CBSE Class 10 Science Chapter 5 Periodic Classification of Elements MCQ Questions with Answers
Periodic Classification of Elements MCQs – Here is a compilation of Free Class 10 Science MCQs Chapter 5 Periodic Classification of Elements. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. At the end of Multiple Choice Questions, the answer key has also been provided for your reference. Take Free Online MCQs Test For Class 10.
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Q1- Vertical columns are called as –
A) groups
B) periods
C) rows
D) none
Q2- How many groups are there in the periodic table?
A) 18
B) 8
C) 28
D) 17
Q3- Which group was added in Mendleev’s periodic table?
A) I group
B) VIII group
C) zero group
D) V group
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Q4- What is the special name given to the 17th group?
A) chalcogens
B) halogens
C) alkali metals
D) inert gases
Q5- Chalcogens are ?
A) ore forming
B) salt forming
C) hydroxide forming
D) None
Q6- Atomic mass is equal to the sum of ____.
A) P+N
B) P+E
C) Number of Protons
D) Number of neutrons
Q7- Name the most electronegative element of Periodic table ?
A) Chlorine
B) Bromine
C) Fluorine
D) Iodine
Q8- Electron affinity is ____.
A) always negative
B) always positive
C) can be negative or positive
D) zero
Q9- Ionisation energy is measured in –
A) KJ/g
B) J/mole
C) KJ/mol
D) none
Q10- Out of Mg and Al which has higher ionisation energy?
A) Mg
B) Al
C) Both have same
D) None
Q11- Write valency of Iron ?
A) 2
B) 3
C) 0
D) 2,3
Q12- Out of F and Cl, which has higher electron affinity ?
A) Cl
B) F
C) Both have same
D) none
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Q13- Upto which element, the law of octaves was found to be applicable –
A) Oxygen
B) Calcium
C) Cobalt
D) Potassium
Q14- According to Mendeleev’s Periodic law, the elements were arranged in Periodic table according to –
A) Increasing atomic number
B) decreasing atomic number
C) Increasing atomic masses
D) decreasing atomic masses
Q15- In Mendeleev’s Periodic table, gaps were left for many elements. Pick any one out of them.
A) Germanium
B) Chlorine
C) Oxygen
D) Silicon
Q16- What relation do Ar and Ca have?
A) isotopes
B) isoelectronic
C) isobars
D) isotones
Q17- Isotopes possess –
A) same number of Protons
B) same number of neutrons
C) same mass number
D) none
Q18- On which factor does ionisation energy depend?
A) Size of an atom
B) nuclear charge
C) electronic configuration
D) all
Q19- Pick out the odd one –
A) Argon
B) neon
C) Barium
D) helium
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Q20- Which is biggest in size –
A) Lithium
B) sodium
C) Magnesium
D) potassium
Q21- Which out of them is not a halogen?
A) Fluorine
B) Chlorine
C) Iodine
D) Germanium
Q22- The standard element chosen for relative atomic mass is __.
A) Carbon-12
B) Hydrogen-1
C) chlorine -35
D) Iodine -121
Q23- Electronegativity depends upon ?
A) size of an atom
B) nuclear charge on atom
C) electrons in an atom
D) all
Q24- The order of ionisation of alkali group follows which order?
A) Li>Na>K>Rb>Cs
B) Li<Na>K<Rb>Cs
C) Li<Na<K<Rb<Cs
D) Li>Na<K>Rb<Cs
Q25- Most electronegative element in group 2 is __.
A) Be
B) Mg
C) Al
D) Ca
Q26- Which of the given elements A,B,C,D and E with atomic numbers 2,3,7,10 and 30 belong to the same period?
A) A,B,C
B) B,C,D
C) A,D,E
D) B,D,E
Q27- The elements A,B,C,D,E have atomic numbers 9, 11, 17, 12and 13. Which elements belong to the same group?
A) A and B
B) B and D
C) A and C
D) D and E
Q28- Where would you locate the element with electronic configuration 2,8 in modern periodic table?
A) group 8
B) group 2
C) group 18
D) group 16
Q29- An element which is an essential constituent of all organic compounds belongs to ___.
A) group 1
B) group 14
C) group 15
D) group16
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Q30- Which one will have the maximum number of valence electrons ?
