CHEMISTRY TEXTBOOK

6.6 Collision theory of bimolecular reactions 6.6.1 Collision between reactant molecules Chemical reactions occur as a result of ...

Do you know? For a gaseous reaction at 298 K, Ea = 75 kJ/mol. The fraction of successful collisions is given by f = e-Ea/RT = e- ...

Fig. 6.9 : Comparison of fraction of molecules activated at T 1 and T 2 Hence, log 10 k 2 k 1 = Ea 2.303 R 1 T 1 1 ( T 2 ( = ...

A k = antilog 20.89 = 7.78 × 10^20 and k = A 7.78 × 10^20 = 1.6 × 10^13 s-1 7.78 × 10^20 = 2.055 × 10-8 s-1 6.8 Effect of a cata ...

Choose the most correct option. i. The rate law for the reaction aA + bB P is rate = k[A] [B]. The rate of reaction doubles if ...

a. increase of temperature b. increase of concentration of NO c. increase of concentration of Cl 2 d. increase of concentrations ...

x. Derive the integrated rate law for first order reaction. xi. How will you represent first order reactions graphically. xii. D ...

7.1 Introduction : You have learnt in Std. XI that in the p-block elements the differentiating electron (the last filling electr ...

7.3 Electronic configuration of elements of group 16, 17 and 18: : The general electronic configuration of the group 16 elements ...

Problem 7.1 : Elements of group 16 generally show lower values of first ionisation enthalpy compared to the elements of correspo ...

Problem 7.2 : The values of first ionisation enthalpy of S and Cl are 1000 and 1256 kJ mol-1, respectively. Explain the observed ...

Problem 7.6 : Noble gases have very low melting and boiling points. Why? Solution : Noble gases are monoatomic, the only type of ...

iv. It forms only one oxoacid (HOF) while other halogens form a number of oxoacids. v. Hydrogen fluoride is a liquid (b.p. 293K) ...

The hydrides of group 16 elements are weakly acidic. The acidic character of the hydrides increases, while thermal stability dec ...

Chlorine oxides, Cl 2 O, ClO 2 , Cl 2 O 6 and Cl 2 O 7 are highly reactive oxidising agents and tend to explode. ClO 2 is used a ...

Tellurium exists in two allotropic forms (i) crystalline and (ii) amorphous. Polonium reveals two allotropic forms α and β (bot ...

Table 7.7 Allotropes of sulfur Rhombic Sulfur (α - Sulfur) Monoclinic Sulfur (b - Sulfur) Color Pale Yellow Bright yellow solid ...

O H Cl O H Cl O O H Cl O O O H Cl O O O iii. Di or pyrosulfuric acid, H 2 S 2 O 7 HO S HO O S HOO S HO O O Table 7.8 Oxoacids of ...

2PbO2(s) ∆ 2PbO(s) + O2(g) By decomposition of hydrogen peroxide in presence of catalyst such as finely divided metals and mang ...

Problem 7.9 : High concentration of ozone can be dangerously explosive. Explain. Solution : i. Thermal stability : Ozone is ther ...