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Analysis shows that nickel oxide has the formula Ni0.98O1.00 . What fractions of nickel exist as Ni2+ and Ni3+ ions? ...
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In a sample of the non-stoichiometric crystal Fe0.96O , the percentage of cationic sites occupied by Fe3+ ions is A) 8.0 B) 6.0 C) 4.0 D) 2.0 ...
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Pls explain why major nitration pdt. is para to Cl in both the cases given below. *Image* ...
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A rough cricular platform is fixed to a frictionless vertical axle.Its radius = 1m and M.I. = 200 kg-m2.A man of 50 kg stands on the edge of it.All are at rest initially.Then the man starts walking along the edge with a const ...
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A conducting spherical shell of rad. R is placed concentrically inside another similar shell of rad. 2R. The inner shell has a charge Q. If it's connected to the outer shell by a coducting wire , find loss in elec.energy .... ...
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(A) : When a body is connected to earth,all its charge flows to earth and it becomes electrically neutral. (R) : Electric potential of earth is zero,so the body connected to earth should also attain zero potential. ...
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a,b,c are 3 nos. such that 1 > a,b,c > 0 and a + b + c = 2 Then show that \frac{a}{(1-a)}\frac{b}{(1-b)}\frac{c}{(1-c)} ≥ 8 This may be very simple but I'm getting LHS ≤ 8 instead of ≥ 8 . I'm not able to find my ...
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*Image* Which of the following is the correct order of rate of solvolysis of the above ? (A) I < II << III (B) I >> II > III (C) I ≈ III > II (D) I ≈ III <II ...
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*Image* Bhaiyyas and Sirs PLEASE let others try first. (Thank You) ...
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ƒ : R → R is a twice diffentiable fn. such that ƒ'(x) = ƒ(1-x) for all x \epsilon R Given ƒ(0) = 1 , Find ƒ(1) (A) e - 2 (B) ln 2 - 1 (C) sec 1 + tan 1 (D) cos 1 + sin 1 ...
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This may be simple but I'm not too comfortable with ionic(even the simplest[2][2]). So pls help !!! A young scientist performs the foll. set of experiments to find the pH of the resulting soln. at diff. equivalence pts. ,the ...
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A uniform rod of length L,cross-section area A and Young's modulus Y is acted upon by the forces as shown in the figure. *Image* The elongation in the rod is λ (FL/AY). The value of λ is : (A) 4 (B) 3 (C) 11/4 (D) 4/3 ...
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If a1,a2,a3..............an are n postive numbers in arithmetic progression with common difference d≠0 and Sn = a1 + a2 + ... + an a. Sn __ n - 2(√a1 + √a2 +...+√an) (>,<,=,≤,≥ or cannot say) b. 2Sn2 > (n ...
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Q1. 0∫10 [ (x2+2)/(x2+1) ] dx = (A) 0 (B) 2 (C) 5 (D) none of these ( [.] denotes G.I.F. ) ...
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A technique of solving diffential equations deals with the Laplace Transformations of a function. Let ƒ(t) be a function of 't' defined for all +ve values of t , then 0∫∞ e - st ƒ(t) dt ; is called the Laplace transform ...
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What reagents (think of all possible reagents that can be used) which can perform this conversion successfully ? *Image* I know three;lets see how many you can think of !! [6][6] ...
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Let f(x) be a differentiable funtion satisfying (x-y).f(x+y) - (x+y).f(x-y) = 4xy(x2 - y2) for all x,y \in R , and f(1)=1. Then , ........................... ...
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Oct 1,8 diol + HBr ----> (T) (Has only 1 Br along with Carbon(s),Hydrogen(s) & Oxygen(s)) (T) + Cl (Me)3 Si + H3O+ ---> (U) (U) + H C ≡ C Li --->(V) (V) + n-BuLi + CH3CH2Br ---> (W) (W) + HOH ---> (X) (X) + C ...
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A hollow cone of dimensions R,H , is hung vertically , (completely)inside a liquid of density 'p' , its vertex just touching the liquid surface.The force due to the liquid acting on the suface of the cone is kÎ pgHR2 where k ...
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Four equidistant slits of the same width are made one above the other on an opaque sheet & illuminated by a monochromatic parallel beam of light perpendicular to the sheet.Point P & Q are on the screen directly in front of th ...
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Let f(x) be a continuous and differential fn. (A) : There exists a 'c' in [2,6] such that (f(6))2 - (f(2))2 = 8f(c)f '(c) (R) : By LMVT, f(6) - f(2) = 4f '(c) for some 'c' in [2,6] and By IVT, f(6) + f(2) = 2f(c) for some 'c' ...
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If y is a fn. of x such that y(x-y)2=x , then Find ∫dx/(x-3y) ...
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1) x , y , z are +ve nos. such that x + y + z = 1 (A) : [ (1-2x)+(1-2y)+(1-2z) ]/3 ≥ [ (1-2x)(1-2y)(1-2z) ]1/3 (R) : For +ve nos. A.M. ≥ G.M. A,B,C,D have the same usual meanings. ...
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a2 + b2 + c2 + r2 + rA2 + rB2 + rC2 + R2 = ........... (A) 7 R2 (B) 7 r2 (C) 17 R2 (D) 17 r2 a,b,c : sides of ∆le ABC r : inradius rA,rB,rC : exradii R : circumradius ...
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k is an integer, p is a prime no. such that x2+kx+p=0 has distinct +ve integral roots. Find the value of (k+p). ...
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MULTIPLE OPTIONS CORRECT The equation x2 + 2xy + x - 3 - y + y2 = 0 represents a conic with (A) eccentricity 1 (B) vertex (1.5,-1.5) (C) axis as x + y = 0 (D) length of latus rectum 1 ...
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The curve y = 17 - 8 √|x| and the lines x = ± 4 are drawn on a graph paper. The area bounded by these curves and the x-axis is cut out to yield the figure ABCDEFA,where D & F are (±4,0) and E is (0,0). A,B & C are points ...
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Given 1∫2 ex2 dx = a , Find the value of e∫e4 √(logex) dx . ...
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If 0∫x f(t)dt = x + x∫1 t f(t)dt , Find f(1). I am getting two answers for this!! Pls. try it & explain!! ...
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1) Let f(x) be a polynomial satisfying f(0)=2, f' (0)=3 and f'' (x)=f(x). Then find f(4). ...
