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.
| 101. |
Which is the correct order of ionic sizes (At. No. : Ce = 58, Sn = 50, Yb = 70 and Lu = 71) [AIEEE 2002] |
| A. | \[Ce>Sn>Yb>Lu\] |
| B. | \[Sn>Ce>Lu>Yb\] |
| C. | \[Lu>Yb>Sn>Ce\] |
| D. | \[Sn>Yb>Ce>Lu\] |
| Answer» C. \[Lu>Yb>Sn>Ce\] | |
| 102. |
The elements which occupy the peaks of ionisation energy curve, are [CBSE 2000] |
| A. | \[Na,\,\,K,\,\,Rb,\,Cs\] |
| B. | \[Na,\,\,Mg,\,\,Cl,\,\,I\] |
| C. | \[Cl,\,\,Br,\,\,I,\,F\] |
| D. | \[He,\,\,Ne,\,\,Ar,\,\,Kr\] |
| Answer» E. | |
| 103. |
Which of the following elements does not lose an electron easily? |
| A. | Na |
| B. | F |
| C. | Mg |
| D. | Al |
| Answer» C. Mg | |
| 104. |
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- |
| A. | s-block |
| B. | p-block |
| C. | d-block |
| D. | f-block |
| Answer» B. p-block | |
| 105. |
Which one of the following elements exhibit maximum number of valence electrons? |
| A. | Na |
| B. | Al |
| C. | Si |
| D. | P |
| Answer» E. | |
| 106. |
The long form of periodic table consists of |
| A. | seven periods and eight groups |
| B. | seven periods and eighteen groups |
| C. | eight periods and eighteen groups |
| D. | eighteen periods and eight groups |
| Answer» C. eight periods and eighteen groups | |
| 107. |
Mendeleev classified elements in |
| A. | increasing order of atomic groups |
| B. | eight periods and eight groups |
| C. | seven periods and eight groups |
| D. | eight periods and seven groups |
| Answer» D. eight periods and seven groups | |
| 108. |
Newlands could classify elements only up to |
| A. | copper |
| B. | chlorine |
| C. | calcium |
| D. | chromium |
| Answer» D. chromium | |
| 109. |
Which of the following properties do not match elements of halogen family? |
| A. | They have seven electrons in their valence shell |
| B. | They are diatomic in their molecular form |
| C. | They are highly reactive chemically |
| D. | They are metallic in nature |
| Answer» E. | |
| 110. |
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong? |
| A. | Metal |
| B. | Metalloid |
| C. | Non-metal |
| D. | Left-hand side element |
| Answer» C. Non-metal | |
| 111. |
Element A belongs to Group VII in p-block and element B belongs to Group I in s-block of the periodic table. Out of the following assumptions, the correct one is : |
| A. | A and B are metals |
| B. | A and B are non-metals |
| C. | A is a metal and B is a non-metal |
| D. | A is a non-metal and B is a metal |
| Answer» E. | |
| 112. |
Which is not true about noble gases? |
| A. | They are non-metallic in nature |
| B. | They exist in atomic form |
| C. | They are radioactive in nature |
| D. | Xenon is the most reactive among them |
| Answer» D. Xenon is the most reactive among them | |
| 113. |
The lightest liquid metal is |
| A. | Hg |
| B. | Ga |
| C. | Cs |
| D. | Fr |
| Answer» D. Fr | |
| 114. |
The metal which is hard and has high m. p. and used in electric bulbs is |
| A. | Ni |
| B. | Pt |
| C. | Fe |
| D. | W |
| Answer» E. | |
| 115. |
Which of the following is largest [CBSE PMT 1996] |
| A. | \[C{{l}^{-}}\] |
| B. | \[{{S}^{2-}}\] |
| C. | \[N{{a}^{+}}\] |
| D. | \[{{F}^{-}}\] |
| Answer» C. \[N{{a}^{+}}\] | |
| 116. |
Which of the following has the smallest size [CBSE PMT 1996] |
| A. | \[N{{a}^{+}}\] |
| B. | \[M{{g}^{+2}}\] |
| C. | \[C{{l}^{-}}\] |
| D. | \[{{F}^{-}}\] |
| Answer» C. \[C{{l}^{-}}\] | |
| 117. |
The radii of \[F,\,{{F}^{-}},\,O\] and \[{{O}^{-2}}\] are in the order of [AIIMS 1999; CPMT 1999] |
| A. | \[{{O}^{2-}}>{{F}^{-}}>O>F\] |
| B. | \[{{O}^{2-}}>{{F}^{-}}>F>O\] |
| C. | \[{{F}^{-}}>{{O}^{2-}}>F>O\] |
| D. | \[{{O}^{2-}}>O>{{F}^{-}}>F\] |
