Q 1 – Carbon belongs to the 2nd period of group 14. Silicon belongs to the 3rd period of group 14. If the atomic number of carbon is 6, the atomic number of silicon is ____.
(a) 7
(b) 14
(c) 24
(d) 16
Ans – (b) 14
Q 2 – The law of the modern periodic table was proposed by:
(a) H.G.I Moselly
(b) Dobereincer
(c) D.I. Mendeleev
(d) Newlands
(a) H.G.I Moselly
Q 3 – Atomic numbers were discovered by ____.
(a) Moseley
(b) Mendeleev
(c) Rutherford
(d) Newlands
(a) Moseley
Q 4 – Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?
(a) The oxides become more acidic
(b) The elements become less metallic
(c) There is an increase in the number of valence electrons
(d) The atoms lose their electrons more easily
(d) The atoms lose their electrons more easily
Q 5 – The longest and the shortest periods are:
a. 1&6
b. 2&6
c. 6 &1
d. 1&7
b. 2&6
Q 6 – Which of the following is a metalloid?
(a) AI
(b) S
(c) Si
(d) C
Q 6 – Which of the following is a metalloid?
(a) AI
(b) S
(c) Si
(d) C
(c) Si
Q 7 – Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl .
(a) Helium
(b) Argon
(c) Neon
(d) Krypton
(b) Argon
Q 8 – How many elements are placed in lanthanide and actinide series?
(a) 57, 89
(b) 14, 14
(c) 89, 57
(d) 14, 16
(b) 14, 14
Q 9 – In the periodic table rubidium and radium are present in groups____ respectively.
(a) 1 and 2
(b) 1 and 3
(c) 3 and 5
(d) 1 and 5
(a) 1 and 2
Q 10 – Which of the following elements of noble gases participate in a chemical reactions?
(a) Kr, Rn
(b) He, Kr
(c) Rn, He
(d) He, Ne
(a) Kr, Rn
Q 11 – The elements of group 16 are called
(a) Chalcogens
(b) Halogens
(c) Pnicogens
(d) Noble gases
(a) Chalcogens
Q 12 – Metalloids combine with oxygen to form ____ oxides.
(a) acidic
(b) basic
(c) amphoteric
(d) neutral
(b) basic
Q 13 – Chlorine (17) belongs to which group and period
(a) 7, 3
(b) 17, 3
(c) 1, 3
(d) 16, 3
(b) 17, 3
Q 14 – Which of the following periods contain solid, liquid and gaseous elements?
(a) Fifth period
(b) Second period
(c) Fourth period
(d) Third period
(b) Second period
Q 15 – Which of the following sets of elements do not belong to the same group?
(a) F, Cl, Br
(b) Na, K, Rb
(c) P, S, Cl
(d) C, Si, Ge
(c) P, S, Cl
Q 16 – The pairs of elements with the following atomic numbers have the same chemical properties:
a. 13 & 12
b. 3 &11
c. 4&24
d. 2 &1
c. 4 & 24
Q 17 – The atomic size of the elements of group I ____ as we move down the group.
(a) increases
(b) decreases
(c) remains same
(d) increases first and then decreases
(a) increases
Q 18 – The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
(a) Metal
(b) Metalloid
(c) Non-metal
(d) Left-hand side element
(b) Metalloid
Q 19 – Which of the following statements about the Modern Periodic Table is correct?
(a) It has 18 horizontal rows known as Periods
(b) It has 7 vertical columns known as Periods
(c) It has 18 vertical columns known as Groups
(d) It has 7 horizontal rows known as Groups
(c) It has 18 vertical columns known as Groups
Q 20 – Elements with atomic number 15 and mass number 31 is present in:
a. Group 5 and period 4
b. Group 5 and period 3
c. Group 15 and period 3
d. Group 15 and period 4
c. Group 15 and period 3
Q 21 – Modern Periodic law is based upon:
(a) Number of neutrons
(b) Number of electron
(c) Atomic number
(d) Atomic mass
(c) Atomic number
Q 22 – Which amongst the following represents the correct order of decreasing metallic character of elements Na, Si, Cl, Mg, Al
a. Cl> Si> Al> Mg> Na
b. Na> Mg> Al> Si> Cl
c. Na> Si> Mg> Al> Cl
d. Al> Na> Si> Cl> Mg
b. Na> Mg> Al> Si> Cl
Q 23 – In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a
place in the periodic table later ?
