Category: CHM101 0 CHM101 1 / 50 The percentage of deuterium in natural occurring hydrogen is ________ Check 2 / 50 _________ metals react with sulphur to form simple sulphides and polysulphides. Check 3 / 50 Elements which achieve a stable noble gas configuration by accepting just one electron are collectively called _______ Check 4 / 50 Hydrides of alkali metals react with water to liberate which of these?______________ oxygen light ammonia hydrogen 5 / 50 Hydrogen is discharged at ___________ electrode during the electrolysis of brine Check 6 / 50 Which of these is not a covalent hydride? ______ Ammonia NaH Hydrochloric acid gas Ethyne 7 / 50 The presence of hydrogen bond in most molecules is responsible for the following EXCEPT ________ Low boiling point High solubility in water High melting point Very high boiling point 8 / 50 _____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. Aufbau's principle Hund's rule Paul Exclusion principles Guy's law 9 / 50 Which of these elements behave partly as the alkaline metals as well as a halogen element? _________ Helium Silicon Fluorine Hydrogen 10 / 50 _______ is a compound formed when hydrogen combines covalently with non-metals. Check 11 / 50 The stability of alkali salts depend on ______ Check 12 / 50 Why was Newlands law of octaves rejected? ____________ Elements were arranged in increasing order of atomic mass It could not hold good for elements heavier than calcium The cycle of repetition shown by elements is similar to octave in music Many radioactive elements had not been discovered then 13 / 50 The name given to group 2 elements in the periodic table is ________ Check 14 / 50 The tendency of an atom to attract towards itself shared electron pair of a bond is known as ________ bonding electron affinity atomic attraction electronegativity 15 / 50 Which of the following is not true as we move down a group of s and p-block elements in the periodic table? ________ Effective nuclear charge is relatively constant The value of principal quantum number increases Atomic radius increases steadly Electronegativity also increases 16 / 50 Atoms of an element which have the same atomic number but different mass number is known as _________ Check 17 / 50 Which of these alkali metals is the most electro-positive?______________ potassium calcium sodium lithium 18 / 50 Which of these periods of the periodic table has only eight elements? ________ 3 1 7 5 19 / 50 Lithium in the form of lithium stearate is used for the production of a substance known as __________ which minimizes friction between moving parts. Check 20 / 50 The elements which the extra electron enters(n2)f orbitals are called ________ Check 21 / 50 Which of these statements is not true of metallic elements?_________ they are malleable They form acidic oxides they have lustre they are ductile 22 / 50 How many elements are there in period 6 of the periodic table ? __________ 16 32 24 8 23 / 50 Ortho and para-hydrogen exemplifies a type of isomerism referred to as __________ isomerism. Check 24 / 50 Stability of alkali salts depends on which of the following?_______________ crystal lattice of the salt formed intensity of sun rays incident on it atomic size of the metal enthalpy of formation of the salt 25 / 50 A consequence of _______ is the formation of a chelate ring. Check 26 / 50 Within the alkali metals, atomic size _________ down the group. Check 27 / 50 Which of these statements is not true of metallic hydrides? _______ They are conductors of heat most have metallic appearance they are deficient in hydrogen they are volatile 28 / 50 Inner transition elements are otherwise known as ________ Check 29 / 50 Alkaline metals are extracted mainly by _________ Check 30 / 50 Magnesium hydride is an example of ________ hydride. Check 31 / 50 The attractive force which binds hydrogen atom of one molecule with an electronegative atom of another molecule is known as _________ Check 32 / 50 Which of the isotopes of hydrogen is radioactive?_________ Neutrium Protium Deutrium Tritium 33 / 50 __________ is one of the isotopes of hydrogen whose neutron number is zero. Check 34 / 50 How many electrons are in potassium atom? __________ 31 23 11 19 35 / 50 The phenomenon in which a metal is surrounded by solvent molecules is called ________ Check 36 / 50 The most abundant metal in sea water is called ______. sodium rubidium zinc lithium 37 / 50 Increase in principal quantum number(n) means _________ of the atomic radii Check 38 / 50 Which of these alkalis has the most stable fluoride?______________ sodium lithium rubidium potassium 39 / 50 Halogens have ________ electron affinity Check 40 / 50 $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{7}4s^{2}$ is the electronic configuration for an element with atomic number ___________ Check 41 / 50 The f-blocks elements are otherwise known as ________ Check 42 / 50 The alkali metals belong to the _______ elements f-block s-block p-block d-block 43 / 50 Fuel cell have advantage over power plants in that its efficiency is _________ Check 44 / 50 Which of these elements has the electronic configuration of $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}$? __________ Zn Ca Kr Cu 45 / 50 All these can be used as raw materials for the production of oxygen except ______ coke carbon(II)oxide steam nitrogen 46 / 50 Ionization energy ________ down the group within the alkali metals Check 47 / 50 Hydride ion is unusually _________ with respect to size Check 48 / 50 Which property was used by Mendeleev to classify elements?_______________ atomic number chemical properties atomic weight mass number 49 / 50 Berylium , an alkaline earth metal belongs to the _______ block elements. Check 50 / 50 An element that shows some properties similar to alkali metals and some others similar to those of halogens is most likely to be _________ Check Restart quiz Rate this quiz Send feedback
