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question_answer1)
Why are elements classified?
A)
To enable a better understanding on fundamental properties of elements. done
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B)
To find a place for each element and know about its relationship with other elements. done
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C)
To understand each element in a better way based on various observations. done
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D)
All of the above done
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question_answer2)
Three elements P, Q, R form a Dobereiner triad. The atomic weights of P and R are 35 and 127 respectively. Find the atomic weight of Q.
A)
40 done
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B)
60 done
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C)
81 done
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D)
120 done
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question_answer3)
The arrangement of elements in the modern periodic table is based on their
A)
electronic configuration. done
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B)
atomic size. done
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C)
atomic number. done
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D)
atomic mass. done
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question_answer4)
Which one of the following is a Dobereiner triad?
A)
C, Mg and Na done
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B)
O, N and Cl done
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C)
Li, Na and K done
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D)
Fe, Cu, Zn done
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question_answer5)
Three elements X, Y and Z form a m Dobereiner triad. Their atomic weights are in the ratio 5 : 11 : 17. If the sum of the atomic weights of extreme elements is 176, then find the atomic weights of X, Y and Z.
A)
B)
C)
D)
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question_answer6)
Which period is the longest in the periodic table?
A)
Third done
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B)
Fourth done
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C)
Sixth done
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D)
Seventh done
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question_answer7)
Which elements in the periodic table are chemically inactive?
A)
Representative elements done
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B)
Inert gases done
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C)
Transitional elements done
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D)
Inner transitional elements done
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question_answer8)
Find the atomic number of an element belonging to group IA and the 3rd period in the periodic table.
A)
3 done
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B)
11 done
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C)
19 done
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D)
20 done
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question_answer9)
Which of the given elements have incompletely filled outermost shells?
A)
Halogens done
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B)
Transitional elements done
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C)
Representative elements done
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D)
Noble gases done
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question_answer10)
According to Modern periodic law, the properties of elements are the periodic functions of 'X' ; Identify 'X'.
A)
Atomic masses of elements. done
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B)
Atomic volumes of elements. done
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C)
Atomic numbers of elements. done
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D)
Densities of elements. done
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question_answer11)
Which set of elements in the periodic table are called metalloids?
A)
Boron, silicon, germanium, arsenic done
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B)
Antimony, tellurium, polonium done
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C)
Aluminium, gallium, indium done
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D)
Both (a) and (b) done
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question_answer12)
Which type of electrons determine the nature and type of bonds formed by an element?
A)
Electrons in 's' orbital done
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B)
Electrons in valence shell done
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C)
Electrons in 'p' orbital done
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D)
Electrons in 'd' and 'f' orbitals done
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question_answer13)
As we move from left to right in a period, which of the given properties decrease?
A)
Atomic radius done
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B)
Electropositivity done
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C)
Metallic character done
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D)
All of the above done
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question_answer14)
Which one of the following is a diagonally related pair?
A)
H, Be done
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B)
Na, Mg done
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C)
B, Si done
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D)
K, Ca done
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question_answer15)
What are the advantages of using a periodic table?
A)
All the elements can be seen at a glance. done
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B)
Different colours represent various forms of elements. done
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C)
It is easy to memorize the properties of elements. done
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D)
All of the above done
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question_answer16)
Which of the given atomic numbers, relate to a metal?
A)
34 done
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B)
36 done
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C)
38 done
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D)
32 done
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question_answer17)
Which element(s) of Group-I can form basic oxides?
(i) Li |
(ii) \[Na\] |
(iii) K |
A)
Only (i) and (ii) done
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B)
Only (ii) and (iii) done
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C)
Only (i) and (iii) done
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D)
(i), (ii) and (iii) done
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question_answer18)
Identify the electronic configuration of a compound formed when a metal reacts with a halogen.
A)
10, 18 = 28 done
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B)
12, 9 = 21 done
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C)
7, 9 = 16 done
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D)
19, 17 = 36 done
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question_answer19)
An element 'P' bonds with chlorine to form an acid. Identify 'P'.
A)
\[{{O}_{2}}\] done
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B)
\[{{H}_{2}}\] done
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C)
\[{{N}_{2}}\] done
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D)
Ca done
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question_answer20)
Which element is more electronegative among halogens?
A)
Br done
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B)
\[Cl\] done
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C)
F done
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D)
\[I\] done
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question_answer21)
Why does atomic size increase in a group?
