Doubtly
@Doubtly · Joined Feb 2021
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- The ratio of series limit wavelength of Balmer series to wavelength of first line of paschen series is ………. 7/36 is answer https://lh3.googleusercontent.com/-djiaQ2JfDPE/YayM6Plq9AI/AAAAAAAAC2o/a8czELAm8tUaT_CogztAF--yBfNQCikxwCNcBGAsYHQ/image.png 1
- Find the initial momentum of electron if the momentum of electron is changed by pm and the De Broglie wavelength associated with it changes by 0.50 % Initial momentum is 200p_m Explaination: dλoverλ× 100 =0.5 dλoverλ× 100 =0.5over100=1over200 and triangle p=p_m p=hoverλ, differentiating dp... 1
- Given that x = -9 is a root of ||The other two roots are ______ and ________ . the correct answer is available here watch this video by neha mam 2
- If the lines ax + y + 1 = 0, x + by + 1 = 0 and x + y + c = 0 (a, b, c being distinct and different from 1 ) are concurrent, then value of The correct answer is option c) 1 if the given lines are concurrent , then beginarray|ccc|cc| a& 1 & 1 \\ 1 & b & 1\\ 1 &1 & c\\ endarray=0... 1
- As per IUPAC nomenclature, the name of the complex [Co (H2O)4(NH3 )2]C13 is correct option is d) diamminetctraaquacobalt (III) chloride First of all, the compound has complex positive part [Co(H₂O)₄(NH₃)₂]₃₊ therefor... 1
- The oxidation state of Fe in the brown ring complex [Fe(H2O)5NO]SO4 is:(a) + 1 (b) + 2 (c) + 3 (d) + 4 Corret option is a) +1 Explaination :: [Fe(H₂O)₅NO]SO_(4 → ([Fe(H₂O)₅NO] )⁺²+(SO₄)⁻² ) (fe^+)⁺¹ =+2 charge on fe= +1 1
- The number of enantiomer in a glucose molecule is (a) 16 (b) 12 (c) 4 (d) 9 Correct option is A) 16 Explaination: Glucose molecule the number of chiral carbon is = 4 Formula for enantiomer, = 2ⁿ total number of enant... 1
- Find out the number of enantiomer, meso isomer and total number of optical isomers for the following compound Correct option is C) 4,0,4 explaination : Number of enantiomer = 2n (n is the number of chiral carbon ) Number of meso isomer = 0 Total numb... 1
- computer science college website project maharashtra board Index.html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta na... 2
- Create output for this compter science terms in computer The code for this is <html> <title>TERMS IN COMPUTER</title> <body> <h2><b>TERMS IN COMPUTER</b></h2> <d1> <dt>Software</dt> <dd><b>Software... 2
- Area (in sq. units) of the region outside |x|/2 + |y|/3 = 1 and inside the ellipse x^2/4 + y^2/9 = 1 is The correct answer is option c) 6( π-2 ) Explaination:: Area of Ellipse =πab=6π Area |x|over2+|y|over3=1 is =1over2(d₁d₂)=1over2(4)(6)=12 so... 1
- Two capacitors C1 and C2 are charged to 120 V and 200 V, respectively. correct answer is option (c) 3C₁ = 5C_(2 ) Explaination:: For potential to be made zero, after connection 120C₁ = 200C₂ 6C₁ = 10C₂ 3C₁ = 5C₂ 1
- An electric dipole is placed at an angle of 30º to a non-uniform electric field. The dipole will experience Correct answer is option (d) a torque as well as a translational force 1
- The resistance of a wire at room temperature 20°C is found to be 20W. Now to increase the resistance by 20%, The correct answer is 124 C 2
- A circular disc rolls down an inclined plane. The ratio of the total kinetic energy to the rotational kinetic energy is The correct answer is option b) 3:1 1
- If the cost of bananas is increased by Rs. 10 per dozen, one can get 3 dozen less for Rs.600. Let x be the original cost of 1 dozen bananas , for Rs. 600 we gets y dozens. xy =600 .................... 1 y=600over x By increasing the c... 1
- Find the first two terms of the sequence for which Sn is given below Sn=n^2 (n+1) Answer is 2 , 10 Solution :: To find the first term substitute n=1 in formula S₁=1²(1+1)=1(2)=2 To find the second term, substitute n = 2 in... 1
- Prove. Sec2 A + Cosec2 A = Sec2 A Cosec2 A Proof :: LHS = sec² A + cosec² A =1over(cos²A)+1over(sin²A)=(sin²A+cos²A)over(cos²A sin²A) =1over(cos²A sin²A)=sec²A cosec²A=RHS 1