Phosphine is prepared from which of the following methods?(a) By reacting calcium phosphide with water or dilute HCl(b) By directly reacting phosphorous with hydrogen(c) By passing dry chlorine over P2H4(d) Heating while phosphorous with halidesI had been asked this question during an internship interview.My question is from P-Block Elements topic in section P-Block Elements of Chemistry – Class 12

Phosphine is prepared from which of the following methods?(a) By react

1.	Phosphine is prepared from which of the following methods?(a) By reacting calcium phosphide with water or dilute HCl(b) By directly reacting phosphorous with hydrogen(c) By passing dry chlorine over P2H4(d) Heating while phosphorous with halidesI had been asked this question during an internship interview.My question is from P-Block Elements topic in section P-Block Elements of Chemistry – Class 12
Answer» The CORRECT choice is (a) By reacting calcium PHOSPHIDE with WATER or dilute HCl To elaborate: Phosphine is prepared by the reaction of calcium phosphide with water or dilute HCl. With water: Ca3P2 + 6H2O → 2PH3 + 3Ca(OH) 2 With dilute HCl: Ca3P2 + 6HCl → 2PH3 + 3CaCl2.

Discussion

No Comment Found

Related InterviewSolutions

Which of the following is the second most abundant noble gas in the atmosphere?(a) Helium(b) Argon(c) Neon(d) KryptonThis question was addressed to me in an interview for job.My question is from P-Block topic in chapter P-Block Elements of Chemistry – Class 12
Which of the following is not an oxoacid of chlorine?(a) HCl(b) HOCl(c) HOClO(d) HOClO2The question was posed to me in semester exam.I want to ask this question from P-Block Elements topic in chapter P-Block Elements of Chemistry – Class 12
Which of the following noble gases do not occur in the elemental state in the atmosphere?(a) Helium(b) Neon(c) Argon(d) RadonI have been asked this question in an internship interview.This is a very interesting question from P-Block in portion P-Block Elements of Chemistry – Class 12
What are the favorable conditions for maximum yield of Sulphur trioxide?(a) High pressure, low temperature, excess of oxygen(b) High pressure, low temperature, less oxygen(c) Low pressure, low temperature, excess of oxygen(d) High pressure, high temperature, excess of oxygenI had been asked this question in exam.I would like to ask this question from P-Block Elements topic in division P-Block Elements of Chemistry – Class 12
Which of the following conditions is the most suitable for manufacture of sulfuric acid in contact process?(a) High temperature and high pressure(b) Low temperature and high pressure(c) High pressure and low temperature(d) Low pressure and low temperatureThe question was asked during a job interview.This intriguing question originated from P-Block Elements topic in portion P-Block Elements of Chemistry – Class 12
Which of the following is a suffocating gas produced during incomplete combustion of fuels?(a) Sulfur dioxide(b) Carbon monoxide(c) Carbon dioxide(d) Nitrogen dioxideI got this question during an online exam.This interesting question is from P-Block Elements topic in chapter P-Block Elements of Chemistry – Class 12
Who first recognized sulfur as an element?(a) John Dalton(b) Humphry Davy(c) Louis Pasteur(d) Antoine LavoisierThis question was addressed to me in homework.Question is taken from P-Block Elements topic in division P-Block Elements of Chemistry – Class 12
Why does aluminum not degrade in nature quickly?(a) It reacts at low temperature(b) It has an octet configuration(c) It has a tough oxide layer(d) It is an electronegative elementI got this question during an online exam.My question comes from P-Block Elements topic in chapter P-Block Elements of Chemistry – Class 12
Which of the following is not poisonous?(a) H2O(b) H2S(c) H2Se(d) H2TeThe question was posed to me during an interview for a job.The query is from P-Block topic in portion P-Block Elements of Chemistry – Class 12
What is the most stable oxidation state of the oxygen atom?(a) +1(b) -1(c) -2(d) +2I have been asked this question during an interview for a job.This question is from P-Block Elements in division P-Block Elements of Chemistry – Class 12

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment