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PSC Question and Answer about Chemistry-(Part-VIII) including for Kerala Administrative Service (KAS), Secretariat Assistant, Panchayath Secretary, BDO, Auditor, Assistant, LDC and LGS examination level questions. We will update balance portion of the study material.....

Question1:- Noble Gases belong to --- group


Question2:- The Elements which show little reactivity is termed as ------

Noble Gases

Question3:-Elements from Atomic Number 58 to 71 are known as


Question4:-Lathanides are also called

Rare Earths

Question5:-Elements from Atomic Number 90 to 103 are termed as


Question6:Man made Elements are called


Question7:-Another name of Transuranic Elements

Synthetic Elements

Question8:-The Periodic Table is divided into ----- Main Blocks


Question9:The Four Blocks of Periodic Table are

s block, p block, d block & f block

Question10:-s block includes Elements of -----

Group 1 and 2

Question11:-p block includes Elements of -----

Group 13 to 18

Question12:-d block includes Elements of -----

Group 3 to 12

Question13:-f block includes Elements of -----

Lanthanides and Actinides

Question14:-s and p block Elements are called

Representative Elements

Question15:-Lithium , Sodium and Pottassium are included in the ------ group

First group

Question16:-Magnesium, Radium and Calcium are included in ------group

Second group

Question17:- Boron , Aluminium and Gallium are included in ---- group

13 th group

Question18:-13th group of Elements are also known as

Boron Family

Question19:-Carbon, Silicon and Germanium are included in the -------group

14 th group

Question20:-14th group of Elements are also known as

Carbon Family

Question21:-Nitrogen, Phosphorous and Antimony are included in ----- group

15 th group

Question22:-15 th group of Elements are also known as

Nitrogen Family

Question23:-Oxygen, Sulpher and Polonium are included in ----- group of Elements

16 th group

Question24:- 16 th group of Elements are also known as

Oxygen Family

Question25:-Flurine , Chlorine and Iodine are included in the ---- group of Elements

17 th group

Question26:- 17 th group of Elements are also known as


Question27:-Helium , Neon and Argon are included in the ----- group of Elements

18 th group

Question28:-i8 th group of Elements are also known as

Inert Gases or Noble Gases

Question29:-d block Elements are called

Trasition Elements

Question30:-f block Elements ara called

Inner Transition Metals

Question31:-In a group, from top to bottom , Atomic Size ----


Question32:-In a period , Atomic sizes ----- from Left to Right


Question33:-The Energy required to remove an Electron completely from an Isolated Gaseous atom or ion of an Element is called

Ionization Energy

Question34:-In a period , Ionization Energy ----- from Left to Right


Question35:-In a group, Ionization Energy ----- from Top to Bottom


Question36:-The Energy Change when an Electron is gained by a neutral gaseous atom converting it into a negatively charged ion is called

Electron Affinity

Question37:-In a group, Electron Affinity ----- from Top to Bottom


Question38:-In a group, Electron Affinity ----- from Left to Right


Question39:-The power of an Atom to attract Electron Pairs is called

Electro Negativity

Question40:-The Electro Negativity Scale was introduced by

Linus Pauling

Question41:- The attractive force which holds the atoms together in a molecule is called

Chemical Bond

Question42:-The bond formed by the transfer of Electrons from One Element to another is termed as

Ionic Bond

Question43:-Ionic Bond is also known as

Electrovalent Bond

Question44:-Ionic Bond was proposed by


Question45:-The bond formed by the mutual sharing of Electrons between the Atoms is known as

Covalent Bond

Question46:-Covalent Bond was proposed by .

Gilbert N Lewis

Question47:- The two types of Covalent Bonds are

Polar and Non Polar Covalent Bonds

Question48:----- bond is made by two Atoms with different Electro Negativity

Polar Covalent Bond

Question49:- The bond made by the two Atoms of same Electro Negativity is known as

Non Polar Covent Bond

Question50:- The number of Electrons contributed by an Atom for sharing is known as


Question52:- Co-ordinate Bond is proposed by


Question53:-The attractive force between Mobile Electrons and the Metallic Kernels are called

Metallic Bonds

Question54:-The bond between molecules which are brought together is called

Van der Waals bonds

Question55:-The weekest bond is

Van der Waals bonds

Question56:-The electrostatic attractive force between covalently bonded Hydrogen Atom of one Molecule and an Electro Negative Atom of the same or neighbouring molecule is called

Hydrogen Bond

Question57:-The two types of Hydrogen Bonding are

Inter Molecular and Intra Molecular H bonding

Question58:------- is a process in which one or more substances are converted into new substances

Chemical Reaction

Question59:-The substance which get transformed or which undergo Chemical Reaction is called


Question60:-The new substance formed as a result of Chemical Reaction is called


Question61:-Chemical Reaction in which light energy is either absorbed or released is called

Photochemical Reaction

Question62:- Chemical Reaction in which electric energy is either absorbed or released is called

Electrochemical Reaction

Question63:- Rearrangement of atoms in a given substance take place and a new substance is formed in

Isomerisation Reaction

Question64:- A reaction in which heat energy is either absorbed or released is called

Thermochemical Reactions

Question65:-A reaction in which heat is evolved is called

Exothermic Reaction

Question66:-A reaction in which heat is absorbed is called

Endothermic Reaction

Question67:-The reactions in which there is an addition of oxygen or the removal of hydrogen


Question68:-The reaction in which there is a removal of oxygen or the addition of hydrogen


Question69:-The colour of Blue Copper Sulphate is due to the presence of ------ in it

Water Crystallisation

Question70:-The number of electrons lost, gained or shared as a result of Chemical Bonding is

Oxidation Number

Question71:-In oxidation, Oxidation Number -----


Question72:-In reduction, Oxidaion Number -----


Question73:-Oxidation Number of an Atom in free state is ----


Question74:-Oxidation Number of Alkali Metals in molecule is always is ----


Question75:-Oxidation Number of Alkaline Earth Metals in a molecule is always ------


Question76:-Sum of Oxidation Number of Atoms in a molecule is equal to ----


Question77:-A material which can not be broken down or changed into another substance using any chemical method is called

An Element

Question78:-The most common Element in atmosphere


Question79:------ is the second most abundant element in the Earth Crust


Question80:-The two Elements which are liquid at room temperature

Bromine & Mercury

Question81:-The Element having the maximum electronegativity is


Question82:-Most Electropositive Element is


Question83:-Most Electropositive stable element is


Question84:----- element is largely used in photoelectric cells


Question85:----- element has the lowest Ionisation Energy


Question86:-The tenth most abundant element in the Earth Crust is


Question87:-The most reactive form of Phosphorous

White Phosphorous

Question88:-Which is more stable (Red Phosphorous, White Phosphorous)

Red Phosphorous

Question89:---- is a strong poison

White Phosphorous

Question90:------- burns itself

White Phosphorous

Question91:------ preserves under water

White Phosphorous

Question92:----- is used in the manufacture of Match Boxes

Red Phosphorous

Question93:-Major Elements present in Sea-Water are

Chlorine , Sodium , Magnesium, Sulpher, Calcium, Potassium and Carbon

Question94:-The halogens extracted from the sea water is

Chlorine and Bromine

Question95:-------- is generally used as a Thermometric Fluid


Question96:- Which element is kept by covwering wax


Question97:-The Element with hte highest Melting Point is


Question98:-The metal with highest Melting Point


Question99:- The most reactive Element


Question100:- The radio active liquid element