Periodic Table
Q1. Choose the correct answer from the options given below:
(i) In the periodic table alkali metals are placed in the group:
[2011][1]
a. 1
b. 11
c. 17
d. 18
Show Answer
Ans. a. 1
(ii) Which of the following properties do not match with elements of the
halogen family? [2011][1]
a. They have seven
electrons in their valence shell.
b. They are highly reactive
chemically.
c. They are metallic in
nature.
d. They are diatomic in
their molecular form.
Show Answer
Ans. c. They are metallic in nature.
(iii) An element in period 3 whose electron affinity is zero. [1][2012]
a. Neon
b. Sulphur
c. Sodium
d. Argon
Show Answer
Ans. d. Argon
(iv) An alkaline earth metal. [2012][1]
a. Potassium
b. Calcium
c. Lead
d. Copper
Show Answer
Ans. b. Calcium
(v) Among the period 2 elements, the element which has high electron
affinity is: [2009] [2013] [1]
a. Lithium
b. Carbon
c. Chlorine
d. Fluorine
Show Answer
Ans. d. Fluorine
(vi) Ionization potential increases over a period from left to right
because the: [2014][1]
a. Atomic radius increases
and nuclear charge increases.
b. Atomic radius decreases
and nuclear charge decreases.
c. Atomic radius increases
and nuclear charge decreases.
d. Atomic radius decreases
and nuclear charge increases.
Show Answer
Ans. d. Atomic radius decreases and nuclear charge increases.
(vii) If an element A belongs to period 3 and Group II, then it will
have: [2014][1]
a. 3 shells and 2 valence
electrons
b. 2 shells and 3 valence
electrons
c. 3 shells and 3 valence
electrons
d. 2 shells and 2 valence
electrons
Show Answer
Ans. a. 3 shells and 2 valence electrons
(viii) Among the elements given below, the element with the least
electronegativity is: [2015][1]
a. Lithium
b. Carbon
c. Boron
d. Fluorine
Show Answer
Ans. a. Lithium
(ix) An element with the atomic number 19 will most likely combine
chemically with the element whose atomic number is: [2016][1]
a. 17
b. 11
c. 18
d. 20
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Ans. a. 17
(x) The most electronegative element from the following elements is:
[2019][1]
a. Magnesium
b. Chlorine
c. Aluminium
d. Sulphur
Show Answer
Ans. b. Chlorine
(xi) The element with the highest ionization potential is: [2020][1]
a. Hydrogen
b. Caesium
c. Radon
d. Helium
Show Answer
Ans. d. Helium
(xii) Electron affinity is maximum in: [Specimen 2023]
a. Alkaline earth metals
b. Halogens
c. Inert gases
d. Alkali metals
Show Answer
Ans. b. Halogens
(xiii) An alkali metal found in period 3 and group 1 is: [Specimen 2023]
a. Magnesium
b. Lithium
c. Sodium
d. Potassium
Show Answer
Ans. c. Sodium
Q2. Fill in the blanks from the choices given below:
(i) Across a period, the ionization potential ……………… (increases, decreases,
remains same). [2011][1]
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Ans. increases
(ii) Down the group, electron affinity ………………… (increases, decreases,
remains same). [2011][1]
Show Answer
Ans. decreases
(iii) The energy required to remove an electron from a neutral isolated
gaseous atom and convert it into a positively charged gaseous ion is called
…………………… (electron affinity, ionization potential, electronegativity).
[2017][1]
Show Answer
Ans. ionization potential
(iv) In period 3, the most metallic element is …………….
(Sodium/magnesium/aluminium). [2019][1]
Show Answer
Ans. Sodium
Q3. Name the following:
(i) A metal present in
period 3, group 1 of the periodic table. [2012][1]
Show Answer
Ans. Sodium
(ii) The element which has
the highest ionization potential. [2013][1]
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Ans. Helium
(iii) The amount of energy
released when an atom in the gaseous state accepts an electron to form an
anion. [2014][1]
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Ans. Electron affinity
(iv) The tendency of an atom
to attract electrons to itself when combined in a compound.
[2016][2019][2020][1]
Show Answer
Ans. Electronegativity
(v) The electrons present in
the outermost shell of an atom. [2016][1]
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Ans. Valence electrons
(vi) The energy released when
an electron is added to a neutral gaseous isolated atom to form a negatively
charged ion. [2018][1]
Show Answer
Ans. Electron affinity
(vii) An alkaline earth metal
present in group 2 and period 3. [2020][1]
Show Answer
Ans. Magnesium
(viii) The energy required to
remove an electron from the valence shell of a neutron isolated gaseous atom.
