MCQOPTIONS
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MCQOPTIONS
This section includes 144 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
In the periodic table, the element with atomic number 16 will be placed in the group [MP PET/PMT 1998] |
| A. | Third |
| B. | Fourth |
| C. | Fifth |
| D. | Sixth |
| Answer» E. | |
| 52. |
In which of the following groups all the three members are of the alkaline earth metals family |
| A. | \[Al,\,Sr,\,Ti\] |
| B. | \[Li,\,Na,\,K\] |
| C. | \[Mg,\,Ba,\,Ca\] |
| D. | \[Rb,\,Cs,\,Fr\] |
| Answer» D. \[Rb,\,Cs,\,Fr\] | |
| 53. |
Element of atomic number 23 is placed in the periodic table in [MP PMT 1996] |
| A. | s - block |
| B. | p - block |
| C. | d - block |
| D. | f - block |
| Answer» D. f - block | |
| 54. |
Whose name is not associated with the development of Periodic Table [DCE 1999] |
| A. | Prout?s |
| B. | Newlands |
| C. | Rutherford |
| D. | Loother Meyer |
| Answer» D. Loother Meyer | |
| 55. |
Cause of diagonal relationship is |
| A. | Similar electronic configuration of the elements |
| B. | Similar \[e/r\] ratio of the elements |
| C. | Same number of valency electrons in the elements |
| D. | Same atomic weights of the elements |
| Answer» C. Same number of valency electrons in the elements | |
| 56. |
In the main group elements (i) as we proceed down the same group in the periodic table and (ii) as we proceed from left to right in the same period, the atomic radius |
| A. | (i) Increase continuously; (ii) Decreases continuously |
| B. | (i) Decreases continuously; (ii) Increases continuously |
| C. | (i) Increases continuously; (ii) Decreases upto the group IV and then increases upto the end of the period. |
| D. | (i) Decreases continuously; (ii) Decreases upto the group IV and then increases upto the end of the period. |
| Answer» B. (i) Decreases continuously; (ii) Increases continuously | |
| 57. |
Hydrogen can be put in halogen group because [RPMT 2000] |
| A. | It has deuterium and tritium as isotopes |
| B. | It forms hydrides like chlorides |
| C. | It contains one electron only |
| D. | It is light |
| Answer» C. It contains one electron only | |
| 58. |
Elements in which \[4f\] orbitals are progressively filled are called as [MP PET 1996] |
| A. | Transition elements |
| B. | Lanthanides |
| C. | Actinides |
| D. | Inert gases |
| Answer» C. Actinides | |
| 59. |
The elements indicating following atomic numbers belong to same group [RPMT 1997] |
| A. | 11 and 37 |
| B. | 19 and 15 |
| C. | 39 and 88 |
| D. | None of these |
| Answer» B. 19 and 15 | |
| 60. |
The electronic configuration of the element which is just above the element with atomic number 43 in the same periodic group is [MNR 1992; UPSEAT 1999, 2000, 02] |
| A. | \[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{6}}\,3{{d}^{5}}\,4{{s}^{2}}\] |
| B. | \[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{6}}\,3{{d}^{10}}\,4{{s}^{2}}\,4{{p}^{5}}\] |
| C. | \[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{6}}\,3{{d}^{6}}\,4{{s}^{1}}\] |
| D. | \[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}3{{p}^{6}}\,3{{d}^{10}}\,4{{s}^{1}}\,4{{p}^{6}}\] |
| Answer» B. \[1{{s}^{2}}\,2{{s}^{2}}\,2{{p}^{6}}\,3{{s}^{2}}\,3{{p}^{6}}\,3{{d}^{10}}\,4{{s}^{2}}\,4{{p}^{5}}\] | |
| 61. |
\[Ce-58\] is a member of |
| A. | s-block elements |
| B. | p-block elements |
| C. | d-block elements |
| D. | f-block elements |
| Answer» E. | |
| 62. |
To which block is related an element having electronic configuration \[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}3{{d}^{10}}4{{s}^{1}}\] in the periodic table [MP PMT 1995] |
| A. | s - block |
| B. | p - block |
| C. | d - block |
| D. | f - block |
| Answer» D. f - block | |
| 63. |
The statement that is true for the long form of the periodic table is [IIT 1988] |
| A. | It reflects the sequence of filling the electrons in the order of sub-energy levels s, p, d and f |
| B. | It helps to predict the stable valency states of the elements |
| C. | It reflects trends in physical and chemical properties of the elements |
| D. | It helps to predict the relative ionicity of the bonds between any two elements |
| Answer» B. It helps to predict the stable valency states of the elements | |
| 64. |
