Correct answer
C. 4
Explanation
4 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
List of elements based on hydrogen scale is called________________?
which of the following pair is not distinguished by passing H2S?
Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
When alcohol reacts with phosphorous halides it geive____________________?
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?
Quantum number which tells the energy of electron is________________?