Periodic Properties and Variations of Properties ICSE Class 10 Chemistry Board Exam Questions

Students of ICSE Class 10 should refer to Periodic Properties and Variations of Properties ICSE Class 10 Chemistry board year questions and solutions. below which have come in past board exams. You should always go through questions that have come in previous years. This will help you to understand the pattern of questions in ICSE Class 10 Chemistry and prepare accordingly. This will help you to get better marks in ICSE Class 10 Board Exams

ICSE Class 10 Chemistry Periodic Properties and Variations of Properties Board Exam Questions

Students should learn the important questions and answers given below for Chapter Periodic Properties and Variations of Properties in Chemistry for ICSE Class 10. These board questions are expected to come in the upcoming exams. Students of ICSE Class 10th should go through the below board exams questions and answers which will help them to get more marks in exams.

Board Exam Questions Periodic Properties and Variations of Properties ICSE Class 10 Chemistry

Fill in the blanks in the following statements, with suitable words :

Question: The modern Periodic Table has ……………………. periods.

Question: Each ……………………. in the Periodic Table is comprised of elements having the same number of electron shells.

Question: Elements in a period, all have the same number of …………….. in their atoms.

Question: Elements in a group, all have the same number of ………………. .

Question: The most active metals are located in …………… 1 and 2 of the Periodic Table.

Question: The most reactive non-metals comprise group …………….. of the Periodic Table.

Question: The elements of …………….. are known as typical elements.

Question: The elements occupying left and right side groups of Periodic Table are called …………… elements.

Question: The rare gases are placed in …………… group at the end.

Question: Elements from atomic number 57 to …………… occupy same place in Periodic Table. These elements are called ………………

Question: Actinides are the elements from atomic number ……………………… to ………….. and are radioactive.

Question: The actinides and …………… are kept outside the Periodic Table to mark their peculiar properties.

Question: The properties of elements are periodic function of their……………….

Question: The atomic size ……………………… as we move left to right across the period, because the ……………… increases but the ………………… remains the same.

Question: The metallic character ………….. in a group as one moves from top to bottom.

Question: The metallic character ………….. in a period as one moves from right to left.

Question: In a period or in a group, the larger the atomic size of an element, the…………………….metallic is the element.

Question: Moving across a ………………… of the periodic table, the elements show increasing ……………………… character.

Question: The amount of energy involved in the reaction X + energy → X+ + e– is known as the ………………of the element X.

Question: Across a period, the ionization potential………………

Question: Down the group, electron affinity……………

Question: The higher the electron affinity of a non-metal, ………………. chemically reactive the nonmetal is.

Question: The tendency to gain an electron …………….. on moving down a group and ………….. on moving across a period in the Periodic Table.

Question: Elements having high ionization potential have ……………… electron affinities.

Question: The electronegativity of elements …………. across a period and …………… down a group.

Question: In general, non-metals are ……………….. electronegative than metals.

Question: On moving from left to right in a given period, the number of shells …………………. .

Question: Element X belongs to group 2 and period 3 of the Periodic Table. It has ……………….. electrons in the outer most shell.

Question: Each period except period 1 in the Periodic Table begins with ……………. and ends up with a …………… .

Question: The metallic and non-metallic character depends upon the……………….and……………… of the elements.

Question: The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called………………

Multiple Choice Questions

Question. In the periodic table, alkali metals are placed in the group :
(a) 1
(b) 11
(c) 17
(d) 18

Question. An alkaline earth metal is :
(a) Palarium
(b) Calcium
(c) Lead
(d) Copper

Question. The number of electrons present in the valence shell of halogen is :
(a) 1
(b) 3
(c) 5
(d) 7

Question. If an element A belongs to period 3 and Group II then it will have :
(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

Question. On moving from left to right across a period of the periodic table, the atomic size :
(a) Decreases
(b) Increases
(c) Remains the same
(d) Sometimes increases and sometimes decreases

Question. On moving from left to right across a period of the periodic table, the non-metallic character of the elements :
(a) Decreases
(b) Increases
(c) Remains the same
(d) Depends on the period

Question. On moving from left to right across a period of the periodic table, the ionization potential :
(a) Goes up and down
(b) Decreases
(c) Increases
(d) Remains the same

Question. Ionisation potential increases over a period from left to right because the :
(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

Question. On moving from left to right across a period of the periodic table, the electron affinity of the elements in groups 1 to 7 :
(a) Goes up and then down
(b) Decreases and then increases
(c) Increases
(d) Decreases

Question. An element in period 3 whose electron affinity is zero :
(a) Neon
(b) Sulphur
(c) Sodium
(d) Argon

Question. Among the period 2 elements, the element which has high electron affinity is :
(a) Lithium
(b) Carbon
(c) Chlorine
(d) Fluorine

Question. On moving from left to right across a period of the periodic table, the electronegativity :
(a) Depends on the number of valence electrons
(b) Remains the same
(c) Decreases
(d) Increases

Question. Among the elements given below, the element with the least electronegativity is :
(a) Lithium
(b) Carbon
(c) Boron
(d) Fluorine

Question. Which of the following would weigh the least ?
(a) 2g atoms of nitrogen
(b) 1 mole of silver
(c) 22·4 litres of oxygen gas at 1 atmospheric pressure and 273 K
(d) 6·02 × 1023 atoms of carbon [Atomic masses : Ag = 108, N = 14, O = 16, C = 12]

Question. The ratio between the number of molecules in 2 g of hydrogen and 32 g of oxygen is :
(a) 1 : 2
(b) 1 : 0·01
(c) 1 : 1
(d) 0·01 : 1 [Given that H = 1, O = 16]

Question: An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is :
(a) 17
(b) 11
(c) 18
(d) 20

Give One Word/Chemical Term

Question. The law that groups elements in family of three.

