The number of sulphur atoms present in 0.2 mole of sodium thiosulphate is
(N=Avogadro number)
A 4N
B 0.2N
C 0.4N
D 0.1N

How many N atoms are present in 0.25 mol of N_(2) ?

The number of diagonal matrix, A or order n which A^3=A is a. is a a. 1 b. 0 c. 2^n d. 3^n

Calculate number of electron present in 9.5" g of" PO_(4)^(3-) : (a) 6 (b) 5N_(A) (c) 0.1N_(A) (d) 4.7N_(A)

The number of real negative terms in the binomial expansion of (1+i x)^(4n-2),n in N ,x >0 is

Let n denote the number of all n-digit positive integers formed by the digits 0, 1 or both such that no consecutive digits in them are 0. Let b_n = the number of such n-digit integers ending with digit 1 and c_n = the number of such n-digit integers ending with digit 0. The value of b_6 , is

Let a={1,2},B={0} then which of the following is correct a.Number of possible relations from AtoB is 2^0=1 b.Number of void relations from AtoB is not possible c.Number of possible relations from AtoB are 4 d.Number of possible relations are equal to 2^(n(A)+n(B))

The number of real negavitve terms in the binomial expansion of (1 + ix)^(4n-2) , n in N , n gt 0 , I = sqrt(-1) , is

Nucleus A decays into B with a decay constant lamda_(1) and B further decays into C with a decay constant lamda_(2) . Initially, at t = 0, the number of nuclei of A and B were 3N_(0) and N_(0) respectively. If at t = t_(0) number of nuclei of B becomes constant and equal to 2N_(0) , then

If the point representing the complex number z_alpha is a point on or inside the circle having centre (0+i0) and radius alpha then maximum value of |z_1+z_2+……+z_n|= (A) (n(n+3))/2 (B) (n(n+1))/2 (C) (n(n-1))/2 (D) none of these

For the reaction N_(2)+O_(2)hArr 2NO at equilibrium number of moles of N_(2),O_(2) and NO pressent in the system per litre are 0.25 mole, 0.05 moles and 1.0 mole respectively What will be the initial concentration of N_(2) and O_(2) respectively