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SOLUTION TO TODAY'S DRILL 🔥 ✅ 1. C - d - orbitals Transition metals have characteristic Properties different from those of other groups elements because of thier partially filled or incompletely filled d-orbitals 2. D - Sn Sn, Al, Pb, Sn and Be are amphoteric metals hence would dissolve in both acids and bases to liberate Hydrogen Sn + 2NaOH + 2H2O ==> Na2Sn(OH)4 + H2 3. C - Ca K/Na respectively react explosively/vigorously with cold water CA reacts slowly with cold water releasing H2 gas in bubbles only but rapidly with warm or hot water Mg/Al/Zn/Fe/Pb/ react with steam at red heat Cu/Hg/Ag/Au dies not react with water in any form 4. C - blast reduction This is the modern direct-reduction method ADVANTAGES OF BLAST REDUCTION 1. Cheap sources of the reducing gases 2. Opportunity to produce all grades of steels 5. C - mordant Al(OH)3 is used as mordant which helps dyes to stick to clothes 6. D - cooling a molten mixture of the metals Alloys are prepared by heating the mixture of the metals and cooling them. Upon solidifying, the alloy must not separate into distinct layers of elements. 7. D - partially filled d orbitals Complete in-filling of the d orbital offers stability to the electrons. The partial filling of the d orbitals accounts for the instability of the transition metals. 8. D - reacts with oxygen and carbon IV oxide Na reacts readily (but not vigorously) with atmospheric gases except the N2 and the nobles gases 4Na + O2 ==> 2Na2O Na2O + H2O ==> 2NaOH 2NaOH + CO2 ==> Na2CO3 Because of this reason, sodium is stored under paraffin oil, toluene or naphtha 9. B - green when viewed through a blue glass The brick red flame of calcium appears green when viewed through a blue glass 1. Na+ ==> Golden-yellow flame invisible when viewed through a blue glass 2. K+ ==> Lilac flame which appears crimson when viewed through a blue glass 3. Cu²+ ==> Deep green or bluish green flame 4. Pb²+ ==> Blue flame 5. Ba²+ ==> Light green 10. A - steel and permalloy 1.Brass-Cu; Zn 2.Bronze-Cu, Sn 3. Stainless steel-Fe; C; Ni; Cr 4.Steel-Fe; C 5.Duralumin-Al; Cu; Mg; Mn 6.Alnico-Fe; Al; Ni; CO 7.Soft solder-Pb; Sn 8. Hard Solder-Pb; Sn 9.Permalloy- Fe;Ni DROP A REACTION IF YOU'VE LEARNED SOMETHING TODAY ❤️

QUESTION DRILLS 1 ON METALS 🔥✅📚 1. Metals of the first transition series have special properties which are different from those of groups I and II elements because they have partially filled A. s orbitals B. p orbitals C. d orbitals E. f orbitals 2. Hydrogen can be displaced from a hot alkaline solution by A. Fe B. Cu C. Ca D. Sn 3. The metal that liberates hydrogen from cold water in bubbles only is A. Na B. K C. Ca D.AI 4. The modem process of manufacturing steel from iron is by A. treatment with acids B. oxidation C. blast reduction D. treatment with alkalis 5. Aluminum hydroxide is used in the dyeing industry as a A. salt B. dye C. mordant D. dispersant 6. Alloys are best prepared by A. electroplating B. arc-welding C. reducing a mixture of their metallic oxides D. cooling a molten mixture of the metals 7. Transition metals possess variable oxidation states because they have A. electrons in the d orbitals B. electrons in the s orbitals C. a variable number of electrons in the p orbitals D. partially filled d orbitals 8. Sodium metal is always kept under oil because it A. readily reacts with water B. is reduced by atmospheric nitrogen C. reacts vigorously on exposure to air D. reacts with oxygen and carbon(IV)oxide 9. In a flame test for calcium, the flame appears A. blue when viewed through a blue glass B. green when viewed through a blue glass C. orange-red when viewed through a blue glass D. Brick-red when viewed through a blue glass 10. Which of the following alloys contains Iron? A. Steel and permalloy B. Duralumin and steel C. Soft solder and duralumin D. Brass and bronze SUBMIT YOUR ATTEMPT IN THE COMMENTS. SOLUTION DROPS HERE BY 3PM.

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