CHM101 TMA question and answer 1-4, 40/40 guarantee score
TMA 1-4 Solutions - CHM101, Introductory Inorganic Chemistry
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1 Hydrides of alkali metals react with water to librate which of these?______________
Ø hydrogen
2 Which of these alkalis has the most stable floride?______________
Ø lithium
3 Why was Newlands law of octaves rejected?____________
Ø It could not hold good for elements heavier than calcium
4 Which of these statements is not true of metallic hydrides? ______________
Ø they are volatile
5 Which property was used by Mendeleev to classify elements?_______________
Ø chemical properties
6 Which of these alkali metals is the most electropositive?_____________________
Ø caesuim
7 The presence of hydrogen bond in most molecules is responsible for the following EXCEPT
Ø Low boiling point
8 The tendency of an atom to attract towards itself shared electron pair of a bond is known as
Ø electronegativity
9 Which of the isotopes of hydrogen is radioactive?________________
Ø Tritium
10 All these can be used as raw materials for the production of oxygen except _________.
Ø nitrog en
11 Which of these is not a covalent hydride?___________________
Ø NaH
12 The most abundant metal in sea water is called ______.
Ø sodi um
13 Which of these statements is not true of metallic elements?__________________
Ø They form acidi c oxides
14 Which of the following is not true as we move down a group of s and pblock
elements in the periodic table? _______________
Ø Electronegativity also increases
15 Stability of alkali salts depends on which of the following?________________
Ø enthalpy of formation of the salt
16 How many electrons are in potassium atom?__________
Ø 19
17 How many elements are there in period 6 of the periodic table ? _________________
Ø 32
18 Which of these elements behave partly as the alkaline metals as well as a halogen element?
Ø Hydroge n
19 Which of these periods of the peroidic table has only eight elements? ____________
Ø 3
20 Which of these elements has the electronic configuration of
$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}$?
Ø Cu
TMA 2
1 Arrange the following metals in an increasing order of their boiling point LI,Cs,Rb,K
Ø Cs,K,Rb,Li
2 Arrange the following alkali metals in order of their atomic number,Na,K,Li,
Ø Li,Na,K
3 According to, electronegativity is equated to the force of attraction between an atom and the
electron seperated by a distance equal to the covalent radius of the atom.
Ø AlfredRochow
4 Which of these metals can their compounds be used in photography ?
Ø K
5 All these are types of metal lattices exceptbexagonal
Ø hexagonal
6 Which of these statements is not true of metallic elements?
Ø They form acidic oxides
7 __________is a requirement in the electrolysis of beryllium chloride
Ø Sodium Chloride
8 In the extraction of calcium from fused calcium chloride is used as the anode
Ø graphite
9 All these are uses of Beryllium except
Ø used for making aircraft
10 Calcuim oxide is a constituent of all but one of the following
Ø barium
11 On exposure to air alkaline earth metals lose their silvery luster becausethey
Ø a layer of oxide is forme d on their surface
12 All the alkaline earth metals form ionic compounds except
Ø beryllium
13 Calcium compounds give out a characteristic flame colouration
Ø brick red
14 The hydrogen energies of alkaline earth metal ions are much greater than those of alkali metals becausethey
Ø they are smaller with increased cationic charge
15 Which of these statements is not true of alkaline earth metals?
Ø They are less dense than alkali metals
16 The first ionization energy of alkaline earth metals is more than that of corresponding alkali metals because
Ø The alka line earth metals have higher nuclear charge and are smaller in size
17 ___________is extremely rare and it is a radioactive element
Ø raduim
18 ___________ is the second most abundant metallic element in sea water
Ø magnes uim
19 Which of these statements is not true of lithium?
Ø Lithium reacts spontaneously with water
20 The strong cohesive forces present in the lithium atom gives rise to all but one of the following
Ø softness
TMA 3
Q1 _____states that as far as possible in a given atom in the ground state, electrons in the same sub shell will occupy different orbitals and will have parallel spins.
Ø Hund's rule
2 The alkali metals belong to the elements
Ø sblock
3 Which is of these peroids of the peroidic table has only eight elements?
Ø 3
4 Increase in principal quantum number(n) means of the atomic radii
Ø increase
5 In the equation for ionization,effective nuclear charge is represented asI
Ø Z*
6 The ability of an element to participate in a chemical reaction is measured in form of its electron
Ø ionization energy
7 ____is the energy released or absorbed when an electron is added to the gaseous atom in its ground state
Ø electron affinity
8 Electron affinity can be affected by all but one of the following
Ø mass number
9 Halogens have electron affinity
Ø exothermic
10 An orbital can have at the most two electrons of opposite spin can be called the
Ø Exclusion p rinciple
11 In the mordern form of Mendeleev peroidic table, elements are arranged in horizontal rows.
Ø 7
12 The positions of K and Ar,Co and Ni do not remain anomalous any longer since is used in arranging the elements.
Ø atomic numbe r
13 The properties of elements are periodic functions of their atomic numbers is the Lecoq
Ø Mordern periodic law
14 What property was used by Mendeleev to classify the elements?
Ø chemical prop erties
15 _________ used the Law of the Octave to arrange atoms
Ø John Newlands
16 __________ arranged elements in order of increasing atomic weight on a line which spiraled around a cylinder from bottom to top
Ø De Cha nourtios
17 ________and____________ tried to classify elements into periods
Ø De Chancourtois and Dobereiner
18 _________is the tendency of an atom to attract towards itself the shared electron pair of a bond in which it is involved
Ø electronegativity
19 The second ionization energy of alkaline earth metals is less than that of corresponding alkali metals becausethe
Ø of stability of a closed shell configuratio n
20 ____________is the enthalpy change when one mole of crystal lattice is formed from the isolated gaseous ions
Ø lattice energy
TMA 4
1 In the periodic table,period 6 contains elements
Ø 32
2 Which of these is not an isotope of hydrogen?
Ø Neutrium
3 __________ forms an oxide also known as heavy water.
Ø Deutrium
4 Which of the isotopes of hydrogen is radioactive?
Ø Tritium
5 All these can be used as raw materials for the production of oxygen except
Ø nitrogen
6 Hydrogen can be obtained economically as a byproduct in the electrolysis of
Ø brine
7 Which if these is not a property of hydrogen?
Ø it has a pungent smell
8 Hydrogen may be used for all but one of the following.
Ø synthesis of zinc
9 Hydrogen may not be advantagous as a fuel becauseIt
Ø it is a secondary source of energy
10 Hydrogen may be used for all but one of the following
Ø synthesis of zinc
11 ______types of hydride compounds can be formed depending on the electronegativity of the elements
Ø 3
12 When alkali metals are heated with hydrogen they formhydrides covalent
Ø ionic
13 Silt is an example of hydride
Ø covalent
14 Which of these statements is not true metallic hydrides?
Ø they are volatile
15 Sodium Hydride is an example of hydride
Ø ionic
16 All these are types of metal lattices exceptbodycentred
Ø hexagonal
17 Which of these statements is not true of metallic elements?
Ø They form acidi c oxides
18 All these are consequences of the sole valence electron in alkali metals except the
Ø metals are soft
19 Which of these statements is not true?
Ø All metals react with carbon to form carbid es
20 In the group of the alkali metals the degree of hydrationdown the group.
Ø decreases
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