Question. The law where every 8th element repeats properties.

Question. The law where repetition of properties varies periodically.

Question. Horizontal arrangement of elements.

Question. Vertical arrangement of elements.

Question. The elements present in the first period.

Question. The first three alkali metals.

Question. Elements with 1, 2 or 3 electrons in the last shell.

Question. Elements with 4, 5, 6 or 7 electrons in the last shell.

Question. Elements with 8 electrons in the last shell.

Question. Elements where the penultimate shell is being filled with electrons.

Question. A non-metal which has three electrons in the outermost shell.

Question. The largest atom in the third period.

Question. The smallest atom in the third period.

Question. The most metallic element in the third period.

Question. The most non-metallic element in the third period.

Question. The element which is the most electronegative in the third period.

Question. Most active non-metal.

Question. A metal which is a liquid at room temperature.

Question. A liquid non-metal.

Question. The transition element whose electronic configuration does not agree with the general pattern.

Question. The element with the least ionization potential in the third period.

Question. The amount of energy released when an atom in the gaseous state accepts an electron to form an anion.

Question. The element which has the highest electron affinity in the third period.

Question. The electrons present in the outermost shell of an atom.

Define/Explain the Following

1. Typical elements.               
The elements of the third period (Na, Mg, Al, Si, P, S, Cl, Ar) are called the typical elements. Each of these elements represent the general properties of all the elements of its group.

2. Transition elements.           
The elements which possesses partially filled d-orbital in its penultimate shell are called transition elements.

3. Actinides     
The 15 elements beginning with actinium and have atomic numbers 89 to 103 are called actinides.

4. Rare earths.    
The sixth period has 15 elements with atomic numbers 57 to 71 (La-Lu), beginning with lanthanum. These 15 elements are very much alike chemically and are known as rare earths or lanthanides.

5. Transuranium elements.   
The elements beyond uranium U, in the seventh period are called transuranium elements. These elements do not occur naturally. They all have been prepared artificially.

6. Bridge elements                 
The elements of second period are called bridge elements because they connect their own group elements with the elements of next group lying diagonally to them in the periodic
table e.g., Li (Lithium) and Mg (Magnesium).

7. Ionization potential            
It is the amount of energy required to remove an electron from the outer most (valence) shell of an isolated gaseous atom.

8. Electron affinity                 
It is the amount of energy released when an electron is added to the outer most (valence) shell of an isolated gaseous atom.

Reasoning Based Questions

Q. 1. Explain why the elements placed in the same group of the periodic table have the same chemical properties ? 

Q. 2. Why group IA elements are called alkali metals ?

Q. 3. Why sodium is a metal while sulphur is a non-metal ?

Q. 4. Alkali metals are good reducing agents.

Q. 5. Why are the elements sodium and chlorine in the same period of the periodic table ?

Q. 6. Sodium atom, Na forms the positive ion Na+, but chlorine atom Cl, does not form the positive Cl+ ion.

Q. 7. Potassium atom is larger than sodium atom. Why ?

Q. 8. Magnesium atom is smaller than calcium atom. Why ?

Q. 9. Magnesium atom is smaller than sodium atom. Why ?

Q. 10. Which is larger Na+ or K+ ? Why ?

Short Questions

Q. 1. State Newland’s law of octaves. Why did the law of octaves fail ? Write three important drawbacks of Newland’s classification.

Q. 2. Answer the following questions regarding Mendeleev’s modified periodic table.

Q. 3. What is modern periodic law ? Name the elements of ‘first transition series’.

Q. 4. Who gave modern periodic law ? What is meant by a group in the periodic table ?

Q. 5. How many vertical columns are there in the modern periodic table ? State whether the ionization potential increases or decreases on going down a group.

Q. 6. How many elements are in the second period of modern periodic table ? Write the names of first and last elements of second period.

Q. 7. How many elements are in the third period of modern periodic table ? Write the names of first and last elements of third period.

Q. 8. How many elements are in the fourth, fifth and sixth period of modern periodic table ?

Q. 9. Which period is the shortest one ? In which period maximum number of elements are present ?

Q. 10. Give the number of the group and the period, of the element having three shells with three electrons in valence shell.

Q. 11. What are the main characteristic of the last elements in the periodic table ? What is the general name given to such elements ?

Q. 12. What are typical elements ? Give the ‘liquid elements’ in periodic table.