Question: The ability of an element to participate in a chemical reaction is measured in form of its Answer:C: ionization energy Question: used the Law of the Octave to arrange atoms Answer:A: John Newlands Question: What property was used by Mendeleev to classify the elements Answer:D: chemical properties Question: The properties of elements are periodic functions of their atomic numbers is the Answer:B: Mordern periodic law Question: The positions of K and ArCo and Ni do not remain anomalous any longer since is used in arranging the elements Answer:C: atomic number Question: In the mordern form of Mendeleev peroidic table elements are arranged in horizontal rows Answer:B: 7 Question: An orbital can have at the most two electrons of opposite spin can be called the Answer:D: Exclusion principle Question: Halogens have electron affinity Answer:A: exothermic Question: Electron affinity can be affected by all but one of the following Answer:C: mass number Question: is the energy released or absorbed when an electron is added to the gaseous atom in its ground state Answer:D: electron affinity Question: Except for rubidium and caesium Answer:A: all common cations are smaller than all common anions Question: Increase in principal quantum numbern means of the atomic radii Answer:C: increase Question: The attractive force which binds a hydrogen atom of one molecule with an electronegative atom of another molecule of the same compound is called Answer:C: hydrogen bond Question: Which of these bonds has the weakest bond energy Answer:A: hydrogen bond Question: The most abundant metal in sea water is Answer:B: sodium Question: Which of these metals is radioactive Answer:B: francium Question: Which of these hydrides has the high boiling point Answer:C: water Question: Hydrides of alkali metals react with water to librate Answer:C: hydrogen Question: The charge on cations down a group Answer:A: remains constant Question: Which of these increases solubility of compounds Answer:B: a small cation and a large anion Question: All these are consequences of the sole valence electron in alkali metals except Answer:A: the metals are soft Question: Which of these statements is not true of metallic elements Answer:C: They form acidic oxides Question: All these are types of metal lattices except Answer:C: hexagonal Question: Hydrogen may be used for all but one of the following Answer:D: synthesis of zinc Question: Hydrogen may not be advantagous as a fuel because Answer:D: it is a secondary source of energy Question: Which of these is not a property of hydrogen Answer:B: it has a pungent smell Question: Hydrogen can be obtained economically as a bi product in the electrolysis of Answer:A: brine Question: All these can be used as raw materials for the production of oxygen except Answer:D: nitrogen Question: Which of the isotopes of hydrogen is radioactive Answer:C: Tritium Question: one of the following is not a d block element Answer:Aluminium Question: Which of these is not an s block element Answer:Zn Question: Which of the following is not true as we move down a group of s and p block elements in the periodic table Answer:Electronegativity also increases Question: The energy absorbed or released when an electron is added to a gaseous atom is known as Answer:Ionization energy Question: One of these elements behave partly as the alkaline metals as well as a halogen element Answer:Hydrogen Question: The energy required to remove two valency electrons of a metallic atom is called Answer:Second ionization energy Question: One half of the distance between the nuclei of two atoms bonded together by a single bond is known as Answer:Covalent radius Question: All common cations are smaller than all common anions except one of these Answer:Rubidium Question: Which of these elements has the electonic configuration of 1s22s22p63s23p63d104s1 Answer:Cu Question: The tendency of an atom to attract shared electron pair of bond towards itself is known as Answer:Electronegativity Question: One half of the distance between the nuclei of two like atoms bonded together by a single covalent bond is known as Answer:Covalent radius Question: assumes that there exist a set ofemptyhydrogen like orbitals into which electrons can be added Answer:Aufbau principle Question: The energy required to remove the least strongly bond electron from an isolated gaseous atom in its ground state is known as Answer:Ionisation energy Question: states that no twoelectrons inthe same