[Specimen 2023]
Show Answer
Ans. Ionization potential
Q4. Give reasons as to why:
(i) the oxidizing power of elements
increases on moving from left to right along a period in the periodic table.
[2011][1]
Show Answer
Ans. Because on moving from left to right along a period in the periodic table, the electron affinity of elements increases.
(ii) Ionization potential of
the element increases across a period. [2012][2018][1]
Show Answer
Ans. Because across a period, atomic size decreases and nuclear charge increases, so more energy is required to remove a valence electron.
(iii) Alkali metals are good
reducing agents. [2012][2018][1]
Show Answer
Ans. Because they have low ionization potential and thus lose electrons easily.
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Ans. Group-13, Period-3
|
Group |
IA 1 |
IIA 2 |
IIIA 13 |
IVA 14 |
VA 15 |
VIA 16 |
VIIA 17 |
0 18 |
|
2ndperiod |
Li |
|
D |
|
|
O |
J |
Ne |
|
|
A |
Mg |
E |
Si |
|
H |
M |
|
|
|
R |
T |
I |
|
Q |
u |
|
y |
* In this table H does not represent hydrogen.
*Some elements are given in their own symbol
and position in the periodic table.
*While others are shown with a letter.
With reference to the table answer the
following questions:
(i) Identify the most electronegative
element. [2013][1]
Show Answer
Ans. J (Fluorine)
(ii) Identify the most reactive
element of group 1. [2013][1]
Show Answer
Ans. R (Potassium)
(iii) Identify the element from period
3 with least atomic size. [2013][1]
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Ans. M (Chlorine)
(iv) How many valence electrons are present
in Q? [2013][1]
Show Answer
Ans. Five
(v) Which element from group 2 would
have the least ionization energy? [2013][1]
Show Answer
Ans. T (calcium)
(vi) Identify the noble gas of the
fourth period. [2013][1]
Show Answer
Ans. y-krypton
(vii) In the compound between A and H
what type of bond would be formed and give the molecular formula for the same.
[2013][2]
Show Answer
Ans. Ionic bond. Molecular formula: A2H
Q7. An element Z has atomic number 16.
Answer the following questions on Z:
(i) State the period and group to which Z belongs.
Show Answer
Ans. period-3, group-16
(ii) Is Z a metal or a non-metal?
Show Answer
Ans. Non-metal
(iii) State the formula between Z and hydrogen.
Show Answer
Ans. H2Z
(iv) What kind of a compound is this? [2014][5]
Show Answer
Ans. Covalent compound
Q8. The metals of Group 2 from top to bottom are Be, Mg, Ca, Sr and Ba. [2015][3]
1. Which one of these elements will form ions most readily and why?
Show Answer
Ans. Barium, because it has the lowest ionization potential among the given elements.
2. State the common feature in the electronic
configuration of all these elements.
Show Answer
Ans. All of them have 2 valence electrons.
Q9. Arrange the following as per the instructions given in the brackets:
(i) Cs, Na, Li, K, Rb
(increasing order of metallic character) [2015][1]
Show Answer
Ans. Li, Na, K, Rb, Cs
(ii) Mg, Cl, Na, S, Si
(decreasing order of atomic size) [2015][1]
Show Answer
Ans. Na, Mg, Si, S, Cl
(iii) Na, K, Cl, S, Si
(increasing order of ionization energy) [2015][1]
Show Answer
Ans. Cl, S, Si, Na, K
(iv) Cl, F, Br, I
(increasing order of electron affinity) [2015][1]
Show Answer
Ans. I, Br, F, Cl
(v) He, Ar, Ne
(Increasing order of the number of electron shells) [2017][1]
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(vi) Na, Li, K (Increasing
ionisation Energy) [2017][1]
Show Answer
Ans. K, Na, Li
(vii) F, Cl, Br (Increasing
electronegativity) [2017][1]
Show Answer
Ans. Br, Cl, F
(viii) Na, K, Li (Increasing
atomic size) [2017][1]
Show Answer
Ans. Li, Na, K
(ix) Li, K, Na, H (Decreasing order of ionization
potential) [2019][1]
Show Answer
Ans. H, Li, Na, K
(x) F, B, N, O (Increasing
order of electron affinity) [2019][1]
Show Answer
Ans. B, N, O, F
(xi) Na, K, Cl, Si, S. (increasing order of electronegativity) [Specimen 2023]
Show Answer
Ans. K, Na, Si, S, Cl
(xii) Be, Li, F, C, B, N, O (increasing order of metallic character) [Specimen 2023]
Show Answer
Ans. F, O, N, C, B, Be, Li
(xiii) Br, F, I, Cl (increasing order of atomic size) [Specimen 2023]
Show Answer
Ans. F, Cl, Br, I
Q10. Element X is a metal with a valency 2,
Y is a non-metal with a valency 3. [2015][2]
(i)
Write an equation
to show how Y forms an ion.
