Tiêu đề 03. CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES.pdf ✅

PAPER 1 (1.) Official IUPAC name of atomic number 111 is : (1) Darmstadtium (2) Rontgenium (3) Coopernicium (4) Flerovium (2.) Using the periodic table, predict the formula of compound which might be formed by the following pairs of elements Aluminium and Sulphur : (1) Al S3 2 (2) Al S2 3 (3) AlS2 (4) Al S2 4 (3.) The total number of acidic oxides from the following list is : NO, N O,B O , N O ,CO,SO ,P O 2 2 3 2 5 3 4 10 (1) 3 (2) 4 (3) 5 (4) 6 (4.) Given below are two statements: one is labelled as Assertion(A) and the other is labelled as Reason (R) . Assertion(A): The ionic radii of 2 O − and Mg+2 are same. Reason(R): Both 2 O − and Mg+2 are isoelectronic species. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both (A) and (R) are correct but (R) is not the correctexaplanation of (A) (2) (A) is correct but (R) is not correct (3) (A) is not correct but (R) is correct (4) Both (A) and (R) are correct and (R) is the correct explanation of (A) (5.) Correct order of increasing ionic radii is : (1) Mg Na F O N + + − − − 2 2 3     (2) 3 2 2 N O F Na Mg − − − + +     (3) 2 2 3 F Na O Mg N − + − + −     (4) 2 2 3 Na F Mg O N + − + − −     (6.) Minimum no. of electrons in the penultimate shell of a transition metal will be : (1) One (2) Eight (3) Nine (4) Eighteen (7.) Correct statement in the given will be : A. In isoelectronic species no of shell will also be same. B. As negative charge on anion decrease radii decreases. C. If number of shell arround the nucleus is same then species must be isoelectronic. (1) A and B (2) B and C (3) C and A (4) A, B and C (8.) Arrange the following elements in the increasing order of metallic character : Si, Be, Mg, Na, P . (1) P Si Be Mg Na     (2) Si Na Mg Be P    
(3) Na Mg Be Si P     (4) P     Be Si Mg Na (9.) Which of the following elements is considered as a non metal : (1) Sc (2) Pb (3) Bi (4) Se (10.) Correct electronic configuration of all f-block element : (1) ( ) 1 14 0 1 2 n f nd ns 1 − − − (2) ( ) ( ) 1 14 0 1 2 n f n d ns 2 1 − − − − (3) ( ) 1 14 2 1 5 n f ns np 2 − − − (4) ( ) ( ) 1 14 1 10 2 n f n d ns 2 1 − − − − (11.) The correct order of electron gain enthalpy is : (1) Te Se S O    (2) S Se Te O    (3) O S Se Te    (4) S O Se Te    (12.) Given below are two statements : Statement I: Metallic character decreases and non metallic character increases on moving from left to right in a period. Statement II : Electronegativity generally increase across a period from left to right and decrease down a group in a periodic table. In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are incorrect (2) Statement I is correct but Statement II is incorrect (3) Statement I is incorrect but Statement II is correct (4) Both Statement I and Statement II are correct. (13.) The first ionization enthalpies of Be,B, N and O follow the order : (1) O N B Be    (2) Be B O N    (3) B Be N O    (4) B  B e  O  N (14.) Given below are two statements : Statement I: The ionization enthalpy is expressed in unit of 1 KJmol− and always positive. Statement II : When an electron is added to a neutral gaseous atom ( X ) to convert into a negative ion, the enthalpy change accompanying the process is defined as the electron gain enthalpy. In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are incorrect (2) Statement I is correct but Statement II is incorrect (3) Statement I is incorrect but Statement II is correct
(4) Both Statement I and Statement II are correct. (15.) The IUPAC nomenclature of an element with electronic configuration [Rn] 14 1 2 5 6 7 f d s is : (1) Unnilbium (2) Unnilunium (3) Unnilquadium (4) Unniltrium (16.) On going right to left in a period ionisation energy generally : (1) Increases (2) Decreases (3) st 1 increases then decreases (4) None of these (17.) For which of the following pair Newland octave rule is not applicable : (1) Li, Na (2) C,Si (3) Mg,Ca (4) Cl, Br (18.) Which of the following element was present in Mendeleev's periodic table : (1) Ga (2) Ge (3) Both (4) None of these (19.) Which of the following set of atomic number represents representative element : (1) 5,13,30,53 (2) 11,33,58,84 (3) 5,17,31,58 (4) 9,31,53,87 (20.) The electronic configuration of an element is 2 1s , 2 6 2 6 10 2 2 ,2 ,3 ,3 ,3 ,4 s p s p d s . What is the atomic number of next element of the same group : (1) 38 (2) 48 (3) 58 (4) 82 (21.) Given below are two statements : Statement I: A plot of v against atomic weight gave a straight line. Statement II : The sixth period (n = 6) contains 32 elements and successive electrons enter 6 , 4 ,5 s f d and 6 p orbitals, in the order filling up of the 4 f orbitals begins with cerium (Z = 58) and ends with lutetium (Z 71 = ) to give the 4f inner transition series. In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are incorrect (2) Statement I is correct but Statement II is incorrect (3) Statement I is incorrect but Statement II is correct (4) Both Statement I and Statement II are correct. (22.) The characteristics of elements X Y, and Z with atomic numbers respectively 33,53 and 83 are : (1) X is metalloid, Y is a non-metal and Z is a metal (2) X is metals, Y is a non-metal and Z is a metalloids
(3) X, Y and Z are metals (4) X Z, are non-metals and Y is a metalloid (23.) The set that contains atomic numbers of only transition elements is : (1) 37,42,50,64 (2) 21,25,42,72 (3) 9,17,34,38 (4) 21,32,53,64 (24.) An element which is recently discovered is placed in th 7 period and th 10 group. IUPAC name of the element will be : (1) Unnilseptium (2) Ununnilium (3) Ununbium (4) None (25.) Which of the following elements forms basic oxide : (1) Mg (2) Cl (3) N (4) S (26.) The correct order of 2nd I.E. of C, N, O and F : (1) C N O F    (2) O N F C    (3) O  F  N  C (4) F O N C    (27.) Consider the following diagram : Select the correct option for Vander walls radii : (1) C (2) b /2 (3) a (4) c / 2 (28.) An element has electronic configuration   7 Xe 4f , 1 2 5 ,6 d s . It belongs to : (1) s-block (2) p-block (3) d-block (4) f-block (29.) A sudden large jump between the values of rd 3 and th 4 ionisation energies of an element would be associated with electronic configuration : (1) 2 2 6 1 1 s ,2 s ,3p ,3 s (2) 2 2 6 2 1 1 s ,2 s ,2p ,3 s ,3p (3) 2 2 6 2 2 1 ,2 ,2 ,3 ,3 s s p s p (4) 2 2 6 2 1 s ,2 s ,2p ,3 s (30.) The element which has highest electron affinity : (1) Oxygen (2) Sulphur (3) Nitrogen (4) Phosphorus (31.) Which of the following has maximum number of unpaired electrons : (1) 2 Mg + (2) 3 Ti + (3) 3 V + (4) 2 Fe + (32.) Which of the following statement is wrong : (1) All the actinides are synthetic (man made) element