List two main achievements of Mendeleev's periodic table.

Important Questions on Periodic Classification of Elements

EASY

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 3

Which property of elements was used by Mendeleev to classify the elements?

EASY

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 4

What name was given to the then undiscovered element 'Germanium'? (Eka-silicon/ Eka-boron)

EASY

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 5

Name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses. 

MEDIUM

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 6

Where Mendeleev placed the noble gases, after their discovery, in his periodic table? Was the original order of elements disturbed?

MEDIUM

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 7

P, Q and R are the elements of a Dobereiner's triad. What should be the atomic mass of Q, if the atomic mass of P is $7$ and that of R is $39$?.

MEDIUM

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 8

A and B are the two elements having similar properties and obeying Newland's law of octaves. How many elements are there in between A and B?

MEDIUM

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 9

Write two anomalies of Mendeleev's classification of elements.

HARD

10th CBSE

IMPORTANT

New Millenium Science - Chemistry Class X>Chapter 5 - Periodic Classification of Elements>PRACTICE QUESTIONS SET>Q 10

How do the properties of eka-aluminium predicted by Mendeleev resemble with that of Gallium discovered later?