MCQOPTIONS
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MCQOPTIONS
This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following pairs of species has same electronic configuration [UPSEAT 2002] |
| A. | \[Z{{n}^{2+}}\] and \[N{{i}^{2+}}\] |
| B. | \[C{{o}^{+3}}\] and \[N{{i}^{4+}}\] |
| C. | \[C{{o}^{2+}}\] and \[N{{i}^{2+}}\] |
| D. | \[T{{i}^{4+}}\] and \[{{V}^{3+}}\] |
| Answer» C. \[C{{o}^{2+}}\] and \[N{{i}^{2+}}\] | |
| 2. |
Which one is the strongest bond[Pb. PMT 2001] |
| A. | \[BrF\] |
| B. | \[FF\] |
| C. | \[ClF\] |
| D. | \[BrCl\] |
| Answer» B. \[FF\] | |
| 3. |
Electrovalent compound's [MP PMT 1984] |
| A. | Melting points are low |
| B. | Boiling points are low |
| C. | Conduct current in fused state |
| D. | Insoluble in polar solvent |
| Answer» D. Insoluble in polar solvent | |
| 4. |
The force which holds atoms together in an electrovalent bond is |
| A. | Vander Waal's force |
| B. | Dipole attraction force |
| C. | Electrostatic force of attraction |
| D. | All the above |
| Answer» D. All the above | |
| 5. |
Among the bonds formed by a chlorine atom with atoms of hydrogen, chlorine, sodium and carbon, the strongest bond is formed between [EAMCET 1988; MP PMT 1993] |
| A. | \[H-Cl\] |
| B. | \[Cl-Cl\] |
| C. | \[Na-Cl\] |
| D. | \[C-Cl\] |
| Answer» D. \[C-Cl\] | |
| 6. |
Which of the following compound has electrovalent linkage [CPMT 1983, 84, 93] |
| A. | \[C{{H}_{3}}Cl\] |
| B. | \[NaCl\] |
| C. | \[C{{H}_{4}}\] |
| D. | \[C{{l}_{2}}\] |
| Answer» C. \[C{{H}_{4}}\] | |
| 7. |
Favourable conditions for electrovalency are |
| A. | Low charge on ions, large cation, small anion |
| B. | High charge on ions, small cation, large anion |
| C. | High charge on ions, large cation, small anion |
| D. | Low charge on ions, small cation, large anion |
| Answer» B. High charge on ions, small cation, large anion | |
| 8. |
Phosphate of a metal M has the formula \[{{M}_{3}}{{\left( P{{O}_{4}} \right)}_{2}}.\] The formula for its sulphate would be [CPMT 1973; MP PMT 1996] |
| A. | \[MS{{O}_{4}}\] |
| B. | \[M{{\left( S{{O}_{4}} \right)}_{2}}\] |
| C. | \[{{M}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}\] |
| D. | \[{{M}_{3}}{{\left( S{{O}_{4}} \right)}_{2}}\] |
| Answer» B. \[M{{\left( S{{O}_{4}} \right)}_{2}}\] | |
| 9. |
In the formation of \[NaCl\] from \[Na\] and \[\gamma -\] [CPMT 1985] |
| A. | Sodium and chlorine both give electrons |
| B. | Sodium and chlorine both accept electrons |
| C. | Sodium loses electron and chlorine accepts electron |
| D. | Sodium accepts electron and chlorine loses electron |
| Answer» D. Sodium accepts electron and chlorine loses electron | |
| 10. |
From the following which group of elements easily forms cation |
| A. | \[F,\,\,Cl,\,\,Br\] |
| B. | \[Li,\,\,Na,\,\,K\] |
| C. | \[O,\,\,S,\,\,Se\] |
| D. | \[N,\,\,P,\,\,As\] |
| Answer» C. \[O,\,\,S,\,\,Se\] | |
| 11. |
Which of the following compounds possesses the dipole moment [NCERT 1978; EAMCET 1983; MP PMT 1995] |
| A. | Water |
| B. | Boron trifluoride |
| C. | Benzene |
| D. | Carbon tetrachloride |
| Answer» B. Boron trifluoride | |
| 12. |
Which of the following is non-polar [DCE 2002] |
| A. | \[PC{{l}_{5}}\] |
| B. | \[PC{{l}_{3}}\] |
| C. | \[S{{F}_{6}}\] |
| D. | \[I{{F}_{7}}\] |