(a) Germanium
(b) Chlorine
(c) Oxygen
(d) Silicon
(a) Germanium
Q 24 – Which of the following are characteristics of isotopes of an element?
a. Isotopes of an element have same atomic masses
b. Isotopes of an element have same atomic number
c. Isotopes of an element show the same physical properties
d. Isotopes of an element have the same chemical properties
i. A, c, d
ii. B, c, d
iii. B and c
iv. B and d
iii. B and c
Q 25 – Which of the given elements A, B , C, D and E with atomic numbers 2, 4, 8, 10 and 18 respectively belong to the same period?
a. A, B, C
b. B, C, D
c. A, D, E
d. B, D, E
b. B, C, D
Q 26 – Which of the following set of elements is written in order of their increasing metallic character?
(a) Na Li K
(b) C Q N
(c) Mg Al Si
(d) Be Mg Ca
(d) Be Mg Ca
Q 27 – Which of the following hydroxides are most basic:
a. Be(OH) 2
b. Mg(OH) 2
c. Ca(OH) 2
d. Ba(OH) 2
d. Ba(OH) 2
Q 28 – The non-metals are present:
(a) On the right-hand side of the periodic table.
(b) In the middle of the periodic table.
(c) In the centre of the periodic table.
(d) On the left-hand side of the periodic table.
(a) On the right-hand side of the periodic table.
Q 29 – Which of the following is the correct order of size:
a. Cl< F< Br< I
b. F< Cl< Br< I
c. I<Br< Cl< F
d. Br< I< Cl< F
b. F < Cl < Br < I
Q 30 – An element has 12 protons. The group and period to which this element belongs to is
(a) 2nd group, 3rd period
(b) 2nd group, 2nd period
(c) 3rd group, 2nd period
(d) 3rd group, 3rd period
(a) 2nd group, 3rd period
Q 31 – In the modern periodic table which one of the following does not have an appropriate position ?
(A) Transition elements
(B) Inert gases
(C) Inner transition elements
(D) Halogens
(C) Inner transition elements
Q 32 – Which of the following statements is not true for noble gases ?
(A) They have stable configuration.
(B) All of them contain eight electrons in their outermost shell except helium.
(C) They are the zero group elements.
(D) They are coloured.
(D) They are coloured.
Q 33 – An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. Write the formula of the compound formed when X reacts with chlorine.
(a) XCl3
(b) XCl
(c) XCl2
(d) XCl5
(c) XCl2
Q 34 – The noble gases among the following are –
(A) hydrogen, nitrogen and oxygen
(B) fluorine, chlorine and bromine
(C) helium, neon and argon
(D) sodium, potassium and calcium
(C) helium, neon and argon
Q 35 – Which of the following pairs of elements does not belong to the same group?
(A) Cl, Br
(B) N, P
(C) Mg, Ca
(D) Al, Si
(D) Al, Si
Q 36 – An element ‘A’ belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.
(a) Valency = 6
(b) Valency = 2
(c) Valency = 1
(d) Valency = 3
(b) Valency = 2
Q 37 – Elements in the same vertical group of the periodic table have same –
(A) Number of electrons
(B) Atomic number
(C) Number of valence electrons
(D) Electronic configuration
(C) Number of valence electrons
Q 38 – Which of the following pairs has both members from the same group of periodic table ?
(A) Mg, Ba
(B) Mg, Na
(C) Mg, Cu
(D) Mg, Cl
(A) Mg, Ba
Q 39 – Which of the following is the outermost shell for elements of the second period?
(a) K shell
(b) L shell
(c) M shell
(d) N shell
(b) L shell
Q 40 – The atom having smallest size from Na, Si, Cl and Ar is –
(A) Na
(B) Cl
(C) Si
(D) Ar
(D) Ar
Q 41 – Dobereiner’s triad arranged the elements with similar properties into:
(a) Periods
(b) Groups
(c) Both period and group
(d) None of these
(b) Groups
Q 42 – Element X forms a chloride with the formula XCl2 , which is a solid with high melting point. X would most likely be:
(a) Si
(b) Al
(c) Na
(d) Mg
(d) Mg
Q 43 – Which of the following is the smallest in size ?