| Answer» B. \[{{O}^{2-}}>{{F}^{-}}>F>O\] | |
| 118. |
Correct energy value order is [Orissa JEE 2004] |
| A. | \[ns\ np\ nd(n-1)f\] |
| B. | \[ns\ np(n-1)d\ (n-2)f\] |
| C. | \[ns\ np(n-1)d\ (n-1)f\] |
| D. | \[ns(n-1)d\ n(n-1)f\] |
| Answer» C. \[ns\ np(n-1)d\ (n-1)f\] | |
| 119. |
The correct sequence of increasing covalent character is represented by [CBSE PMT 2005] |
| A. | \[LiCl<NaCl<BeC{{l}_{2}}\] |
| B. | \[BeC{{l}_{2}}<NaCl<LiCl\] |
| C. | \[NaCl<LiCl<BeCl\] |
| D. | \[BeC{{l}_{2}}<LiCl<NaCl\] |
| Answer» D. \[BeC{{l}_{2}}<LiCl<NaCl\] | |
| 120. |
Ionic radii are [CBSE PMT 2003, 04] |
| A. | Directly proportional to effective nuclear charge |
| B. | Directly proportional to square of effective nuclear charge |
| C. | Inversely proportional to effective nuclear charge |
| D. | Inversely proportional to square of effective nuclear charge. |
| Answer» D. Inversely proportional to square of effective nuclear charge. | |
| 121. |
Which of the following alkali metal ions has lowest ionic mobility in aqueous solutions [DPMT 2004] |
| A. | \[R{{b}^{+}}\] |
| B. | \[C{{s}^{+}}\] |
| C. | \[L{{i}^{+}}\] |
| D. | \[N{{a}^{+}}\] |
| Answer» D. \[N{{a}^{+}}\] | |
| 122. |
The trivalent ion having largest size in lanthanide series is [Pb.PMT 2004] |
| A. | \[Ti\] |
| B. | Zr |
| C. | Hf |
| D. | La |
| Answer» E. | |
| 123. |
Which one of the following is expected to have largest size [UPSEAT 2004] |
| A. | \[{{F}^{-}}\] |
| B. | \[{{O}^{-2}}\] |
| C. | \[A{{l}^{+3}}\] |
| D. | \[{{N}^{-3}}\] |
| Answer» E. | |
| 124. |
In the isoelectronic species the ionic radii \[\left( \overset{\text{o}}{\mathop{\text{A}}}\, \right)\] of \[{{N}^{3-}}\], \[{{O}^{2-}}\] and \[{{F}^{-}}\] are respectively given by [Pb. CET 1989] |
| A. | 1.36, 1.40, 1.71 |
| B. | 1.36, 1.71, 1.40 |
| C. | 1.71, 1.40, 1.36 |
| D. | 1.71, 1.36, 1.40 |
| Answer» D. 1.71, 1.36, 1.40 | |
| 125. |
Arrange the following in increasing order of their atomic radius : \[Na,\,K,\,Mg,\,Rb\] [AFMC 1995, 97; CPMT 1999] |
| A. | Mg < K < Na < Rb |
| B. | Mg< Na < K < Rb |
| C. | Mg < Na < Rb < K |
| D. | Na < K < Rb < Mg |
| Answer» C. Mg < Na < Rb < K | |
| 126. |
Point out the wrong statement : In a given period of the periodic table the s - block element has, in general, a lower value of [MP PMT 1997] |
| A. | Ionisation energy |
| B. | Electronegativity |
| C. | Atomic radius |
| D. | Electron affinity |
| Answer» D. Electron affinity | |
| 127. |
In which of the following pairs the difference between the covalent radii of the two metals is maximum [MP PET 1994] |
| A. | K, Ca |
| B. | Mn , Fe |
| C. | Co , Ni |
| D. | Cr , Mn |
| Answer» B. Mn , Fe | |
| 128. |
Radius of the isoelectronic species [MP PET 1994] |
| A. | Increases with the increase of nuclear charge |
| B. | Decreases with the increase of nuclear charge |
| C. | Is the same for all |
| D. | First increases and then decreases |
| Answer» C. Is the same for all | |
| 129. |
Which of the following sets of elements have the strongest tendency to form anions [MP PET 1993] |
| A. | N, O, F |
| B. | P, S, Cl |
| C. | As, Se, Br |
| D. | Sb, Te, I |
| Answer» B. P, S, Cl | |
| 130. |
The decreasing order of size of isoelectronic series \[{{K}^{+}},\,C{{a}^{2+}},\,C{{l}^{-}}\] and \[{{S}^{2-}}\] is [Roorkee 1995] |
| A. | \[{{K}^{+}}>C{{a}^{2+}}>{{S}^{2-}}>C{{l}^{-}}\] |
| B. | \[{{K}^{+}}>C{{a}^{2+}}>C{{l}^{-}}>{{S}^{2-}}\] |
| C. | \[C{{a}^{2+}}>{{K}^{+}}>C{{l}^{-}}>{{S}^{2-}}\] |
| D. | \[{{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}\] |
| Answer» E. | |
| 131. |
The atomic radius of elements of which of the following series would be nearly the same [MP PET 1997] |