Under normal condition which of the following electronic configuration is able to form dipositive ion [RPET 2000] |
| A. | \[[Ar]\,4{{s}^{1}}\] |
| B. | \[[Ne]\,2{{s}^{2}}3{{p}^{6}}\] |
| C. | \[[Ne]\,3{{s}^{2}}\] |
| D. | None of these |
| Answer» C. \[[Ne]\,3{{s}^{2}}\] | |
| 65. |
Which of the following is metalloid [BHU 1996; AMU 2000] |
| A. | \[Pb\] |
| B. | \[Zn\] |
| C. | \[As\] |
| D. | None of these |
| Answer» D. None of these | |
| 66. |
Which of the following is a normal element |
| A. | Ce |
| B. | He |
| C. | Li |
| D. | Ar |
| Answer» D. Ar | |
| 67. |
On the basis of following features identify correct optionA. Gaps were left for undiscovered elementsB. No correct position of hydrogenC. The isotopes of same element will be given different position |
| A. | Mendeleev's periodic table |
| B. | Modem periodic table |
| C. | Newland's arrangement of elements |
| D. | Both [a] and [b] |
| Answer» B. Modem periodic table | |
| 68. |
Which of the following is not isoelectronic with \[{{O}^{2-}}\]? |
| A. | \[{{N}^{3-}}\] |
| B. | \[N{{a}^{+}}\] |
| C. | \[{{F}^{-}}\] |
| D. | \[T{{i}^{+}}\] |
| Answer» E. | |
| 69. |
Which one of the following is most electropositive element? |
| A. | Sodium |
| B. | Calcium |
| C. | Aluminium |
| D. | Silicon |
| Answer» B. Calcium | |
| 70. |
The rusting of iron nail [CDS] |
| A. | decreases its weight |
| B. | increases its weight |
| C. | does not affect weight but iron is oxidised |
| D. | does not affect weight but iron is reduced |
| Answer» C. does not affect weight but iron is oxidised | |
| 71. |
The octet rule is not valid for which one of the following molecules? [NDA] |
| A. | \[C{{O}_{2}}\] |
| B. | \[{{H}_{2}}S\] |
| C. | \[N{{H}_{3}}\] |
| D. | \[B{{F}_{3}}\] |
| Answer» E. | |
| 72. |
Consider the following statements with reference to the periodic table of chemical elements: [IAS Prelim] 1. Ionisation potential gradually decreases along a period 2. In a group of elements, electron affinity decreases as the atomic weight increases 3. In a given period, electronegativity decreases as the atomic number increases Which of these statement (s) is/are correct? |
| A. | 1 only |
| B. | 2 only |
| C. | 1 and 3 |
| D. | 2 and 3 |
| Answer» C. 1 and 3 | |
| 73. |
Which one of the following properties changes with valency? [CDS] |
| A. | Atomic weight |
| B. | Equivalent weight |
| C. | Molecular weight |
| D. | Density |
| Answer» C. Molecular weight | |
| 74. |
The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all - |
| A. | halogens |
| B. | noble gases |
| C. | noble metals |
| D. | light metals |
| Answer» C. noble metals | |
| 75. |
Which one of these group of elements is also called the halogen family? |
| A. | Group 16 |
| B. | Group 18 |
| C. | Group 10 |
| D. | Group 17 |
| Answer» E. | |
| 76. |
The polarising ability of which one of the following is highest [DCE 2003] |
| A. | Small highly +ve ion |
| B. | Large +ve ion |
| C. | Small highly -ve ion |
| D. | Large -ve ion |
| Answer» B. Large +ve ion | |
| 77. |
Which or these have no unit [AFMC 2004] |
| A. | Electronegativity |
| B. | Electron affinity |
| C. | Ionisation energy |
| D. | Excitation potential |
| Answer» B. Electron affinity | |
| 78. |
Which one of the following has the highest electronegativity [UPSEAT 2004] |
| A. | Br |
| B. | Cl |
| C. | P |
| D. | Si |
| Answer» C. P | |
| 79. |
The attraction that an atom exerts on a pair of electrons that are being shared between that atom and another atom to which it is bonded by a covalent bond is referred to as its [Manipal MEE 1995] |
| A. | Electron affinity |
| B. | Electronegativity |
| C. | Ionisation energy |
| D. | Valence |
| Answer» C. Ionisation energy | |
| 80. |
Which element has the lowest electronegativity [CPMT 1976] |
| A. | Li |
| B. | F |
| C. | Fe |
| D. | Cl |
| Answer» B. F | |
| 81. |
Which of the following have maximum electronegativity [CPMT 1982] |
| A. | Al |
| B. | S |
| C. | Si |
| D. | P |
| Answer» C. Si | |
| 82. |
The property of attracting electrons by the halogen atom in a molecule is called [CPMT 1996] |
| A. | Ionisation potential |
| B. | Electron affinity |
| C. | Electronegativity |
| D. | Electronic attraction |
| Answer» D. Electronic attraction | |
| 83. |
