Solve your IGNOU Doubts

Question:

What are the possible number of isomers for the octahedral complex ion

$\left [ Co(NH_{3}) C1\right ]^{+}?$

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Question:

Why do lanthanoids mainly show ionic bonding? What is the nature of their melting and boiling points?

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Question:

What is the composition of brass? Is it harder than pure copper? Give its uses.

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Question:

b) Why zinc and cadmium are soft metals?

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Question:

a) What is the ground state configuration of Sc+ ion? Justify.

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Question:

A metal sheet has, on the average, 5 defects per 10 sq. ft. Assuming a Poisson distribution, calculate the probability that a 15 sq. ft. piece of the metal sheet will have at least 4 defects

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Question:

Out of 90 applicants for a job, 60 people get selected after the interview. If five applicants are selected at random, calculate the probability that 2 will get selected.

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Question:

A random variable X has the following probability distribution: $f(x)=\left\{\begin{matrix} \frac{4}{\pi (1+x^{2})}\, for &0<x<1 \\0 & elsewhere \end{matrix}\right.$

Calculate E(X)

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Question:

An unbiased coin is tossed three times. If A is the event that a head appears on each of the first two tosses, B is the event that a tail occurs on the third toss and C is the event that exactly two tails appear in the three tosses, show that:

i) Events A and B are independent
ii) Events B and C are dependent.

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Question:

Using Green’s Theorem evaluate the integral $\oint_{C}^{}(xydx+x^{2}y^{2}dy)$ where C is the triangle with vertices (0,0),(1,0) and (1,2).