Indicate the σ and π bonds in the following molecules : Suggest a list of the substances where carbon can exhibit oxidation states from -4 to +4 and nitrogen from -3 to +5. What do you understand by bond pairs and lone pairs of electrons? Illustrate by giving one example of each type. What would be the SI unit for the quantity pV 2 T 2/ n? of ammonia and 20.00 g of oxygen?Įxplain why is sodium less reactive than potassium? What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. In Ostwald's process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. Recently Viewed Questions of Class 11 Chemistry What is meant by the term bond order? Calculate the bond order of: N 2, O 2,O 2 +,and O 2. 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)
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(b) MnO 4 – (aq) + SO 2 (g) → Mn 2+ (aq) + HSO 4 – (aq) (in acidic solution) (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.