Chemistry

Oxidation of toluene to benzaldehyde can be easily carried out with which of the following

The correct order of nucleophilicity is

The measured BOD values for four different water sample (A-D) are as follows

A = 3 ppm;                                      B = 18 ppm:                      C = 21 ppm;        D = 4 ppm.

The water samples which can be called as highly polluted with organic wastes, are

${\left(C_7{H}_5{O}_2\right)}_2\stackrel{hv}{\to }\left[X\right]\to 2{\stackrel{•}{C}}_6{H}_5+2C{O}_2$

Consider the above reaction and identify the intermediate 'X'

The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?

Which one of the following is an example of disproportionation reaction?

The oxide which contains an odd electron at the nitrogen atom is

Given below are two statements:

Statement I: In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.

Statement II: If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to given NaCN and Na₂S.

In the light of the above statements, choose the most appropriate answer from the option given below

s-block element which cannot be qualitatively confirmed by the flame test is

Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to