FBQ1: The two hydrogen nuclei would possibly spin in opposite directions to give ________________ Answer: *Para Hydrogen* FBQ2: Electronic configuration of Zn is ________________ Answer: *Is22s22d63s23p63d10 4s2* FBQ3: Period 2 contains elements from lithium to ________________ Answer: *Neon* FBQ4: How many elements are contained in period 4? Answer: *18* FBQ5: Period 6 contains 32 elements from ________________ to radon Answer: *Caesium* FBQ6: The d-block elements are also known as ________________ Answer: *Transition* FBQ7: Both the lanthanides and Actinides are collectively called ________________ Answer: *Inner-transition* FBQ8: The measure of the size of atom is known as ________________ Answer: *Atomic radii* FBQ9: The energy required to remove the least strongly bonded electron from its atom in ground state is known as ________________ Answer: *Ionization energy* FBQ10: The measure of the ability of an atom to accept an electron to form an anion is known as ________________ Answer: *Electron affinity* FBQ11: Atoms of an element with the same atomic number but different mass number is called ________________ Answer: *Isotopes* FBQ12: The mixture of CO and H2 is known as ________________ Answer: *Water gas* FBQ13: The breaking up of hydrocarbons at higher temperature in the presence of catalyst is called ________________ Answer: *Cracking* FBQ14: Reduction of carbon monoxide with hydrogen gives ________________ Answer: *Formaldehyde* FBQ15: Liquid hydrogen is used as ________________ Answer: *Rocket fuel* FBQ16: The largest use of hydrogen is in the manufacture of ________________ Answer: *Ammonia* FBQ17: Hydrogen combines with a number of elements to form ________________ Answer: *Hydrides* FBQ18: Alkali metals do not occur in free state in nature due to their ________________ Answer: *High reactivity* FBQ19: Potassium is obtained by the reduction of its chloride with ________________ Answer: *Sodium vapour* FBQ20: Lithium and potassium compounds are used in picture tubes of ________________ Answer: *Colour television* FBQ21: The factors which determine the density are atomic weight and ________________ Answer: *Volume* FBQ22: The least electronegative group in the periodic table is ________________ Answer: *Alkali metals* FBQ23: ________________ is the most abundant alkali metal in the earth Answer: *Sodium* FBQ24: Normal oxides and peroxides of alkali metals are both coloured and ________________ Answer: *Diamagnetic* FBQ25: coloured superoxides of alkali metals are generally ________________ Answer: *Paramagnetic* FBQ26: The phenomenon that occurs when a metal is surrounded by solvent molecules is called ________________ Answer: *Solvation* FBQ27: When a metal is surrounded by water molecule, the phenomenon is known as ________________ Answer: *Hydration* FBQ28: The degree of hydration ________________ on moving down the group Answer: *Decreases* FBQ29: Which block of the periodic table does group 1 and 2 belong to? Answer: *S* FBQ30: The radioactive element in group two is ________________ Answer: *Radium* FBQ31: ________________ is used for making atomic fuel containers Answer: *Beryllium* FBQ32: The ionization energy of alkaline earth metals ________________ on moving down the group Answer: *Decreases* FBQ33: All the alkaline earth metals burn in oxygen to form ________________ Answer: *Oxides* FBQ34: All the Group 2 elements except ________________ form hydrides by direct combination with hydrogen Answer: *Beryllium* FBQ35: Magnesium in chlorophyII is coordinated by how many nitrogen atoms in the heterocyclic porphyrin ring system? Answer: *4* Multiple Choice Question (MCQs): MCQ1: Metallic elements mostly form ___ oxides Answer: Neutral MCQ2: Non metallic elements form ___ oxides Answer: Neutral MCQ3: The main credit in developing the Periodic Laws goes to ___ Answer: Newlands MCQ4: According to the ____, no two electrons in the same atom can have the same value of n Answer: Exclusion Principle MCQ5: According to Pauli Exclusion Principle, an orbital can have at the most, two electrons of ___ spin Answer: Equal MCQ6: The seven F orbital can have __ number of electrons Answer: Ten MCQ7: What is the ground state electronic configuration of silicon? ( atomic number 14) Answer: 1s22s32p63s23p6 MCQ8: What is the electronic configuration of Fe2+ ? Answer: [Ar] 3d6 MCQ9: The members of the 4f series are called ____ Answer: Actinides MCQ10: The bonding within a non metal molecule is largely ___ Answer: Electrovalent MCQ11: The metallic radius depends to some extent on the crystal structure of the ____ Answer: Bond MCQ12: The ionization energies of the noble gases are the highest in the respective periods because Answer: Stability of electronic configuration MCQ13: Electron affinity of an atom is a measure of its ability to accept electron to form ___ Answer: Cation MCQ14: One of these factors does not affect electron affinity Answer: Atomic radius MCQ15: The ability of an atom to attract electrons depends upon the charge on the atom and the ___ of the atom Answer: Polarity MCQ16: Across a series of transition elements, the increase in electronegativity is much ___ Answer: Smaller MCQ17: Hydrogen is the principal element in the solar ___ Answer: System MCQ18: Hydrogen has three different isotopes having mass numbers Answer: 1,2,3 MCQ19: How many neutrons does ordinary hydrogen has Answer: Two MCQ20: Tritium differs from the other isotopes of hydrogen in being ____ Answer: Reactive MCQ21: Tritium decays by emission of __ particle Answer: Alpha MCQ22: Two nuclei of hydrogen spin in the same direction to give the form called ___- Answer: Para MCQ23: Hydrogen is manufactured by allowing steam to react with ___ at about 250K Answer: Coal MCQ24: Alkaline earth metals are less reactive than alkali metals as they are less ____ Answer: Electronegative MCQ25: Hydrogen reacts with oxygen at room temperature to form Answer: Water MCQ26: The process where electrical energy is generated by the reaction of hydrogen leaf in the fuel cell is ____ Answer: Cold combustion MCQ27: Hydrogen bond formed between two atoms of the same molecule is called ____ Answer: Intermolecular MCQ28: The length of hydrogen bond is much more than the ___ Answer: Electrovalent bond MCQ29: Group 1 elements are called alkali metals because they form __ which are strong alkali Answer: Oxides MCQ30: Lithium and sodium are extracted by ___ of their fused chlorides Answer: Oxidation MCQ31: Lithium in the form of lithium stearate is used for the production of ___ Answer: Lithium Lamp MCQ32: Potassium chlorate is used in making explosives and ____ Answer: Lubricating oil MCQ33: Alkali metals form ------- Answer: Divalent cations MCQ34: Lithium reacts with carbon to form ___ carbides Answer: Covalent MCQ35: All the alkali metal nitrates decompose on strong heating to nitrates liberating Answer: Carbon IV oxide