Which of the following process is responsible for the formation of delta at a place where rivers meet the sea?

Name the following reaction.
\(ArN_2^{+} X^{-} \xrightarrow{Cu / HBr} ArBr+N_2+CuX \)

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.
Which is most reactive hydrogen halide for cleavage of ethers?

In the following reaction, the product A is

Arrange the following compounds in increasing order of their reactivity towards nucleophilic addition reaction:
(A) Ethanal
(B) Propanal
(C) Propanone
(D) Butanone
Choose the correct answer from the options given below:

On doubling the initial concentration, the half life of a reaction becomes half. The order of the reaction is

Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride?

The potential energy of an electron in the first excited state of hydrogen atom is -6.8 eV. The kinetic energy of the electron in its ground state will be :

Increasing order of oxidation states of transition metal oxides will be :
(A) \(\text{TiO}_2\)
(B) \(\text{MnO}_4^-\)
(C) \(\text{VO}_2^+\)
(D) \(\text{CrO}_4^{2-}\)
(E) \(\text{Ni(CO)}_4\)
Choose the \textbf{correct} answer from the options given below :

For real numbers x and y, the relation R is defined as R = {(x, y) : x + y - \(\pi\) is an irrational number}, then the relation R is:

For \(x>1, \int \frac{e^{7 \log x}-e^{5 \log x}}{e^{5 \log x}-e^{4 \log x}} d x\) equals.

The system of equations:
\(x+y+z=5\)
\(x+2 y+3 z=9\)
\(x+3 y+\lambda z=\mu\) has a unique solution, if

Match List - I with List - II.

List - I (Names of Vitamin)	List - II (Deficiency Diseases)
(A) Vitamin A	(I) Night blindness
(B) Vitamin B12	(III) Pernicious anaemia
(C) Vitamin C	(IV) Scurvy
(D) Vitamin D	(II) Rickets

Choose the correct answer from the options given below :