atom can have the same value of all fourquantum numbers Answer:Pauli Exclusion principles Question: The most abundant metal in sea water is Answer:sodium Question: The value of screening constant S can be estimated with the help of Answer:Slaters rules Question: Q1 In the periodic table,period 6 contains ------ elements Answer: 32 Question: Q2 Which of these is not an isotope of hydrogen? Answer: Neutrium Question: Q3 __________ forms an oxide also known as heavy water. Answer: Deutrium Question: Q4 Which of the isotopes of hydrogen is radioactive? Answer: Tritium Question: Q5 All these can be used as raw materials for the production of oxygen except Answer: nitrogen Question: Q6 Hydrogen can be obtained economically as a bi-product in the electrolysis of ------ Answer: brine Question: Q7 Which if these is not a property of hydrogen? Answer: it has a pungent smell Question: Q8 Hydrogen may be used for all but one of the following. Answer: synthesis of zinc Question: Q9 Hydrogen may not be advantagous as a fuel because------- Answer: it is a secondary source of energy Question: Q10 Hydrogen may be used for all but one of the following Answer: synthesis of zinc Question: Q11 ______types of hydride compounds can be formed depending on the electronegativity of the elements Answer: 3 Question: Q12 When alkali metals are heated with hydrogen they form--------hydrides Answer: ionic Question: Q13 Silt is an example of ------ hydride Answer: covalent Question: Q14 Which of these statements is not true of metallic hydrides? Answer: they are volatile Question: Q15 Sodium Hydride is an example of ------- hydride Answer: ionic Question: Q16 All these are types of metal lattices except------- Answer: hexagonal Question: Q17 Which of these statements is not true of metallic elements? Answer: They form acidic oxides Question: Q18 All these are consequences of the sole valence electron in alkali metals except ------ Answer: the metals are soft Question: Q19 Which of these statements is not true? Answer: All metals react with carbon to form carbides Question: Q20 In the group of the alkali metals the degree of hydration-------- down the group. Answer: decreases Question: Q21 When a metal is sourrounded by solvent molecules not water, the phenomenon is called-------- Answer: Solvation Question: Q22 Which of these element does not belong to the alkali metals Answer: Radium Question: Q23 Decrease in hydration energy makes a compound ------ Answer: insoluble Question: Q24 Which of these increases solubility of compounds Answer: a small cation and a large anion Question: Q25 The charge on cations------ down a group Answer: remains constant Question: Q26 Hydrides of alkali metals react with water to librate------ Answer: hydrogen Question: Q27 Alkali metals react with sulphur to form ---- types of sulphides Answer: 2 Question: Q28 Ionization energy------ down the group within the alkali metals Answer: decreases Question: Q29 Within the alkali metals atomic size -------- Answer: increases down the group Question: Q30 Potassium compounds can be used for all but one of the following Answer: manufacture of glass Question: Q31 Alkali metals can be used for all but one of the following Answer: as rocket fuel Question: Q32 A consequence of ------- is the formation of a chelate ring Answer: intramolecular hydrogen bonding Question: Q33 Which of these hydrides has the high boiling point? Answer: water Question: Q34 Which of these metals is radioactive? Answer: francium Question: Q35 The most abundant metal in sea water is ------- Answer: sodium Question: Q36 Which of these bonds has the weakest bond energy? Answer: hydrogen bond Question: Q37 The attractive force which binds a hydrogen atom of one molecule with an electronegative atom of another molecule of the same compound is called--------- Answer: hydrogen bond Question: Q38 Increase in principal quantum number(n) means-----of the atomic radii Answer: increase Question: Q39 Except for rubidium and caesium, Answer: all common cations are smaller than all common anions Question: Q40 _____is defined as one-half of the distance between the nuclei of two adjacent metal atoms in the close packed crystal lattice Answer: metallic radius Question: Q41 _____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. Answer: Hund's rule Question: Q42 The alkali metals belong to the ------ elements Answer: s-block Question: Q43 Which is of these peroids of the peroidic table has only eight elements? Answer: 3 Question: Q44 Increase in principal quantum number(n) means-----of the atomic radii Answer: increase Question: Q45 In the equation for ionization,effective nuclear charge is represented as------ Answer: Z* Question: Q46 The ability of an element to participate in a chemical reaction is measured in form of its --------- Answer: ionization energy Question: Q47 ____is the energy released or absorbed when an electron is added to the gaseous atom in its ground state Answer: electron affinity Question: Q48 Electron affinity can be affected by all but one of the following Answer: mass number Question: Q49 Halogens have ------ electron affinity Answer: exothermic Question: Q50 An orbital can have at the most two electrons of opposite spin can be called the ------- Answer: Exclusion principle Question: Q51 In the mordern form of Mendeleev peroidic table, elements are arranged in --------horizontal rows. Answer: 7 Question: Q52 The positions of K and Ar,Co and Ni do not remain anomalous any longer since --------- is used in arranging the elements. Answer: atomic number Question: Q53 The properties of elements are periodic functions of their atomic numbers is the----------- Answer: Mordern periodic law Question: Q54 What property was used by Mendeleev to classify the elements? Answer: chemical properties Question: Q55 _________ used the Law of the Octave to arrange atoms Answer: John Newlands Question: Q56 __________ arranged elements in order of increasing atomic weight on a line which spiraled around a cylinder from bottom to top Answer: De Chanourtios Question: Q57 ________and____________ tried to classify elements into periods Answer: De Chancourtois and Dobereiner Question: Q58 _________is the tendency of an atom to attract towards itself the shared electron pair of a bond in which it is involved Answer: electronegativity Question: Q59 The second ionization energy of alkaline earth metals is less than that of corresponding alkali metals because-------- Answer: of stability of a closed shell configuration Question: Q60 ____________is the enthalpy change when one mole of crystal lattice is formed from the isolated gaseous ions Answer: lattice energy Question: Q61 A hybrid orbitals that has greater s-character is more likely to possess �?��?�. Answer: Greater electronegativity Question: Q62 Which of these is an sp-hybridized compound? Answer: C_{2}H_{2} Question: Q63 The presence of hydrogen bond in most molecules is responsible for the following except; Answer: Low boiling point Question: Q64 Which of these is not a covalent hydride? Answer: NaH Question: Q65 When alkali metals are heated with hydrogen they form--------hydrides Answer: Ionic Question: Q66 Hydrogen can be obtained economically as a bi-product in the electrolysis of ------ Answer: brine Question: Q67 One of these elements behave partly as the alkaline metals as well as a halogen element; Answer: Hydrogen Question: Q68 The tendency of an atom to attract shared electron pair of bond towards itself is known as Answer: Electronegativity Question: Q69 Which of the following is not true as we move down a group of s and p-block elements in the periodic table Answer: Electronegativity also increases Question: Q70 The energy required to remove two valency electrons of a metallic atom is called; Answer: Second ionization energy Question: Q71 Which of these elements has the electonic configuration of 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1} Answer: Cu Question: Q72 All common cations are smaller than all common anions except one of these; Answer: Rubidium Question: Q73 One half of the distance between the nuclei of two atoms bonded together by a single bond is known as Answer: Covalent radius Question: Q74 one of the following is not a d-block element? Answer: Aluminium Question: Q75 Which of these is not an s-block element Answer: Zn Question: Q76 The energy absorbed or released when an electron is added to a gaseous atom is known as Answer: Ionization energy Question: Q77 One half of the distance between the nuclei of two adjacent metal atoms in a close crystal lattice is called�?� Answer: Metallic radius Question: Q78 One of the following scientists never made any contribution to the development of periodic table? Answer: J.J Thompson Question: Q79 Which of these is not a property of metallic element? Answer: They form acidic oxide Question: Q80 Newlands law of octaves was rejected mainly because of; Answer: It could not hold good for elements heaver than calcium