| Answer» D. \[I{{F}_{7}}\] | |
| 13. |
In the following which one have zero dipole moment [DPMT 1985] |
| A. | \[B{{F}_{3}}\] |
| B. | \[CC{{l}_{4}}\] |
| C. | \[BeC{{l}_{2}}\] |
| D. | All of these |
| Answer» E. | |
| 14. |
Which of the following contains a coordinate covalent bond [UPSEAT 2001] |
| A. | \[{{N}_{2}}H_{5}^{+}\] |
| B. | \[BaC{{l}_{2}}\] |
| C. | HCl |
| D. | \[{{H}_{2}}O\] |
| Answer» B. \[BaC{{l}_{2}}\] | |
| 15. |
\[{{N}_{2}}\] and \[{{O}_{2}}\] are converted into monocations \[N_{2}^{+}\] and \[O_{2}^{+}\] respectively. Which is wrong [CBSE PMT 1997] |
| A. | In\[{{N}_{2}},\] the \[N-N\]bond weakens |
| B. | In \[{{O}_{2}},\] the \[O-O\] bond order increases |
| C. | In \[{{O}_{2}},\] paramagnetism decreases |
| D. | \[N_{2}^{+}\] becomes diamagnetic |
| Answer» E. | |
| 16. |
Which compound is highest covalent |
| A. | \[LiCl\] |
| B. | \[LiF\] |
| C. | \[LiBr\] |
| D. | LiI |
| Answer» E. | |
| 17. |
p and n-type of semiconductors are formed due to [UPSEAT 2002] |
| A. | Covalent bonds |
| B. | Metallic bonds |
| C. | Ionic bonds |
| D. | Co-ordinate bond |
| Answer» B. Metallic bonds | |
| 18. |
Which of the following compounds does not follow the octet rule for electron distribution [CET Pune 1998] |
| A. | \[PC{{l}_{5}}\] |
| B. | \[PC{{l}_{3}}\] |
| C. | \[{{H}_{2}}O\] |
| D. | \[P{{H}_{3}}\] |
| Answer» B. \[PC{{l}_{3}}\] | |
| 19. |
The electronic configuration of a metal \[M\] is \[1{{s}^{2}},\,\,2{{s}^{2}}\,2{{p}^{6}},\,\,3{{s}^{1}}.\]The formula of its oxides will be [MP PET/PMT 1998] |
| A. | \[MO\] |
| B. | \[{{M}_{2}}O\] |
| C. | \[{{M}_{2}}{{O}_{3}}\] |
| D. | \[M{{O}_{2}}\] |
| Answer» C. \[{{M}_{2}}{{O}_{3}}\] | |
| 20. |
The interatomic distances in \[{{H}_{2}}\] and \[C{{l}_{2}}\] molecules are 74 and 198 pm respectively. The bond length of \[HCl\] is [MP PET 1993] |
| A. | 272 pm |
| B. | 136 pm |
| C. | 124 pm |
| D. | 248 pm |
| Answer» C. 124 pm | |
| 21. |
Solid \[C{{H}_{4}}\] is[DPMT 1983] |
| A. | Molecular solid |
| B. | Ionic solid |
| C. | Pseudo solid |
| D. | Does not exist |
| Answer» B. Ionic solid | |
| 22. |
The valency of phosphorus in \[{{H}_{3}}P{{O}_{4}}\]is[DPMT 1984] |
| A. | 2 |
| B. | 5 |
| C. | 4 |
| D. | 1 |
| Answer» C. 4 | |
| 23. |
If the atomic number of element \[X\] is 7, the best electron dot symbol for the element is [NCERT 1973; CPMT 2003] |
| A. | \[X\,\,.\] |
| B. | \[.\,\,X\,\,.\] |
| C. | \[.\,\,\underset{.}{\overset{.}{\mathop{X}}}\,\,\,:\] |
| D. | \[:\,\,\underset{.\,.}{\overset{.\,.}{\mathop{X}}}\,\,\,.\] |
| Answer» D. \[:\,\,\underset{.\,.}{\overset{.\,.}{\mathop{X}}}\,\,\,.\] | |
| 24. |
Silicon has 4 electrons in the outermost orbit. In forming the bonds[EAMCET 1981] |
| A. | It gains electrons |
| B. | It loses electrons |
| C. | It shares electrons |
| D. | None of these |
| Answer» D. None of these | |
| 25. |
For the formation of covalent bond, the difference in the value of electronegativities should be [EAMCET 1982] |
| A. | Equal to or less than 1.7 |
| B. | More than 1.7 |
| C. | 1.7 or more |
| D. | None of these |
| Answer» B. More than 1.7 | |
| 26. |
The number of dative bonds in sulphuric acid molecules is [MP PET 2002] |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 4 |
| Answer» D. 4 | |