| A. | \[Na\]\[K\]\[Rb\]\[Cs\] |
| B. | \[Li\]\[Be\]\[B\]\[C\] |
| C. | \[Fe\]\[Co\]\[Ni\]\[Cu\] |
| D. | \[F\]\[Cl\]\[Br\]\[I\] |
| Answer» D. \[F\]\[Cl\]\[Br\]\[I\] | |
| 132. |
Which of the following statements is correct [MP PET 1997] |
| A. | \[{{X}^{-}}\] ion is larger in size than X atom |
| B. | \[{{X}^{+}}\] ion is larger in size than X atom |
| C. | \[{{X}^{+}}\] ion is larger in size than \[{{X}^{-}}\] ion |
| D. | \[{{X}^{+}}\] and \[{{X}^{-}}\] ions are equal in size |
| Answer» B. \[{{X}^{+}}\] ion is larger in size than X atom | |
| 133. |
Which of the following is the correct order of ionic radii [BHU 2002] |
| A. | \[F>Li>Na>K\] |
| B. | \[F>K>Na>Li\] |
| C. | \[Na>K>F>Li\] |
| D. | \[Li>Na>K>F\] |
| Answer» C. \[Na>K>F>Li\] | |
| 134. |
Which one of the following should be most stable [MP PET 2000] |
| A. | \[H_{2}^{+}\] |
| B. | \[{{H}^{+}}\] |
| C. | \[H\] |
| D. | \[{{H}^{-}}\] |
| Answer» E. | |
| 135. |
The correct order of radii is [IIT-JEE (Screening) 2000] |
| A. | \[N<Be<B\] |
| B. | \[{{F}^{-}}<{{O}^{2-}}<{{N}^{3-}}\] |
| C. | \[Na<Li<K\] |
| D. | \[F{{e}^{3+}}<F{{e}^{2+}}<F{{e}^{4+}}\] |
| Answer» C. \[Na<Li<K\] | |
| 136. |
Of the following the ion with the smallest ionic radius is [MP PET 1996] |
| A. | \[{{K}^{+}}\] |
| B. | \[C{{a}^{2+}}\] |
| C. | \[T{{i}^{3+}}\] |
| D. | \[T{{i}^{4+}}\] |
| Answer» E. | |
| 137. |
The atomic radii in periodic table among elements from right to left [MP PET 1995] |
| A. | Decreases |
| B. | Increases |
| C. | Remain constant |
| D. | First decreases and then increases |
| Answer» C. Remain constant | |
| 138. |
The unit representing atomic radii and ionic radii is |
| A. | \[nm~~~~~~~~\] |
| B. | \[cm\] |
| C. | \[\overset{\text{o}}{\mathop{\text{A}}}\,\] |
| D. | \[m\] |
| Answer» E. | |
| 139. |
Which one of the following indicates the correct order of atomic size [EAMCET 1989] |
| A. | Be > F > C > Ne |
| B. | Be < C < F < Ne |
| C. | Be > C > F > Ne |
| D. | F < Ne < Be < C |
| Answer» D. F < Ne < Be < C | |
| 140. |
On moving down a group of regular elements, both atomic and ionic radii increases with increasing [BMEE 1995] |
| A. | Atomic number |
| B. | Atomic weight |
| C. | Atomic mass |
| D. | None of these |
| Answer» B. Atomic weight | |
| 141. |
The ionic radii of \[{{N}^{3-}}\], \[{{O}^{2-}}\], \[{{F}^{-}}\] and \[N{{a}^{+}}\] follow the order [MP PET/PMT 1998; MP PMT 2000] |
| A. | \[{{N}^{3-}}>{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}\] |
| B. | \[{{N}^{3-}}>N{{a}^{+}}>{{O}^{2-}}>{{F}^{-}}\] |
| C. | \[N{{a}^{+}}>{{O}^{2-}}>{{N}^{3-}}>{{F}^{-}}\] |
| D. | \[{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}>{{N}^{3-}}\] |
| Answer» B. \[{{N}^{3-}}>N{{a}^{+}}>{{O}^{2-}}>{{F}^{-}}\] | |
| 142. |
Which one is the correct order of the size of the iodine species [Pb. CET 1986; CBSE PMT 1997; Kurukshetra CEE 1998; RPMT 1999; DCE 1999; MP PET 2000; MP PMT 2001; BCECE 2005] |
| A. | \[I>{{I}^{+}}>{{I}^{-}}\] |
| B. | \[I>{{I}^{-}}>{{I}^{+}}\] |
| C. | \[{{I}^{+}}>{{I}^{-}}>I\] |
| D. | \[{{I}^{-}}>I>{{I}^{+}}\] |
| Answer» E. | |
| 143. |
Which one of the following is the smallest in size [IIT 1989] |
| A. | \[{{N}^{3-}}\] |
| B. | \[{{O}^{2-}}\] |
| C. | \[{{F}^{-}}\] |
| D. | \[N{{a}^{+}}\] |
| Answer» E. | |
| 144. |
On going down a main sub-group in the periodic table (example \[Li\] to \[Cs\] in IA or \[Be\] to \[Ra\] in IIA), the expected trend of changes in atomic radius is a [CPMT 1981; NCERT 1979] |
| A. | Continuous increase |
| B. | Continuous decrease |
| C. | Periodic one, an increase followed by a decrease |
| D. | A decrease followed by increase |
| Answer» B. Continuous decrease | |