Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 9 Answered

What do you observe when Lead Nitrate crystals are strongly heated Name the gas evolved when nitrogen combines with hydrogen Write a balanced chemical equation for addition of zinc to sodium hydroxide solution Name the industrial method for preparation of hydrogen gas and name the catalyst used in above process Distinguish between the following pairs of substances on the basis of chemical tests given in the brackets.                 : sodium chloride and potassium.                 chloride(flame test)            : zinc carbonate and lead                              carbonate(dry heatingg           6. Calculate the volume of gas X                  at  STP if it occupies 380 litres.                    at 300 Kelvin and 70 cm of.                        Mercury             7.  A gas occupies 17 at 27 degree Celsius what volume will it occupy at 273 degree Celsius pressure remaining constant. 8. Calculate the relative molecular mass of each of the following (1.) ammonium dichromate (2.) hydrated copper sulphate 9. Calculate the percentage of Nitrogen in Ammonium Nitrate      
Asked by Kanwaranita10 | 03 Feb, 2019, 09:05: AM
answered-by-expert Expert Answer
1. What do you observe when Lead Nitrate crystals are strongly heated
 
 
   Lead nitrate decomposes on heating leaving a yellow residue lead monoxide, brown gas nitrogen dioxide and colourless gas oxygen.
 

    2 Pb open parentheses NO subscript 3 close parentheses subscript 2 space space space space rightwards arrow with increment on top space space 2 PbO space space space plus space 4 NO subscript 2 subscript open parentheses straight g close parentheses end subscript end subscript space space plus space space straight O subscript 2 subscript open parentheses straight g close parentheses end subscript space
 
2. Name the gas evolved when nitrogen combines with hydrogen
 
    Ammonia gas is formed when nitrogen combines with hydrogen
 
    straight N subscript 2 subscript open parentheses straight g close parentheses end subscript end subscript space space plus space space 3 straight H subscript 2 subscript open parentheses straight g close parentheses end subscript end subscript space space rightwards arrow space 2 NH subscript 3 subscript open parentheses straight g close parentheses end subscript end subscript space
 
3. Write a balanced chemical equation for the addition of zinc to a sodium hydroxide solution
 
     When sodium hydroxide solution is heated with zinc, then the sodium zincate is formed and hydrogen gas is evolved.
 
       Zn subscript open parentheses straight s close parentheses end subscript space space plus space space 2 NaOH subscript open parentheses aq close parentheses end subscript space rightwards arrow with increment on top space Na subscript 2 space ZnO subscript 2 subscript open parentheses aq close parentheses end subscript end subscript space space space plus straight H subscript 2 subscript open parentheses straight g close parentheses end subscript end subscript space
 
 
4. Name the industrial method for preparation of hydrogen gas and name the catalyst used in the process
 
    Bosch process is used for the preparation of hydrogen gas.
    The catalysts used in the process is ferric oxide(Fe2O3).
 
 
 
Answered by Varsha | 04 Feb, 2019, 11:11: AM
ICSE 9 - Chemistry
Asked by siddheshmathur | 12 Jul, 2022, 01:14: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by Angadneb | 22 Apr, 2022, 05:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by jailakshmitradersdnn | 04 Mar, 2021, 12:00: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by swarnatottaramudi | 21 Aug, 2020, 10:34: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by bhoomikapoor200 | 16 May, 2020, 10:31: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by sayantikasingh3318.9sdatl | 15 May, 2020, 08:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 9 - Chemistry
Asked by bharatshamnani5619.9sdatl | 03 May, 2020, 07:06: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×