Introduction of Atomic Structure

Q. Can you please tell some important questions with Ans of structure of atom. I don't have any questions. Please. Tomorrow is my exam and I don't have any questions about structure of atom.

Q.

Which of the following is monoatomic molecule?

1. He

2. H

3. Cl₂

4. O₂

Q.

An _______ is a basic unit of matter.

Q.

Match the entries given in column A with appropriate ones from column B
$$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{(A) Invisible atoms}& \text{(a) Rutherford's atomic model}\\ \text{(B) Mass of an atom is concentrated at the centre}& \text{(b) Dalton's atomic theory}\\ \text{(C) Energy levels}& \text{(c) Thomson's atomic model}\\ \text{(D) Plum pudding model}& \text{(d) Bohr's model}\end{array}$$

1. A-b B-a C-c D-d

2. A-a B-b C-d D-c

3. A-b B-c C-d D-a

4. A-b B-a C-d D-c

Q.

State the postulates of daltons atomic theory ?

Describe JJ Thomson experiments on discovery of electrons .

List out the characters of anode rays.

Describe Rutherford model of an atom

Describe the properties of cathode rays

State the conclusion drawn by Alpha ray scattering experiment of Rutherford

Q.

Discuss how the structure of the atom developed over the years. [5 MARKS]

Q.

Who among these was the first to theorize the structure of atoms?

1. J.J Thomson

2. E. Goldstein

3. John Dalton

4. James Chadwick

Q. Question 13
The first model of an atom was given by

(a) N. Bohr
(b) E. Goldstein
​​​​(c) Rutherford
(d) J.J. Thomson

Q. Henrys law establishes a relationship between ________ on the liquid and _________ of the gas dissolved.

1. mass, colour
2. temperature, mass
3. nature, temperature
4. pressure, mass

Q. Which is the positive ion in sodium sulphate?

1. Sulphide ion
2. Sodium ion
3. Sulphate ion
4. Sulphite ion

Q. Which of the following is not a law of chemical combination?

1. Avogadro's Law
2. Law of Multiple Proportions
3. Law of Conservation of volume
4. Law of Definite Proportion

Q.

Match the entries given in column A with appropriate ones from column B

1. A-b B-a C-d D-c

2. A-b B-a C-c D-d

3. A-a B-b C-d D-c

4. A-b B-c C-d D-a

Q. John Dalton stated that atoms are indivisible.

1. False
2. True

Q. Symbolic expression for a molecule is called :

1. chemical formula.
2. molecular formula.
3. atomic formula.
4. None of the above.

Q. Chemical formula of a compound is determined on the basis of __________ of its constituents.

1. number of neutrons
2. valency
3. atomic mass
4. atomic size

Q.

According to __________, during a chemical reaction, the total mass of the products remains equal to that of reactants

1. avogadro's law

2. law of constant proportions

3. law of conservation of mass

4. law of multiple proportions

Q. Write the molecular formulae for the following compounds: Mercury (II) chloride.

Q.

Give two examples where we use cathode rays.

Q.

Discuss how the structure of the atom developed over the years. [5 MARKS]

Q. Which of the following concept was considered in Rutherford's atomic model?

1. The electrical neutrality of atom
2. Electrons revolve around nucleus at a very high speed
3. Existence of nuclear forces of attraction on the electrons.
4. All of the above

Q.

The statements given below are the postulates of various atomic models. Arrange them in chronological order.
(1) Fine structure is due to the presence of subshells in the main energy level
(2) The size of an atom is much larger than the size of its nucleus
(3) As long as the electron is present in a particular orbit, its energy remains constant
(4) Negatively charged particles are uniformly spread in the lump of positive charge

1. $4,3,2,1$

2. $2,3,4,1$

3. $4,2,3,1$

4. $3,4,2,1$

Q. Which amongst the following gases can be classified as compound?

1. Oxygen
2. Nitrogen
3. Hydrogen chloride
4. Chlorine

Q. A scientist while working on an experiment found a compound with chemical formula $Fe(HC{O}_3{)}_3$. What is its atomicity?

1. 16
2. 6
3. 8
4. 15

Q. Which amongst the following is formed when two or more elements are chemically bonded together?

1. Compound
2. Mixture
3. Element
4. Atom