hydrogen& \left(A\right)3\\ \left(ii\right)Argon& \left(B\right)6\\ \left(iii\right)Sulphur& \left(C\right)Diatomic\\ \left(iv\right)Carbondioxide& \left(D\right)Monoatomic\\ \left(v\right)AmmoniumChloride& \left(E\right)Polyatomic\end{array}$$

Q. Assertion :An atom is smallest particle in an element that has the properties of the element. Reason: Molecules are formed by the combination of two or more atoms

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 Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Statement-1: The atomicity of a given compound varies as per its state of matter.
Statement-2: The atomicity of $H_{2}O$ is 4 when it is liquid and 3 when it is ice.

1. Only Statement-1 is true

2. Only Statement-2 is true

3. Both the statements are true.

4. Both the statements are false.