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Published on: 26/05/2021
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Questions + Answers key
Take MCQ Science Test1.
Arrange the following elements in the order of their increasing nonmetallic character : Li, O, C, Be, F
F<O<C<Be<Li
Li<Be<C<O<F
F<O<C<Be<Li
F<O<Be<C<Li
2.
According to Mendeleev's Periodic Law, the elements were arranged in the periodic table in the order of
increasing atomic number
decreasing atomic number
increasing atomic masses
decreasing atomic masses
3.
Upto which element, the Law of Octaves was found to be applicable
Oxygen
Calcium
Cobalt
Potassium
4.
Element X forms a chloride with the formula XCl2 , which is a solid a high melting point. X would most likely be in the same group of the Periodic Table as :
Na
Mg
Al
Si
5.
Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic Table?
The elements become less metallic in nature.
The number of valence electrons increases.
The atoms lose their electrons more easily.
The oxides become more acidic.
1.
(b)
Li<Be<C<O<F
2.
(c)
increasing atomic masses
3.
(b)
Calcium
4.
(b)
Mg
5.
(c)
The atoms lose their electrons more easily.
10th Standard CBSE Syllabus & Materials
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