InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which of the following pairs has both members from the same group of the periodic table ?A. Mg-KB. Mg-NaC. Na-BaD. Mg-Ca |
| Answer» Correct Answer - D | |
| 102. |
Using the perodic table, perdict the formulas of compounds which might be formed by the following pairs of elements : (a) silicon and bromine (b) aluminium and sulphur. |
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Answer» (a) Silicon is an element of the `14^(th)` group with a valence 4. Bromine belongs to the `17^(th)` group (halogen family) with valence 1. Hence, the formula of the compound formed would be `SiBr_(4)`. (b) Aluminium belongs to the `13^(th)` group with a valence 3. Sulphur belongs to the `16^(th)` group (chalcogen family) with valence 2. Hence, the formula of the compounds formed would be `Al_(2)S_(3)`. |
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| 103. |
IUPAC name of element of atomic number 114 isA. UnuntetradiumB. UnunquadiumC. UnnilquadiumD. Unniltetradium |
| Answer» Correct Answer - B | |
| 104. |
What would be the IUPAC name and symbol of Bohrium with atomic number 107 ? |
| Answer» Correct Answer - Unnilseptium, Uns | |
| 105. |
Name the German chemist who classified the elements using the physical properties such as melting point, boiling point, atomic volume, etc. |
| Answer» Correct Answer - Lothar Meyer. | |
| 106. |
What were the 12 horizontal rows known in the periodic table prepared by Mendeleev ? |
| Answer» Correct Answer - Series. | |
| 107. |
What happens to the oxidation state of the elements of the second moving from left to right with respect to their oxides ? |
| Answer» Oxidation state increases. | |
| 108. |
Arrangement of atoms according to their increasing ionization energy is clearly represented by the given option.A. `C lt N lt O lt F`B. `C lt O lt N lt F`C. `N lt C lt O lt F`D. `C lt O lt F lt N` |
| Answer» Correct Answer - B | |
| 109. |
What is the covalency of B in `[B(OH)_(4)]` and its oxidation state ? |
| Answer» Covalency is 4 and oxidation state is +3. | |
| 110. |
Electronegativity of the elements O,F,S and Cl increases in the orderA. S,Cl,O,FB. Cl,S,O,FC. S,Cl,F,OD. Cl,S,F,O |
| Answer» Correct Answer - A | |
| 111. |
Which orbital diagram gives an insight ionization energy ?A. B. C. D. |
| Answer» Correct Answer - C | |
| 112. |
An element M combines with a halogen Cl. What would be the formula of the compound obtained if M has a valence of 2 ? |
| Answer» Correct Answer - `MCl_(2)` | |
| 113. |
Valence electrons in the atom of element A is 4 and in the element B is 2. Most probable compound formed from A and B isA. `A_(2)B_(3)`B. `AB_(2)`C. `AB_(2)`D. `A_(2)B` |
| Answer» Correct Answer - C | |
| 114. |
Which of the following is/are correct order in accordance of electropositive nature of metal ?A. `Fe lt Mg lt Cu`B. `Na gt Mg gt Al`C. `Mg lt Ca lt Sr`D. `Fe gt Cu gt Zn` |
| Answer» Correct Answer - B::C::D | |
| 115. |
Statement-1: Long form of periodic table exactly explain the position of hydrogen. Statement-2 : Hydrogen is most abundent element of the universe.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-6B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-6C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - D | |
| 116. |
Which group of elements represents a collection of isoelectronic species ?A. `Al^(3+), Si^(4-), S^(2-)`B. `Ca^(2+), Sc^(3+), Cl^(+)`C. `N^(3-), F^(-), O^(-)`D. `Ca^(2+), Cl^(-), Sc^(3+)` |
| Answer» Correct Answer - D | |
| 117. |
Choose the pair in which `IE_(1)` of first element is greater than `IE_(1)` of second element but in case of `IE_(2)` order is/are reversedA. N, OB. P,SC. Be,BD. F,O |
| Answer» Correct Answer - A::B::C::D | |
| 118. |
An atom with high electronegativity generally has :-A. Low electron affinityB. Small atomic numberC. Large atomic radiusD. High ionisation potential |
| Answer» Correct Answer - D | |
| 119. |
Statement-1 : Nitrogen and oxygen have nearly same size. Statement-2 : Electron-electron repulsions tend to increase the size.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - B | |
| 120. |
What are representative elements?A. s-blockB. s-block and p-blockC. d-block or transition elementsD. d-block and f-block |
| Answer» Correct Answer - B | |
| 121. |
Which one of the following order is correct ?A. `I gt I^(+) gt I^(-)` (radii)B. `I^(-) gt I gt I^(+)` (radii)C. `I^(-) gt I gt I^(+)` (lonisation energy)D. `I^(+5) lt I^(+) lt I^(+7)` (lonisation energy) |
| Answer» Correct Answer - B | |
| 122. |
The element which has highest 2nd ionisation energy isA. NaB. MgC. CaD. Ar |
| Answer» Correct Answer - A | |
| 123. |
Statement-1 : Bond dissociation energy of `F_(2)` is more than `Cl_(2)`. Statement-2 : Due to smaller size of fluorine there are greater electron repulsions between the F atoms than Cl atoms.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-9B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-9C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - D | |
| 124. |
The screening effect of inner electrons of an atom can causeA. A decrease in the ionisation energyB. An increase in the jonisation energyC. No effect on the ionisation potentialD. An increase in the attraction of the nucleus on the outermost electrons |
| Answer» Correct Answer - A | |
| 125. |
