CHM101 e-exam (2019)

Admin_Louis — Mon, 11 Nov 2019 16:50:49 +0000

Question FBQ1 : ___ is a group 2 metal that is not counted as an alkaline earth metal since its oxide is not alkaline
Answer: Beryllium
Question FBQ2 : Group 2A elements are called alkaline earth metals because they react with oxygen to form _______
Answer: Oxides
Question FBQ3 : Alkaline earth metals have ______ valence electrons
Answer: Two
Question FBQ4 : Alkaline earth metals from ions with a ______ charge
Answer: +2
Question FBQ5 : The polarizing power of a cation is ________ proportional to its size
Answer: inversely
Question FBQ6 : Group 1 metals are known as ______
Answer: alkaline metals
Question FBQ7 : Group 2 elements are also known as _______ earth metals
Answer: alkaline
Question FBQ8 : John Newlands, an English chemist reported his law of _________
Answer: Octaves
Question FBQ9 : If elements are arranged sequentially in order of increasing __________, a periodic repetition, that is, periodicity in properties is observed
Answer: Atomic weight
Question FBQ10 : The modern periodic law states that the properties of elements are ______ functions of their atomic numbers
Answer: periodic
Question FBQ11 : The systematic name for the element with atomic number of 105 is called ______
Answer: Unnilpentium
Question FBQ13 : According to _________, no two electrons in the same atom can have the same value of n, l and m_i.
Answer: Exclusion principle
Question FBQ14 : According to _____ rule, every orbital in a subshell is singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin
Answer: Hunds
Question FBQ15 : Elements in the same period have same number of _______
Answer: Shell
Question FBQ16 : Elements in the same group have the same number of ________
Answer: Valence electrons
Question FBQ17 : The electronic configuration of an atom with atomic number 9 is given as ______
Answer: 1s2 2s2 2p5
Question FBQ18 : The ionic radii of metallic cations are ____ than the atomic radii
Answer: Smaller
Question FBQ19 : The ionic radii of non-metallic anion are ____ than the atomic radii
Answer: Bigger
Question FBQ20 : Electron affinity _______ across the period
Answer: Increases
Question FBQ21 : Complete the following reaction Na₂C₂ + 2H₂O â†’ 2NaOH + ___
Answer: C2H2
Question FBQ22 : When Li₂CO₃ is decomposed under heat it gives ____ and CO₂
Answer: Li2O
Question FBQ23 : KO₂ is an example of a ____ oxide
Answer: Super
Question FBQ24 : When a metal is surrounded by solvent molecules, the phenomenon is called ______
Answer: Solvation
Question FBQ25 : Electrons associated with the solvent are known as ______ electrons
Answer: Solvated
Question FBQ26 : ________ is an alkaline earth metals useful in the formation of bones and teeth
Answer: Magnesium
Question FBQ27 : Complete the following reaction; Ca(OH)₂ + CO₂ â†’ ____ + H₂O
Answer: CaCO3
Question FBQ28 : All group 2 elements except ___ form hydrides
Answer: Beryllium
Question FBQ29 : Complex formation is favoured by ____, highly charged cations with suitable empty orbitals of approximately the right energy with which the ligand orbitals can combine
Answer: Small
Question FBQ30 : In chlorophyll ____ is coordinated to four nitrogen atoms in the heterocyclic porphyrin ring system
Answer: Magnesium
Question FBQ31 : The hydrated ionic radii of alkali metal ions _____ down the group
Answer: Decreases
Question FBQ32 : The tendency to form complexes ______ with increasing atomic number in alkali earth metals
Answer: Decreases
Question FBQ33 : The density of alkali earth metals shrinks from beryllium to calcium, but ____ considerably thereafter up to radium
Answer: Increases
Question FBQ12 : The systematic name for the element with atomic number 102 is called ______
Answer: Unilbium
Question FBQ34 : ____ is a metallic cation that is isoelectronic to Al³⁺
Answer: Mg2+
Question FBQ35 : Potassium (₁₉K) has an effective Z value of ___
Answer: 2.20
Question MCQ1 : Alkaline earth metals form ions with a ______ charge
Answer: +2
Question MCQ2 : Which element is not an alkaline earth metals?
Answer: zirconium
Question MCQ3 : The classification of certain groups of three elements into TRIADS was done by?
Answer: Dobereiner
Question MCQ4 : Classification of elements according to increasing atomic weight on a line which spiraled around a cylinder from the bottom to top was done by ?
Answer: De chancourtois
Question MCQ5 : The Law of octaves was put forward by?
Answer: Newlands
Question MCQ6 : Arranging elements in increasing atomic weight leading to a periodicity in their properties was done by
Answer: Mendeleev
Question MCQ7 : Both elements of the 1st period contains valence electrons in
Answer: K shell
Question MCQ8 : In periodic table, helium is placed at
Answer: top right corner
Question MCQ9 : On the basis of electronic configuration group and period an element with atomic number of 5 is
Answer: 2 and IIIA
Question MCQ10 : Chemical properties depends upon
Answer: valence shell electronic configuration
Question MCQ11 : Nobel gases are present in
Answer: VIIIA group
Question MCQ12 : Energy required to remove an electron from the outermost shell is called
Answer: ionization energy
Question MCQ13 : As we go from top to bottom in a group shielding effect
Answer: Increases
Question MCQ14 : Group A elements are called
Answer: transition elements
Question MCQ15 : Period number of element indicates
Answer: value of valence shell
Question MCQ16 : Ability of atom to attract electrons towards itself is called
Answer: Electronegativity
Question MCQ17 : Average distance between nucleus and outer shell is called
Answer: atomic size
Question MCQ18 : Groups containing alkaline earth metals are
Answer: IIA
Question MCQ19 : Physical properties depends on the
Answer: size of atom
Question MCQ20 : Elements that lie in same column have
Answer: similar properties
Question MCQ21 : As we go from left to right across period, electron affinity
Answer: Increases
Question MCQ22 : Elements are arranged in order of
Answer: increasing atomic number
Question MCQ23 : Decrease in force of attraction between valence electrons and nucleus by innver electrons is called
Answer: shielding effect
Question MCQ24 : 14 elements after actinium is called
Answer: Actinides
Question MCQ25 : an element that has an atomic number of 15 with which of the following elements will it show similar chemical properties
Answer: N (7)
Question MCQ26 : The group number and period number respectively of an element with atomic number 8 is
Answer: 6, 2
Question MCQ27 : Identify the wrong sequence of elements in a group
Answer: Cu, Au, Ag
Question MCQ28 : An element with atomic number ______ will form a basic oxide
Answer: 11
Question MCQ29 : What principle/rule is violated in the configuration 1s² 2s³
Answer: Pauli’s exclusion principle
Question MCQ30 : What principle/ rule is violated in the configuration 1s² 2s² 2px² 2py¹
Answer: Hund’s rule
Question MCQ31 : What principle/ rule is violated in the electronic configuration 1s² 2px²
Answer: Aufbau’s principle
Question MCQ32 : What type of bonding is found in Ammonia molecule
Answer: Covalent
Question MCQ33 : The polarizing power of a cation is _________ proportional to its size
Answer: Inversely
Question MCQ34 : Na₃AlF₆ is known as
Answer: Cryolite
Question MCQ35 : When a metal is surrounded by solvent molecules, the phenomenon is called
Answer: Solvation

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CHM101 e-exam (2019)