A) Na
B) Al
C) Si
D) P
Q31- What type of oxide would eka-Aluminium form ?
A) EO₃
B) E₃O₂
C) E₂O₃
D) EO
Q32- The element with atomic number 14 is hard and forms acidic oxide and a covalent halide . To which of the category does it belong?
A) metal
B) Metalloid
C) Non metal
D) Left hand side element
Q33- The law of octaves is given by ___.
A) Mendeleev
B) Newlands
C) Bohr
D) Mosley
Q34- The modern periodic table is given by ____.
A) Mendeleev
B) Newlands
C) Bohr
D) Mosley
Q35- Which element was not known when Mendeleev proposed the classification?
A) Hydrogen
B) Sodium
C) Copper
D) Germanium
Q36- Three elements B,Si and Ge are ___.
A) Metals
B) Non metals
C) Metalloids
D) Metal,non metal ,metalloid respectively
Q37- Arrange the following elements in order of their increasing non metallic character Li,O,C,Be ,F?
A) F<O<C<Be<Li
B) Li<Be<C<O<F
C) F<O<C<Be<Li
D) F<O<Be<C<Li
Q38- Arrange the following elements in order of their increasing metallic character Na,Si,Cl,Mg,Al ?
A) Cl>Si>Al>Mg>Na
B) Na>Mg>Al>Si>Cl
C) Na>Al>Mg>Cl>Si
D) Al>Na>Si>Ca>Mg
Q39- Which of them doesn’t loose electrons easily?
A) Na
B) F
C) Mg
D) Al
Q40- Which will loose electron easily?
A) Mg
B) Na
C) K
D) Ca
Q41- Which out of them has the biggest radii?
A) Na
B) Mg
C) K
D) Ca
Q42- Which of the following gives the correct order of atomic radii of O, F and N?
A) O,F,N
B) N,F,O
C) O,N,F
D) F,O,N
Q43- Which of the following, in their outermost shell has 2 valence electrons?
A) K shell
B) L shell
C) M shell
D) N shell
Q44- Element X forms the chloride with the formula XCl2 ,which is a solid with a high melting point. X is most likely to be in the same group of periodic table as –
A) Na
B) Mg
C) Al
D) Si
Q45- Which set out of them shows the correct sequence of metallic characters?
A) Be ,Mg,Ca
B) Na,Li,K
C) Mg,Al,Si
D) C,O,N
Q46- On moving from left to right in a periodic table, size of an atom ?
A) Increases
B) Decreases
C) Does not change
D) First increases then decreases
Q47- Which of the following elements will form acidic oxide?
A) with atomic number 7
B) with atomic number 3
C) with atomic number 12
D) with atomic number 19
Q48- Which statement is correct for left to right movement in periodic table?
A) elements become less metallic from left to right
B) number of valence electrons increases
C) atoms lose electrons easily
D) oxides become more acidic
Q49- In periodic table, Helium is placed at ___
A) top left corner
B) bottom right corner
C) bottom left corner
D) top right corner
Q50- The number of electrons in valence shell is equal to –
A) Atomic mass
B) Group number
C) period number
D) Atomic volume
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Answer Key for Class 10 Science Book Chapter 5 Periodic Classification of Elements MCQs
| Q. No. | Ans. | Q. No. | Ans. | Q. No. | Ans. | Q. No. | Ans. | Q. No. | Ans. |
| 1 | A | 11 | D | 21 | D | 31 | C | 41 | C |
| 2 | A | 12 | A | 22 | A | 32 | B | 42 | D |
| 3 | C | 13 | B | 23 | D | 33 | B | 43 | A |
| 4 | B | 14 | C | 24 | D | 34 | C | 44 | B |
| 5 | A | 15 | A | 25 | A | 35 | C | 45 | A |
| 6 | A | 16 | C | 26 | B | 36 | C | 46 | B |
| 7 | C | 17 | A | 27 | A | 37 | C | 47 | D |
| 8 | C | 18 | D | 28 | C | 38 | B | 48 | C |
| 9 | C | 19 | C | 29 | B | 39 | B | 49 | D |
| 10 | B | 20 | D | 30 | D | 40 | C | 50 | B |
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