(iii) Which atoms are indicated by the following configurations? (ii) What are the atomic numbers of elements whose outermost electrons are represented by (a) 3 s 1 (b) 2 p 3 and (c) 3 p 5? : (i) Write the electronic configurations of the following ions: (a) H – (b) Na + (c) O 2–(d) F – What is the change in internal energy for the process? In a process, 701 J of heat is absorbed by a system and 394 J ofwork is done by the system. Which hybrid orbitals are used by carbon atoms in the following molecules? (b) Write suitable chemical equations to show their nature. (a) Classify following oxides as neutral, acidic, basic or amphoteric:ĬO, B 2O 3, SiO 2, CO2, Al 2O 3, PbO 2, Tl 2O 3 Write IUPAC names of the following compounds :ĭraw the Lewis structures for the following molecules and ions: H2S, SiCl4, BeF2,, HCOOH Recently Viewed Questions of Class 11 ChemistryĬalculate the volume occupied by 8.8 g of CO 2 at 31.1☌ and 1 bar pressure. What will be the minimum pressure required to compress 500 dm 3 of air at 1 bar to 200 dm 3 at 30☌? What mass of CaCO 3 is required to react completely with 25 mL of 0.75 M HCl?ĭensity of a gas is found to be 5.46 g/dm 3 at 27 ☌ at 2 bar pressure. Which one of the following will have largest number of atoms?Ĭalcium carbonate reacts with aqueous HCl to give CaCl 2 and CO 2 according to the reaction,ĬaCO 3(s) + 2 HCl (aq) → CaCl 2(aq) + CO 2(g) + H 2O (l) (iii) 100 atoms of A + 100 molecules of B In a reaction A + B2 → AB2 Identify the limiting reagent, if any, in the following reaction mixtures. (d) Cr 2O 7 2– + SO 2(g) → Cr 3+ (aq) + SO 4 2– (aq) (in acidic solution)ĭetermine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass. (c) H 2O 2 (aq) + Fe 2+ (aq) → Fe 3+ (aq) + H 2O (l) (in acidic solution) (b) MnO 4 – (aq) + SO 2 (g) → Mn 2+ (aq) + HSO 4 – (aq) (in acidic solution)
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(a) MnO 4 – (aq) + I – (aq) → MnO 2 (s) + I 2(s) (in basic medium) (iii) 2 moles of carbon are burnt in 16 g of dioxygen.Ĭalculate the wavelength of an electron moving with a velocity of 2.05 × 10 7 ms –1.īalance the following redox reactions by ion – electron method : (ii) 1 mole of carbon is burnt in 16 g of dioxygen. is 3.0 × 10 –25 J, calculate its wavelength.Ĭalculate the amount of carbon dioxide that could be produced when The mass of an electron is 9.1 × 10 –31 kg.