Refer to CBSE Class 11 Chemistry Classification of Elements and Periodicity in Properties MCQs provided below available for download in Pdf. The MCQ Questions for Class 11 Chemistry with answers are aligned as per the latest syllabus and exam pattern suggested by CBSE, NCERT and KVS. Multiple Choice Questions for Chapter 3 Classification of Elements and Periodicity in Properties are an important part of exams for Class 11 Chemistry and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for CBSE Class 11 Chemistry and also download more latest study material for all subjects
MCQ for Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties
Class 11 Chemistry students should refer to the following multiple-choice questions with answers for Chapter 3 Classification of Elements and Periodicity in Properties in Class 11.
Chapter 3 Classification of Elements and Periodicity in Properties MCQ Questions Class 11 Chemistry with Answers
Question : Periodic classification of elements is used to examine the
a) Both
b) periodic trends in physical properties of elements
c) periodic trends in chemical properties of elements
d) None of these
Answer : Both
Question : Cl, Br, I, if this is Dobereiner’s triad and the atomic masses of Cl and I are 35.5 and 127 respectively the atomic mass of Br is
a) 81.25
b) 162.5
c) 91.5
d) 45.625
Answer : 81.25
Question : If the two members of a Dobereiner triad are phosphorus and antimony, the third member of this triad is
a) arsenic
b) iodine
c) sulphur
d) calcium
Answer : arsenic
Question : The law of triads is applicable to a group of
a) Cl, Br, I
b) Na, K, Rb
c) C, N, O
d) H, O, N
Answer : Cl, Br, I
Question : In 1800, only _____X _____ elements were known. Here, X refers to
a) 31
b) 92
c) 63
d) None of these
Answer : 31
Question : Johann Doberiner gave the idea of trends among physical and ...X... of several groups of three elements. Here, X refers to
a) chemical properties
b) atomic number
c) atomic mass
d) None of these
Answer : chemical properties
Question : Which of the following is the correct set of elements to Dobereiner’s triads ?
a)
b)
c) Data insufficient
d)
Answer :
Question : On which of the following Dobereiner’s Triad law is not applicable?
a) F, Cl, Br
b) Cl, Br, I
c) Ca, Sr, B
d) Li, Na, K
Answer : F, Cl, Br
Question : Newlands could classify elements only upto
a) calcium
b) copper
c) chlorine
d) chromium
Answer : calcium
Question : According to Newlands theory, when elements are arranged in the order of increasing atomic weight which number element had similar properties to the first element.
a) eighth
b) third
c) seventh
d) sixth
Answer : eighth
Question : Lothar Meyer plotted the physical properties such as atomic volume, melting point and ...X... against atomic weight. Here, X refers to
a) boiling point
b) None of these
c) mass
d) surface tension
Answer : boiling point
Question : The most significant contribution towards the development of periodic table was made by
a) Mendeleev
b) Dalton
c) Avogadro
d) Cavendish
Answer : Mendeleev
Question : Noble gases were included in Mendeleev’s periodic table in the
a) None of these
b) 7th group
c) 1st group
d) 8th group
Answer : None of these
Question : Mendeleev classified elements in
a) seven periods and nine groups
b) eight periods and seven groups
c) eight periods and eight groups
d) increasing order of atomic groups
Answer : seven periods and nine groups
Question : Select the correct chronological order for the discoveries of the following scientists.
Dobereiner, Newlands, Chancourtois, Mendeleev
a) Dobereiner, Chancourtois, Newlands, Mendeleev
b) Dobereiner, Newlands, Chancourtois, Mendeleev
c) Chancourtois, Newlands, Dobereiner, Mendeleev
d) Chancourtois, Dobereiner, Newlands, Mendeleev
Answer : Dobereiner, Chancourtois, Newlands, Mendeleev
Question : Who developed long form of the periodic table?
a) Neils Bohr
b) Moseley
c) Lothar Meyer
d) Mendeleev
Answer : Neils Bohr
Question : At present, how many elements are known
a) 118
b) 112
c) 110
d) 113
Answer : 118
Question : Which of the scientists given below discovered that periodic table should be based on the atomic number ?
a) Moseley
b) Mendeleev
c) Newlands
d) Lothar Meyer
Answer : Moseley
Question : How many elements are there in 6th period of periodic table?
a) 32
b) 8
c) 18
d) 30
Answer : 32
Question : Modern periodic table is based on the atomic number of the elements. The experiment which proved the significance of the atomic number was
a) Mosley’s work on X-ray spectra
b) Bragg’s work on X-ray diffraction
c) Discovery of X-rays by Rontgen
d) Mulliken’s oil drop experiment
Answer : Mosley’s work on X-ray spectra
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MCQs for Chapter 3 Classification of Elements and Periodicity in Properties Chemistry Class 11
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