Dalton's Atomic Theory डाॅल्टन का परमाणु सिद्धान्त Class 11 NCERT Chapter 1 L-5 ? By Poonam Ma'am

Give the order of the following : (a) 1 (b) 1000 (c ) 499 (d) 500 (e) 501) (f) 1 AU (1.496 xx 10^(11) m) (g) 1 Å (10(-10)m ) (h) Speed of light (3.00 xx 10^(8) m//s) (i) Gravitational constant (6.67 xx 10^(-11) N-m^(2)//kg^(2)) (j) Avogadro constant (6.02 xx 10^(23) mol^(-1)) (k) Planck's constant (6.63 xx 10^(-34) J-s) (l) Charge on electron (1.60 xx 10^(-19) C) (m) Radius of H - atom (5.29 xx 10^(-11)m) (n) Atmospheric pressure (1.01 xx 10^(5) Pa) (o) Mass of earth (5.98 xx 10^(24)kg) (p) Mean radius of earth (6.37 xx 10^(6)m)

The first eight ionisation energies for a particular neutral atom is as given below. All values are expressed in kJ mol^(-1) . Which oxidation states (s) is // are not possible of the atom ? {:(1st,2nd,3rd,4th,5th,6th,7th,8th,),(1.31,3.39,5.30,7.47,10.99,13.33,71.33,84.01,):}

Compute the surface temperature of the sun from the following data: Distance of earth from the sun R=1.469xx10^(11)m Radius of the sun r=6.928xx10^(8)m Solar constant S=1.39xx10^(3)Wm^(-2) Stefan's constant sigma=5.73xx10^(-8)Wm^(-2)K^(-4)

Consider the following reaction: KClO_(3)(s)overset(Delta)toKCl(s)+O_(2)(g) , yield =60% Zn(s)+H_(2)SO_(4)(aq)toZnSO_(4)(aq)+H_(2)(g) , yield =50% 2H_(2)(g)+O_(2)(g)to2H_(2)O(l) , yield =50% What volume of 0.2 M H_(2)SO_(4) solution is required to produce enough H_(2) to completely react with O_(2) liberated due decomposition of 1.225 g KClO_(3) . (Molecular weight of KClO_(3)=39+53.5+3xx16 =122.5g mol^(-1) )

For the following A.P.'s , write the first term and common difference : (i) 2, 5, 8, 11, .... (ii) -5, -1, 3, 7, ..... (iii) 0.6, 1.7, 2.8, 3.9, ...... (iv) 5, 2, -1, -4, .....

The approach to the following equilibrium was observed kinetically form both directions: [PtCl_(4)]^(2-) +H_(2)O hArr [Pt(H_(2)O)Cl_(3)]^(ɵ)+Cl^(ɵ) At 25^(@)C it was found that at 0.3 inoic strength - (Delta [PtCl_(4)]^(2-))/(Delta t) = (3.9 xx 10^(-5)s^(-1))[PtCl_(4)]^(2-) - (2.1 xx 10^(-3) L mol^(-1) s^(-1))[Pt(H_(2)O)Cl_(3)]^(ɵ)[Cl_(3)^(ɵ)] What is the value of k for the complexation of the fourth Cl^(ɵ) by Pt(II) at 0.3 ionic strenght.