(A) Na+
(B) Ne
(C) Mg+2
(D) all have equal size
(C) Mg+2
Q 44 – Pick out the chemically most reactive elements from the given triads.
Li, Na, K F, Cl, Br
(a) Li and F
(b) Li and Br
(c) K and F
(d) K and Br
(c) K and F
Q 45 – The correct order of atomic radii is –
(A) Na < Be < B
(B) F– < O2– < N3–
(C) Na < Li < K
(D) Fe3+ < Fe2+ < Fe4+
(b) (iii) and (iv)
Q 46 – What is the atomic number of element of period 3 and group 17 of the Periodic Table?
(a) 10
(b) 4
(c) 17
(d) 21
(c) 17
Q 47 – Which among the following has the largest size ?
(A) Rb+
(B) Mg+2
(C) Li+
(D) Sr+2
(A) Rb+
Q 48 – An atom of an element has the electronic configuration 2, 8, 2. To which group does it belong?
(a) 4th group
(b) 6th group
(c) 3rd group
(d) 2nd group
(d) 2nd group
Q 49 – The most distinctive property of the noble gases is that they are:
(a) Unreactive
(b) Radioactive
(c) Metalloid
(d) Metallic
(a) Unreactive
Q 50 – The statement that is not correct for the periodic classification of elements is :
(A) The properties of elements are periodic functions of their atomic number
(B) Non-metallic elements are lesser in number than metallic elements
(C) The first ionization energies of the elements along the period do not vary in a regular manner with the increase in atomic number.
(D) For transition elements the d-subshells are filled with electrons monotonically with increase in atomic number.
(C) The first ionization energies of the elements along the period do not vary in a regular manner with the increase in atomic number.
Q 51 – Upto which element, the Law of Octaves was found applicable?
(a) Oxygen
(b) Calcium
(c) Cobalt
(d) Potassium
(b) Calcium
Q 52 – The arrangement of elements in the Modem Periodic Table is based on their
(a) increasing atomic mass in the period
(b) increasing atomic number in the horizontal rows
(c) increasing atomic number in the vertical columns
(d) increasing atomic mass in the group
(b) increasing atomic number in the horizontal rows
Q 53 – Which set of elements have nearly the same atomic radii:
(A) F, Cl, Br, I
(B) Na, K, Rb, Cs
(C) Li, Be, B, C
(D) Fe, Co, Ni, Cu
(D) Fe, Co, Ni, Cu
Q 54 – In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a
place in the Periodic Table later?
(a) Chlorine
(b) Silicon
(c) Oxygen
(d) Germanium
(d) Germanium
(Q 55 to Q 59 )– Assertion: There are 118 elements discovered so far.
Reason: Sulphur (16) belongs to Group 16 and belongs to 3rd period.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
(b) Both A and R are true but R is not the correct explanation of A.
Q 56. Assertion: Group 1 and 2 element all are metals.
Reason: Group 1 and 2 elements can lose electrons early to form cations (positive ions)
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
Q 57. Assertion: B(5) belongs to group 13 and silicon belongs to group 14
Reason: B2O3 is acidic oxide where SiO2 is amphoteric oxide.
(b) Both A and R are true but R is not the correct explanation of A.
Q 58. Assertion: K is more reactive than Na.
Reason: K is smaller in size than Na.
(c) A is true but R is false.
Q 59. Assertion: Fluorine is more reactive than chlorine.
Reason: Fluorine and chlorine belong to Group 17 called Halogen.
(b) Both A and R are true but R is not the correct explanation of A.
Q 60 – The correct order for decreasing atomic radius of the five atoms H, Br, I, He and S is –
(A) I > Br > S > He > H
(B) I > S > Br > H > He
(C) I > S > Br > He > H
(D) Br > I > S > He > H
(A) I > Br > S > He > H