A)
Due to the addition of more electrons done
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B)
Due to decrease in number of protons done
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C)
Due to the addition of an extra shell done
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D)
All of the above done
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question_answer22)
Eka-aluminium predicted by Mendeleef is
A)
Scandium. done
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B)
Gallium. done
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C)
Germanium. done
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D)
Tellurium. done
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question_answer23)
In which block, the metals are placed in the long form of periodic table?
A)
's' block done
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B)
'p' block done
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C)
'd' block done
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D)
'f' block done
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question_answer24)
Which pair of atomic numbers belong to p-block elements?
A)
3, 5 done
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B)
11, 12 done
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C)
4, 5 done
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D)
7, 8 done
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question_answer25)
Element 'X' forms a chloride with the formula \[XC{{l}_{2}}\], which is a solid with high melting point. Identify X.
A)
Na done
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B)
\[Al\] done
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C)
Mg done
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D)
Si done
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question_answer26)
Which pair of elements have similar chemical behaviour?
A)
Sodium and Aluminium done
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B)
Argon and Potassium done
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C)
Nitrogen and Phosphorus done
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D)
Boron and Germanium done
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question_answer27)
Which of the following pairs of elements have the same number of valence electrons?
A)
\[Zn,O\] done
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B)
\[Cl,S\] done
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C)
\[\text{Na,Ca}\] done
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D)
\[C,\,Ge\] done
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question_answer28)
The ores of an element 'X' are generally found in the earth's crust and its oxides give strong alkalis. To which group does 'X' belong to?
A)
I A group done
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B)
II A group done
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C)
III A group done
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D)
IV A group done
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question_answer29)
What is the range of atomic numbers of lanthanoid series of elements?
A)
90-103 done
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B)
89-102 done
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C)
58-71 done
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D)
71-103 done
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question_answer30)
Identify the set of inert gases.
A)
Oxygen, nitrogen, hydrogen done
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B)
Fluorine, chlorine, bromine done
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C)
Neon, argon, krypton done
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D)
All of the above done
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question_answer31)
How many electrons are there in the outermost orbit of each element in IA. group?
A)
1 done
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B)
2 done
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C)
3 done
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D)
7 done
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question_answer32)
Which of the following is a transitional element?
A)
Pb done
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B)
As done
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C)
Al done
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D)
Ni done
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question_answer33)
Identify the period which contains s, p, d block elements.
A)
2nd period done
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B)
3rd period done
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C)
4th period done
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D)
1st period done
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question_answer34)
Match the entries in Column-I with those in Column-II.
|
Column-I |
|
Column-II |
a. |
Dobereiner |
1. |
Electro negativity scale |
b. |
Mendeleev |
2. |
Long form of periodic table |
c. |
Neils Bohr |
3. |
Law of triads |
d. |
Linus Pauling |
4. |
Law of octaves |
e. |
Newland |
5. |
Periodic table |
A)
a-4, b-2, c-3, d-1, e-5 done
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B)
a-1, b-2, c-3, d-4, e-5 done
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C)
a-3, b-5, c-2, d-1, e-4 done
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D)
a-5, b-4, c-3, d-2, e-1 done
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question_answer35)
Which element contains half-filled 'd' orbital?
A)
Vanadium done
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B)
Zinc done
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C)
Chromium done
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D)
Titanium done
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question_answer36)
The three elements calcium, strontium and barium form a triad. What is the basis of this grouping?
(i) Elements are in the increasing order of their atomic weights. |
(ii) The atomic weight of the middle element is equal to the average of the atomic weight of extreme elements. |
(iii) Elements in a triad have similar chemical properties. |
A)
Only (i) and (ii) done
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B)
Only (ii) and (iii) done
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C)
Only (i) and (iii) done
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D)
(i), (ii) and (iii) done
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question_answer37)
Which element is named in the honour of Fermi?
A)
10th done
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B)
50th done
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C)
100th done
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D)
75th done
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question_answer38)
According to Newland's law of octaves, which element is the repetition of the first element in the periodic table?
A)
Oxygen done
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B)
Nitrogen done
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C)
Chlorine done
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D)
Sulphur done
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question_answer39)
An element having atomic number 34 can be placed in which of the given group and period of the modern periodic table?
A)
Group 15 and 4th period done
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B)
Group 16 and 5th period done
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C)
Group 14 and 7th period done
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D)
Group 16 and 4th period done
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question_answer40)
The elements with atomic numbers 4, 12, 20, 38, 56, 88 belong to which of the given group?
A)
Alkali metals done
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B)
Alkaline earth metals done
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C)
Inert gases done
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D)
Halogens done
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