Atomicity

Q. Which amongst the following gases forms a triatomic molecule?

1. Chlorine
2. Carbon dioxide
3. Carbon monoxide
4. Helium

Q. Explain monatomic, diatomic, and triatomic molecules.

Q. What is the percentage composition of the two elements present in a molecule of hydrochloric acid?

Q.

Statement 1 (S1): Water is an example of molecule of compound.
Statement 2 (S2): Ozone is an example of molecule of element.

1. S1 is true but S2 is false

2. Both S1 and S2 are true

3. Both S1 and S2 are false

4. S1 is false but S2 is true

Q.

Ozone is a molecule made up of oxygen atoms. It can be represented as $O_3$. The atomicity of ozone is 2.

1. True

2. False

Q.

Statement 1 (S1): Water is an example of molecule of compound.
Statement 2 (S2): Ozone is an example of molecule of element.

1. Both S1 and S2 are false

2. S1 is false but S2 is true

3. Both S1 and S2 are true

4. S1 is true but S2 is false

Q. Statement 1 (S1): Atomicity of an ozone molecule is 3.
Statement 2 (S2): Atomicity is calculated only for the molecules of elements.

Q. Define atomicity. What will be the atomicity of ozone and ammonia?

Q. WHAT IS THE DIFFERENCE BETWEEN ATOMIC MASS AND ATOMIC VALENCY

Q. Which amongst the following gases exist as a triatomic molecule?

1. Nitrogen
2. Carbon dioxide
3. Carbon monoxide
4. Helium

Q. Most elements and all compounds exist as molecules.

1. True
2. False

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

Q.

Statement 1 (S1): Water is an example of molecule of compound.
Statement 2 (S2): Ozone is an example of molecule of element.

1. Both S1 and S2 are true

2. Both S1 and S2 are false

3. S1 is true but S2 is false

4. S1 is false but S2 is true

Q.

What is the atomicity of NCl₃.

Q. Explain monatomic, diatomic, and triatomic molecules.

Q. Which of the following statements are true?
(i) An element consists of only one type of particles.
(ii) $H_{2}O$ is a compound.
(iii) Two or more elements chemically combined in a fixed proportion to form a compound.
(iv) NaCl is an element.

A) i, ii, and iii
B) i and iii
C) ii and iv

Q. What is the percentage composition of the two elements present in a molecule of hydrochloric acid?

Q.

A scientist found a new compound Y while working on a new experiment. He represented the compound Y as $Fe{\left(HC{O}_3\right)}_3$. What is its atomicity?

1. 8

2. 16

3. 15
4. 6

Q.

A carbon compound containing only carbon and oxygen has a approximate molecule weight of $290\mathrm{g}$. On analysis, it is found to contain $50\%$ by weight of each element. What is the molecular formula of the compound?

Q.

Identify the following as molecule of an element (ME) or molecule of a compound (MC). Also, arrange the molecules in the ascending order of their atomicity.​

A. Phosphorus ($P_4$)
B. Sulphur dioxide ($S{O}_2$)
C. Bromine ($B{r}_2$)

Arranging the molecules in the ascending order of their atomicity:

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Q. The atomic number of oxygen is:

1. 6
2. 8
3. 10
4. 16

Q. why we consider number of hydrogen, double of no. of atom of oxygen and number of chlorine for valency

Q. If the pH value of a solution is 7, then the solution is said to be _______.

1. acidic
2. neutral
3. highly basic
4. slightly basic

Q. What is the atomicity of nitrogen and hydrogen, respectively?

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

Q.

1. Define atomicity.
2. What will be the atomicity of ozone and ammonia?

Q.

What is meant by the Atomicity of an element? Give some examples of Polyatomic Elements.

Q.

Which of the following exists as molecules?

(i) Nitrogen gas

(ii) Helium

(iii) Water

1. (ii) and (iii)
2. (ii) only
3. (i) and (iii)
4. (i), (ii), and (iii)

Q.

How many molecules and atoms are present in $5O_2$?

1. 5, 2

2. 5, 10

3. 10, 5

4. 2, 5

Q.

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

1. It is a diatomic molecule.

2. It is a polyatomic molecule.

3. It is a triatomic molecule.

4. It is a monoatomic molecule.

Q. The atomicity of the element argon is ______.

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