Tiêu đề DPP-2 SOLUTION.pdf ✅

CLASS : XIth SUBJECT : CHEMISTRY DATE : DPP No. : 2 1 (b) It is a fact. 2 (b) The maximum temperature at which gas can be liquefied is called its critical temperature. The gas which have high boiling point will change into liquid and so critical temperature of gas will be more 4 (a) 2KI + Cl2⟶I2 + 2KCl 5 (a) Only N2 has 1σ + 2π bonds in its molecule. 7 (d) Only Al among these does not react with HNO3. 8 (c) NH4Cl⟶NH3 + HCl 1 0 0 0 1 1 ∴ Calculated mol. wt. ∝ 1 molecule Experimental mol. wt. ∝ 2 molecule 9 (d) Thermal stability of hydrides of nitrogen family decreases gradually from NH3 to BiH3. 10 (b) When an electric discharged is passed through Ne gas in a tube at low pressure, an orange red light is produced which is effective in the formation of chlorophyll and is used in green houses 11 (d) XeO3 is an explosive compound when dry and its explosion power is 22 times more than TNT I2 + CCl4 Excess of Cl2 water Colourless + I Violet 2 Topic :-THE P-BLOCK ELEMENTS-2 Solutions
12 (a) The most abundant element in the earth crust is oxygen. 13 (b) It is a fact. 14 (b) It is a fact. 16 (c) SO2 acts as reducing agent in aqueous medium, as acid in basic medium and oxidizing agent in neutral medium. 17 (b) CaC2 + N2⟶CaCN2 + C 18 (c) Cl2 is oxidised (Cl0 2⟶Cl5+ 2 + 10e) and reduced (Cl2 2e 2Cl―)as well. 19 (c) F2 + H2O⟶2HF + 1 2 O2 20 (b) Cu hydroxide forms complex with NH3.
ANSWER-KEY Q. 1 2 3 4 5 6 7 8 9 10 A. B B D A A B D C D B Q. 11 12 13 14 15 16 17 18 19 20 A. D A B B C C B C C B