In Octahedral coordination entities :

Helium and element ' \(X\) ' have outer electron configuration of ns2. Identify the element ' \(X\) '.

What is the symbol of technetium element ?

Hoffmann bromamide degradation method is used for preparation of

The increasing order of magnetic behaviour for the following complexes is
A. \([Ti(H_2O)_6]^{3+}\)
B. \([V(H_2O)_6]^{3+}\)
C. \([MnCl_4]^{2-}\)
D. \([MnF_6]^{3-}\)
E. \([Cr(H_2O)_6]^{3+}\)
Choose the correct answer from the options given below :

Read the passage carefully and answer the questions
Replacement of a hydrogen atom in a hydrocarbon by an alkoxy or carboxyl group yields a class of compounds known as ethers. Ethers are classified as symmetrical or unsymmetrical on the basis of groups attached to the oxygen atoms. Diethyl ether, a symmetrical ether, has been widely used as an inhalation anesthetic. Ethers can be prepared by acid catalyzed intermolecular dehydration of alcohols and Williamson's synthesis. Acid catalyzed dehydration of alcohols is not generally preferred as it gives a mixture of elimination and substitution products. In Williamson's synthesis, an alkyl halide is allowed to react with sodium alkoxide. Ethers containing substituted Alkyl groups may also be prepared by this method. The C-O bond in ether is weakly polar and is cleaved under drastic conditions with excess of hydrogen halides. In electrophilic substitution, the alkoxy group deactivates the aromatic ring and directs the incoming group to ortho and para positions.
The major product in the reaction of anisole with bromine in ethanoic acid, is :

The correct order of decreasing \(pK _{ a }\) values of the following compounds

The point on the curve \(\frac{x^2}{4}+\frac{y^2}{9}=1\) at which the tangent to the curve is parallel to the \(x\)-aris is

A motorcycle has a scrap value of Rs. 22,500 after 15 years of its purchase.
If the annual depreciation charge is Rs. 8,500, then the original cost by linear method is :

The density of a nucleus of mass number A is proportional to :

Which one of the following plants will have many ovules in their gynoecium?

If a line makes angles \(\alpha, \beta, \gamma\) with the positive directions of \(x\)-axis, \(y\)-axis and \(z\)-axis respectively, then \(\sin ^2 \alpha+\sin ^2 \beta+\sin ^2 \gamma\) is equal to:

It is currently 9:40 AM. What will be the time in next 610 hours?