Which of the following is most electronegative [CPMT 1999] |
| A. | Carbon |
| B. | Silicon |
| C. | Lead |
| D. | Tin |
| Answer» B. Silicon | |
| 84. |
Of the following elements, which one has highest electro-negativity [CPMT 1988; CBSE PMT 1991; BHU 1996; Kurukshetra CET 2002; Pb. PMT 2004] |
| A. | I |
| B. | Br |
| C. | Cl |
| D. | F |
| Answer» E. | |
| 85. |
The electron affinity for the inert gases is [Kurukshetra CEE 1998; MP PMT 2002] |
| A. | Zero |
| B. | High |
| C. | Negative |
| D. | Positive |
| Answer» B. High | |
| 86. |
Which one has maximum electron affinity [Roorkee 1995] |
| A. | N |
| B. | Be |
| C. | B |
| D. | Cl |
| Answer» E. | |
| 87. |
The correct order of electron affinity of B, C, N, O is [MP PET 1997; J & K 2005] |
| A. | \[O>C>N>B\] |
| B. | \[B>N>C>O\] |
| C. | \[O>C>B>N\] |
| D. | \[O>B>C>N\] |
| Answer» D. \[O>B>C>N\] | |
| 88. |
Which of the following pairs show reverse properties on moving along a period from left to right and from top to down in a group [DCE 2003] |
| A. | Nuclear charge and electron affinity |
| B. | Ionisation energy and electron affinity |
| C. | Atomic radius and electron affinity |
| D. | None of these |
| Answer» D. None of these | |
| 89. |
Which among the following factors is the most important in making fluorine the strongest oxidizing halogen [AIEEE 2004] |
| A. | Hydration enthalpy |
| B. | Ionization enthalpy |
| C. | Electron affinity |
| D. | Bond dissociation energy |
| Answer» E. | |
| 90. |
Which one of the elements has the maximum electron affinity [CPMT 1986; AFMC 1992, 95; Bihar MEE 1996; BHU 1997; CBSE PMT 1996, 99; MP PET 1995, 2001; AMU 2000] |
| A. | F |
| B. | Cl |
| C. | Br |
| D. | I |
| Answer» C. Br | |
| 91. |
The electron affinity of [CPMT 1994] |
| A. | Carbon is greater than oxygen |
| B. | Sulphur is less than oxygen |
| C. | Iodine is greater than bromine |
| D. | Bromine is less than chlorine |
| Answer» E. | |
| 92. |
In comparison with alkali metals, the electron affinity of halogens is |
| A. | Very high |
| B. | Very low |
| C. | Nearly same |
| D. | Exactly same |
| Answer» B. Very low | |
| 93. |
Ionic compounds are formed most easily with [DPMT 2005] |
| A. | Low electron affinity, high ionisation energy |
| B. | High electron affinity, low ionisation energy |
| C. | Low electron affinity, low ionisation energy |
| D. | High electron affinity, high ionisation energy |
| Answer» C. Low electron affinity, low ionisation energy | |
| 94. |
Which of the following has the least electron affinity in \[kJmo{{l}^{-1}}\] [AFMC 2000] |
| A. | Oxygen |
| B. | Carbon |
| C. | Nitrogen |
| D. | Boron |
| Answer» D. Boron | |
| 95. |
Which element has maximum electron affinity |
| A. | Na |
| B. | S |
| C. | Mg |
| D. | Al |
| Answer» C. Mg | |
| 96. |
The electron affinity values for the halogens show the following trend [Kerala PET 2002] |
| A. | \[F<Cl>Br>I\] |
| B. | \[F<Cl<Br<I\] |
| C. | \[F>Cl>Br>I\] |
| D. | \[F<Cl>Br<I\] |
| Answer» B. \[F<Cl<Br<I\] | |
| 97. |
Strongest acid is [RPMT 1997] |
| A. | \[A{{l}_{2}}{{O}_{3}}\] |
| B. | \[MgO\] |
| C. | \[N{{a}_{2}}O\] |
| D. | \[CaO\] |
| Answer» B. \[MgO\] | |
| 98. |
Which element has the greatest tendency to loose electrons [NCERT 1980] |
| A. | F |
| B. | S |
| C. | Fe |
| D. | Be |
| Answer» D. Be | |
| 99. |
In which of the following arrangements the order is NOT according to the property indicated against it [AIEEE 2005] |
| A. | \[A{{l}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}\] : Increasing ionic size |
| B. | \[B<C<N<O\] : Increasing first ionization enthalpy |
| C. | \[I<Br<F<Cl\] : Increasing electron gain enthalpy (with negative sign) |
| D. | \[Li<Na<K<Rb\] : Increasing metallic radius |
| Answer» C. \[I<Br<F<Cl\] : Increasing electron gain enthalpy (with negative sign) | |
| 100. |
A sudden large jump between the values of second and third ionisation energies of an element would be associated with the electronic configuration [CBSE PMT 1992; AFMC 1998; CPMT 1999] |
| A. | \[1{{s}^{2}},\,2{{s}^{2}}{{p}^{6}},\,3{{s}^{1}}\] |
| B. | \[1{{s}^{2}},\,2{{s}^{2}}{{p}^{6}},\,3{{s}^{2}}{{p}^{1}}\] |
| C. | \[1{{s}^{2}},\,2{{s}^{2}}{{p}^{6}},\,3{{s}^{2}}{{p}^{2}}\] |
| D. | \[1{{s}^{2}},\,2{{s}^{2}}{{p}^{6}},\,3{{s}^{2}}\] |
| Answer» E. | |