Calculate the magnetic moment (spin-only) of a trivalent ion in aqueous solution if its atomic number is 22 .

Read the passage carefully and answer the questions based on the passage:
Alcohols are versatile compounds as they can act as both nucleophile and electrophile. They undergo reactions based on cleavage of \(\mathrm{O}-\mathrm{H}\) and \(\mathrm{C}-\mathrm{O}\) bonds. The cleavage of \(\mathrm{O}-\mathrm{H}\) bond reflects the acidic character of alcohols. However they are weaker acids than water, phenol and carboxylic acids. Alkoxide ion formed by loss of proton from the OH group of alcohols reacts with water to form the corresponding conjugate acid - base pair. They act as Bronsted base due to presence of unshared electron pairs on oxygen.Both alcohols and phenol react with carboxylic acids, acid chlorides and anhydrides to form esters. The introduction of acetyl group in alcohols or phenol is known as acetylation. Alcohols react with hydrogen halides to form alkyl halides which form the basis of Lucas test. They also undergo acid catalyzed dehydration to form alkenes. Alcohols can be easily oxidized with variety of oxidizing agents. The nature of the product depends on the type of oxidizing agent and the nature of alcohol.
Lucas reagent is

Derive the electronic configuration of \(Ce ^{3+}\) ion by using Hund's rule.

Answer the question on the basis of passage given below :
For the transition elements
Sc \(\quad\) Ti \(\quad\) V \(\quad\) Cr \(\quad\) Mn\(\quad\) Fe \(\quad\) Co \(\quad\) Ni \(\quad\) Cu \(\quad\) Zn
Atomic numbers :
21 \(\quad\) 22 \(\quad\) 23 \(\quad\) 24 \(\quad\) 25 \(\quad\) 26 \(\quad\) 27 \(\quad\) 28 \(\quad\) 29 \(\quad\) 30 \(\quad\)
Which transition element has large enthalpy of atomization \(\Delta H_a^{\circ} \text{ (kJ mol}^{-1}\))?

What is the formula for the Tetraammineaquachloridocobalt (III) chloride coordination compound?

Identify the final product \((C)\) in the reaction given below:
\(CH _3 CH _2 I + NaCN \rightarrow A \rightarrow\) (Partial hydrolysis \(\left./ OH ^{-}\right) \rightarrow b + NaOH + Br _2 \rightarrow C ?\)

The reaction shown above is known as

Consider the following data of expenses (in lakhs) of an organization year wise:

Year	2001	2002	2003	2004	2005
Expenses (Rs. lakh)	160	185	220	300	510

Then expected expenses trend for the year 2006 using method of least squares is:

A light with an energy flux of 25 \( W/cm^2 \) falls on a non-reflecting surface at normal incidence. If the surface has an area of 50 \( cm^2 \) and the total energy falling on the surface is \( 10 \times 10^5 \) J. The total duration of time of the incidence of light is

Which among the following cause pneumonia in human ?
(A) Streptococcus pneumoniae
(B) Wuchereria bancrofti
(C) Haemophilus influenzae
(D) Salmonella typhi
Choose the correct answer from the options given below :

Progestasert and LNG-20 are the examples of:

A charge q is placed at the centre of a sphere of radius r. The electric flux crossing the sphere is \( \Phi \). If both the charge and radius of the sphere are doubled, the electric flux crossing the sphere will be

Consider the following hypothesis test :
\(H_0: \mu=15\)
\(H_a: \mu \neq 15\)
A sample of 50 provided a sample mean of 14.15 . If the sample standard deviation is 3 , then the value of the teat statistic in \(t\) - test is