Chapters	The p-Block Elements, The d-and f-Block Elements	Time Allotted:  45 Minutes	Test Date:  21-Jun-2012
Class	XII-Science

Q1. Sulphur is a non-metal belonging to group VI of the periodic table. Sulphur reacts with oxygen to form sulphur dioxide and trioxide. These oxides react with water to form an acid. The acid formed from these oxides is the main cause of acid rains. The described acid is A : H2SO4 B : H2CO3 C : H2S2O7 D : H2SO3

Q2. [Xe] 4f145d66s2 is the ground state electronic configuration of which d block element? A : Palladium B : Cadmium C : Osmium D : Iridium

Q3.The information in which alternative completes the given statement? A : i ii Br F3 BF3 B : i ii ClF3 AlF3 C : i ii BF3 AlF3 D : i ii AlF3 BrF3

Q4. Which of the following statements regarding interstitial compounds is incorrect? A : They are very hard and rigid. B : They are chemically very reactive. C : They show conductivity similar to that of the pure metal. D : They have high melting points, which are higher than those of the pure metals.

Q5. Which of the following forms of sulphur is paramagnetic in nature? A : S2 B : S6 C : S8 D : S12

Q6. Which of the following elements is regarded as a transition element? A : Zn B : Cu C : Cd D : Hg

Q7. Which of the following CORRECTLY represents sulphuryl monochloride? A :SO2Cl2 B :SCl2 C :S2Cl2 D :SCl3

Q8. Which of the following statements is incorrect regarding lanthanoids? A : They are usually good conductors of heat and electricity. B : The most common oxidation state displayed by them is +3. C : They are coloured elements and do not react with air easily. D : Their atomic size decreases gradually on moving from left to right.

Q9. Nitrogen oxides present in atmosphere react with water to form an acid. This acid, along with precipitation, falls on Earth as acid rain. The described acid is A : HNO3 B : NaNO3 C : H2SO4 D : H2CO3

Q10. . Lanthanoids belong toseries whereas actinoids belong to series. The information in which alternative completes the given statement? A : i ii 3f 4f B : i ii 5f 4f C : i ii 4f 5f D : i ii 4f 3f

Q11. The correct increasing order of ionization enthalpy of the noble gases is A : Xe < Ar < Ne < Kr B : Xe < Kr < Ar < Ne C : Kr < Ar < Xe < Ne D : Ne < Ar < Kr < Xe

Q12. If the atomic number of an element M is 29, then the ‘spin only’ magnetic moment of ion is A : 1.23 BM B : 1.73 BM C : 2.83 BM D : 3.87 BM

Q13. Phosphorus pentachloride reacts with ethanoic acid to give A : CH3Cl, CO2, and PCl3 B : CH3COCl, POCl3, and HCl C : CH3COCl, HOCl, and PCl3 D : CH3CH2Cl, PCl3, and COCl2

Q14. Which of the following ions will exhibit the maximum paramagnetic behaviour? A : Sc(+2) B : V(+2) C : Mn(+2) D : Ni(+2)

Q15. Which of the following p block elements is used as a semi-conductor in transistors, thermistors, and photo conductors? A : As B : Na C : Al D : In