CBSE Class 11 Chemistry Classification of Elements and Periodicity in Properties MCQs

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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CBSE MCQs Chemistry Class 11 Chapter 3 Classification of Elements and Periodicity in Properties

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