No. of questions - 27
Time - 15 min
1.
The horizontal rows in modern periodic table are called
2.
Who gave the idea for the first time to classify elements as per their physical and chemical properties?
3.
How many naturally occurring elements are there in periodic table?
4.
Mendeleev's periodic law states that:
5.
According to Modern Periodic Law:
6.
The number of elements present in the 2nd , 3rd , 4th , 5th and 6th periods respectively are:
7.
The noble gases were placed in group of Mendeleev's classification?
8.
Which of the following period of the long form of Modern periodic table contains Actinoid?
9.
How many horizontal rows were there in Mendeleev's periodic classification?
10.
Which was the incomplete period in the long form of the Modern period table?
11.
How many groups are there in modern periodic table?
12.
According to Dobereiner, group of three element is known as
13.
Lothar Mayer curve was plotted between
14.
Who showed that the atomic number is more fundamental property of an element than it’s atomic mass?
15.
How many periods are there in modern periodic table?
16.
In Modern Periodic Table, Henry Moseley observed regularities in the characteristic spectra.
17.
Which shows the demerit of Mendeleev’s periodic table?
18.
The elements having similar chemical properties are placed in ?
19.
In which of the following, the elements having similar outer electronic configurations are arranged/placed?
20.
Newland's law of octaves seemed to be true only for elements upto .
21.
The number of lanthanoids and actinoid respectively present in the sixth and seventh periods are:
22.
Which shows merit of Mendeleev’s periodic table?
23.
The number of element present in first period of Modern periodic table is:
24.
"Modern Periodic Law" is the modification of
25.
Which of the following period of Modern periodic table contain lanthanoids?
26.
What is/are the drawbacks of Mendeleev's periodic table?
27.
How many elements were placed in VIII group of Mendelev’s periodic table ?