The first ionisation potential of `Na,Mg,Al` and `Si` are in the orderA. `Na lt Mg gt Al lt Si`B. `Na lt Mg lt Al gt Si`C. `Na gt Mg gt Al gt Si`D. `Na gt Mg gt Al lt Si` |
| Answer» Correct Answer - A | |
| 126. |
What will be the correct order of size for the given elements ?A. `Na lt Cl lt F`B. `Na lt F lt Cl`C. `F lt Cl lt Na`D. `Cl lt F lt Na` |
| Answer» Correct Answer - C | |
| 127. |
Which of the following is not a representative element ?A. Z=37B. Z=31C. Z=54D. Z=24 |
| Answer» Correct Answer - D | |
| 128. |
Which of the following element has highest shielding constant ?A. MgB. AlC. KD. Ga |
| Answer» Correct Answer - D | |
| 129. |
The element which has highest `II^(nd)` I.E. ?A. LiB. BeC. KD. B |
| Answer» Correct Answer - A | |
| 130. |
The diagonal similarities are due to similar polarising powers for the elements The polarising power is defined asA. `("ionic charge")/("ionic radius")`B. `(("ionic charge")^(2))/("ionic radius")`C. `("ionic charge")/(("ionic radius")^(2))`D. `("ionic charge")/(("ionic radius")^(1//2))` |
| Answer» Correct Answer - C | |
| 131. |
Which of the following electronic structure represents a metallic element ?A. 2,8,7B. 2,8,8C. 2,8,4D. 2,8,1 |
| Answer» Correct Answer - D | |
| 132. |
Which among the following elements has the highest value for third ionisation energy ?A. MgB. AlC. NaD. Ar |
| Answer» Correct Answer - A | |
| 133. |
Statement-1 : `B_(2)O_(3)` is more acidic than BeO. Statement-2 : Ionisation energy of B is more than Be.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-8B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-8C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - C | |
| 134. |
Which of the following has maximum number of unpaired electrons ?A. `Mg^(2+)`B. `H^(3+)`C. `V^(3+)`D. `Fe^(2+)` |
| Answer» Correct Answer - D | |
| 135. |
In which element the electrons will be experiencing the highest effective nuclear charge ? The elements are Be, B, C, N & O.A. OB. BeC. `Be ~~ B`D. N= O |
| Answer» Correct Answer - A | |
| 136. |
What are transuranic elements ? |
| Answer» All elements after uranium | |
| 137. |
If the atomic number of an element is 33, it will be placed in the periodic table in theA. 1st groupB. 3rd groupC. 15th groupD. 17th group |
| Answer» Correct Answer - C | |
| 138. |
In the periodic table from left to right in a period, the atomic volumeA. IncreasesB. DecreasesC. Remains constatD. First increases and then decreases |
| Answer» Correct Answer - B | |
| 139. |
Statement-1 : Noble gases have high ionisation energy. Statement-2 : Noble gases belong to `18^(th)` group.A. Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-3B. Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-3C. Statement-1 is True, Statement-2 is FalseD. Statement-1 is False, Statement-2 is True |
| Answer» Correct Answer - B | |
| 140. |
Which of the following elements do not belong to the family indicated ?A. Cu- Coinage metalB. Ba- Alkaline earth metalC. Zn- Alkaline earth metalD. Xe- Noble gas |
| Answer» Correct Answer - C | |
| 141. |
The elements `Z = 117` and `120` have not yet have been discovered, In which family`//`group would you place these elements and also give the electronic configuration in each case. |
| Answer» The electronic configuration of Z=117 would be [Rn] `5f^(14)6d^(10)7s^(2)7p^(5)`. The element belongs to `17^(th)` group i.e., of halogen. Whereas the element with Z=120, the electronic configuration would be [Uuo]`8s^(2)` i.e., belongs to the `2^(nd)` group i.e., of alkaline earth metal. | |
| 142. |
The effective nuclear charge across the period (from left to right)A. IncreasesB. DecreasesC. First increases and then decreasesD. First decreases and then increases |
| Answer» Correct Answer - A | |
| 143. |
Find the position of element with atomic number 35 in the periodic table |
| Answer» `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4p^(5)`. Element belongs to the `17^(th)` group and `4^(th)` period | |
| 144. |
An element with atomic number 20 will be placed in which period of the periodic tableA. 2B. 4C. 3D. 1 |
| Answer» Correct Answer - B | |
| 145. |
On moving across the period in the p-block what is expected to the oxidizing power of the elements ? |
| Answer» The oxidizing power of the elements will increase (except the noble gases) because the electron gain enthalpy increases which show a high tendency to gain electrons. | |
| 146. |
The element which belong with p-block is/areA. FeB. GaC. NaD. I |
| Answer» Correct Answer - B::D | |
| 147. |
With which block `""_(30)Zn` belongs ?A. sB. pC. dD. f |
| Answer» Correct Answer - C | |
| 148. |
Which of the following will have the most negative electron gain enthalpy and which the least negative? `P, S, Cl, F`. Explain your answer. |
| Answer» Electron gain enthalpy generally becomes more negative across a period as we move from left to right within a group, electron to the 2p-orbital leads to greater repulsion than adding an electron to the larger 3-p orbital. Hence, the most negative electron gain enthalpy is of chlorine and the least negative electron gain enthalpy is of phosphorus. | |
| 149. |
On moving from left to right across a period in the periodic table the metallic characterA. DecreasesB. IncreasesC. Remains constatD. First increases and then decreases |
| Answer» Correct Answer - A | |
| 150. |
Why s-block elements act as strong reducing agenis ? |
| Answer» They have low ionization enthalpy and greater tendency to donate electrons. | |