Classification of Elements and Periodicity in Properties MCQ Questions for Class 11 Chemistry Chapter 3 with Answers

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MCQ Questions for Class 11 Chemistry with Answers

Q1. The d-block elements consists mostly of

(i) Monovalent metals
(ii) All non-metals
(iii) Elements which generally form stoichiometric metal oxide
(iv) Many metals with catalytic properties

(iv) Many metals with catalytic properties

Q2. Which of the following is most electronegative?

(i) Carbon
(ii) Silicon
(iii) Lead
(iv) Tin

(i) Carbon

Q3. The element with atomic number 35 belongs to

(i) d – Block
(ii) f – Block
(iii) p – Block
(iv) s – Block

(iii) p – Block

Q4. 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

(i) 81.25
(ii) 162.5
(iii) 91.5
(iv) 45.625

(i) 81.25

Q5. Which of the following has the highest boiling point?

(i) Ne
(ii) Xe
(iii) Ar
(iv) Kr.

(ii) Xe

Q6. According to the periodic law of elements the variation in properties of elements is related to their

(i) nuclear neutron-proton number ratio
(ii) atomic masses
(iii) nuclear masses
(iv) atomic numbers.

v

Q7. Representative elements are those which belong to

(i) p and d – Block
(ii) s and d – Block
(iii) s and p – Block
(iv) s and f – Block

(iii) s and p – Block

Q8. The law of triads is applicable to a group of

(i) Cl, Br, I
(ii) Na, K, Rb
(iii) C, N, O
(iv) H, O, N

(i) Cl, Br, I

Q9. In the periodic table, the element with atomic number 16 will be placed in the group

(i) Third
(ii) Fourth
(iii) Fifth
(iv) Sixth

(iv) Sixth

Q10. Identify the least stable ion amongst the following.

(i) Li
(ii) Be
(iii) B
(iv) Cr

(ii) Be–

Q11. On the Paulings electronegativity scale the element next to F is

(i) N
(ii) Cl
(iii) O
(iv) Ne.

(iii) O

Q12. Johann Doberiner gave the idea of trends among physical and …X… of several groups of three elements. Here, X refers to

(i) chemical properties
(ii) atomic number
(iii) atomic mass
(iv) None of these

(i) chemical properties

Q13. Which pair of elements belongs to same group?

(i) Elements with atomic no. 17 and 38
(ii) Elements with atomic no. 20 and 40
(iii) Elements with atomic no. 17 and 53
(iv) Elements with atomic no. 11 and 33

(iii) Elements with atomic no. 17 and 53

Q14. Eka-alurninium and Eka-silicon are known as

(i) GalliAn and germanium
(ii) Aluminium and silicon
(iii) Iron and sulphur
(iv) Neutron and magnesium

(i) GalliAn and germanium

Q15. In the modern periodic table, the period indicates the value of:

(i) Atomic Number
(ii) Atomic Mass
(iii) Principal Quantum Number
(iv) Azimuthal Quantum Number

(iii) Principal Quantum Number

Q16. Newlands could classify elements only upto

(i) calcium
(ii) copper
(iii) chlorine
(iv) chromium

(i) calcium

Q17. In the third period of the Periodic Table the element having smallest size is

(i) Na
(ii) Ar
(iii) Cl
(iv) Si

(ii) Ar

Q18. In which of the following compounds does che ratio of the anion si/e to cation size has the lowest value?

(i) CsI
(ii) Li I
(iii) LiF
(iv) CsF

(iv) CsF

Q19. The reduction in atomic size with increase in atomic number is a characteristic of elements of-

(i) d−block
(ii) f−block
(iii) Radioactive series
(iv) High atomic masses

(ii) f−block

Q20. Lothar Meyer plotted the physical properties such as atomic volume, melting point and …X… against atomic weight. Here, X refers to

(i) boiling point
(ii) None of these
(iii) mass
(iv) surface tension

(i) boiling point

Q21. The elements which occupy the peaks of ionisation energy curve, are

(i) Na, K, Rb, Cs
(ii) Na, Mg, Cl, I
(iii) Cl, Br, I, F
(iv) He, Ne, Ar, Kr

(iv) He, Ne, Ar, Kr

Q22. Total number of elements present in the 3rd period is

(i) 6
(ii) 32
(iii) 18
(iv) 8

(iv) 8

Q23. Which of the following forms the most stable gaseous negative ion?

(i) F
(ii) Cl
(iii) Br
(iv) I

(ii) Cl

Q24. Mendeleev classified elements in

(i) seven periods and nine groups
(ii) eight periods and seven groups
(iii) eight periods and eight groups
(iv) increasing order of atomic groups

(i) seven periods and nine groups

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MCQ Questions for Class 11 Chemistry Chapter wise with Answers

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