Which of the following is not a permissible arrangement of electrons in an atom?
- A
- B
- C
- D
Solution & Step-by-step Explanation
Quantum number constraints: In option B: , but . This is impossible since must be between and .
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Which of the following statements are true?A. Unlike Ga that has a very high melting point, Cs has a very low melting point.B. On Pauling scale, the electronegativity values of N and Cl are not the same.C. Ar, K^+, Cl^-, Ca^2+ , and S^2- are all isoelectronic species.D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si > Al > Mg > Na.E. The atomic radius of Cs is greater than that of Li and Rb.Choose the correct answer from the options given below:
Match List I with List IIList I (Ion)A. Co^2+ B. Mg^2+ C. Pb^2+ D. Al^3+ List II (Group Number in Cation Analysis)I. Group-III. Group-IIIIII. Group-IVIV. Group-VIChoose the correct answer from the options given below:
Predict the major product 'P' in the following sequence of reactions:
Which of the following are paramagnetic?A. [NiCl_4]^2- B. Ni(CO)_4 C. [Ni(CN)_4]^2- D. [Ni(H_2O)_6]^2+ E. Ni(PPh_3)_4 Choose the correct answer from the options given below:
Given below are two statements:Statement I: Like nitrogen that can form ammonia, arsenic can form arsine.Statement II: Antimony cannot form antimony pentoxide.In the light of the above statements, choose the most appropriate answer from the options given below:
Consider the following compounds: _2 , H_2_2 and H_2_4 . The oxidation states of the underlined elements in them are, respectively:
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