Entrance Guru: Chemistry Model questions and answers part 3

1) The chemical name of phosgene is :

 a) Phosphorus 

 b) Carbonyl chloride

 c) Phosphorus oxychloride

 d) Phosphorus trichloride

2) Basicity of orthophosphoric acid is

 a) 2

 b) 3

 c) 4

 d) 5

3) Cane sugar reacts with conc. HNO3 to give 

 a) CO2 & H2O

 b) Oxalic acid 

 c) Co & H2O

 d) Carbonic acid

4) Which of the following halides is the most acidic?

 a) PCl3

 b) SbCl3

 c) BiCl3

 d) CCl4

5) In which of the following NH3 is not used?

 a) Cold storage

 b) Anaesthetic 

 c) Manufacture of rayon and plastic 

 d) none of these 

    

                                                        Answers

1) b) Carbonyl chloride is known as phosgene 

2) b) orthophosphoric acid, contains three P-oh groups and is therefore ,tribasic

3) b) Sugarcane  on reaction with conc.HNO3 gives oxalic acid 

4) a) PCl3

5) b) NH3 not used as anaesthetic