Assumptions and Limitations of Law of Ocatves

Q.

In the Periodic Table, with increase in atomic number, the metallic character of the elements

1. decreases in a period and increases in a group.

2. increases in a period and decreases in a group.

3. increases both in a period and a group.

4. decreases both in a period and a group.

Q.

Newlands assumed that only 56 elements existed in nature

1. True

2. False

Q.

Among the following which are the two elements that Newlands placed in the same slot and positioned in the same column with fluorine, chlorine and bromine?

1. Cobalt and nickel

2. Cobalt and calcium

3. Nickel and calcium

4. None of these

Q. [TBQ.IV.(1)]
Newlands’ periodic table is based on atomic masses of elements and modern periodic table is based on the atomic number of elements.

Q.

Upto which element, the Law of Octaves was found to be applicable

1. Oxygen

2. Calcium

3. Cobalt

4. Potassium

Q.

Which of the following statements is correct?

1. Law of octaves worked quite well for heavier elements but failed for lighter elements.

2. Law of octaves failed for both lighter elements and heavier elements.

3. Law of octaves worked quite well for lighter elements but failed for heavier elements.

4. Law of octaves was first given by Mendeleev.

Q.

What is the temperature on the farenhite scale at which all the molecular motion nearly stops?

Q. State Newlands law of octaves. Give one of its limitation.

Q.

An element possessing similar properties as cobalt and nickel was placed far away from these elements by Newlands. The element is___.

1. Silver

2. Gold

3. Iron

4. Gallium

Q. Newlands assumed that only 56 elements existed in nature

1. True
2. False