Show Answer
Ans. Y + 3e- ------> Y3-
(ii)
If Y is a
diatomic gas, write an equation for the direct combination of X and Y to form a
compound.
Show Answer
Ans. 3X + Y2 -------> X3Y2
Q11. Fill in the blanks with the choices
given in brackets.
(i)
Metals are good
……………… (oxidizing agents/reducing agents) because they are electron ………………
(acceptors/donors). [2016][1]
Show Answer
Ans. reducing, donors
(ii)
If an element has
a low ionization energy, then it is likely to be ………… (metallic/ non-metallic).
[2016][1]
Show Answer
Ans. metallic
(iii)
If an element has
seven electrons in its outermost shell, then it is likely to have the …………
(largest/smallest) atomic size among all the elements in the same period.
[2016][1]
Show Answer
Ans. smallest
Q12. Rewrite the following sentences by using the correct symbol >
(greater than) or < (less than) in the blanks given: [2016][2]
1.
The ionization potential of Potassium is ………… that of
Sodium.
Show Answer
Ans. < (less than)
2.
The electronegativity of Iodine is …………… that of
Chlorine.
Show Answer
Ans. < (less than)
Q13. Use the letters only written in the Periodic Table given below to answer
the questions that follow: [2016][4]
(i) State the number of
valence electrons in atom J.
Show Answer
Ans. 5
(ii) Which element shown
forms ions with a single negative charge?
Show Answer
Ans. M
(iii) Which metallic element
is more reactive than R?
Show Answer
Ans. T
(iv) Which element has its
electrons arranged in four shells?
Show Answer
Ans. T
Q14. Match
the atomic number 2, 4, 8, 15, and 19 with each of the following:
(i) A solid non-metal belonging to the third
period. [2017] [5]
Show Answer
Ans. 15
(ii) A metal of valency 1.
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Ans. 19
(iii) A gaseous element with valency 2.
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Ans. 8
(iv) An element belonging to Group 2.
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Ans. 4
(v) A rare gas.
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Ans. 2
Q15. In period 3 of the Periodic Table, element B is placed
to the left of element A.
On the basis of this information, choose the correct word from the brackets to
complete the following statements: [2018][3]
(i)
The element B would have (lower/higher) metallic character than A.
Show Answer
Ans. Higher
(ii)
The element A would probably have (lesser/higher) electron affinity than B.
Show Answer
Ans. Higher
(iii)
The element A would have (greater/smaller) atomic size than B.
Show Answer
Ans. Smaller
Q16. Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element.
(i) Which element forms electrovalent compound with G?
Show Answer
Ans. A
(ii) The ion of which element will
migrate towards the cathode during electrolysis?
Show Answer
Ans. B
(iii) Which non-metallic element has
the valency of 2?
Show Answer
Ans. E
(iv) Which is an inert gas? [2019]
[4]
Show Answer
Ans. F
Q17. The following table represent the
elements and the atomic number: [2020][3]
With reference to this, answer the
following using only the alphabets given in the table.
|
Element |
Atomic number |
|
P Q R |
13 7 10 |
(i)
Which element
combines with hydrogen to form a basic gas?
Show Answer
Ans. Q
(ii)
Which element has
an electron affinity zero?
Show Answer
Ans. R
(iii)
Name the element,
which forms an ionic compound with chlorine.
Show Answer
Ans. P
Q18. An element X has atomic number 17.
Answer the following questions. [Specimen 2023][3]
a. State the period and group to which it belongs.
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Ans. period- 3, group-17
b. Is it a metal or non-metal?
Show Answer
Ans. Non-metal
c. Write the formula between X and Hydrogen.
Show Answer
Ans. HX
Na, K, Cl, S, Si (increasing order of ionization energy) [2015][1]
ReplyDeleteShow Answer
Ans. Cl, S, Si, Na, K
Q 9 part -3
wrong answer-here ionization energy is decreasing