g11 chem test

in #msp6 years ago

electronic structures
(ii) positions in the periodic table
(iii) types of electrons and
(iv) type of bond that is formed between A and B.
(d) Write equations in words and symbols for the following reactions.
(i) Dinitrogen oxide reacts with carbon.
(ii) Concentrated nitric acid reacts with magnesium.

(g) (i) State ‘Le Chatelier’s principle’.
(ii) Using Le Chatelier’s principle, predict the effect of increasing pressure on the following equilibrium.
N2(g) + 3H2(g) ⇋ 2NH3(g)
(h) (i) Describe the elements required by plants.
(ii) Give the monomer structure and uses of PS.

  1. Answer any FOUR questions. (32 marks)
    (a) (i) Define buffer solution.
    (ii) Calculate the pOH of a buffer solution containing 0.2 mole of ethanoic acid (pKa=3.8) and 0.05 mole
    of sodium ethanoate per 200 cm3 of solution.
    (b) (i) Define the electrical energy and the mechanical energy.
    (ii) Calculate the heat of combustion of butane gas (C4H10) if its heat of formation is -124 kJ mol-1.The
    Heats of formation of CO2 (g) and H2O(l) are -395 kJ mol-1 and -287 kJ mol-1, respectively.
    (c) Write down the complete equations of the following equations.
    (i) CH3-CH2-COONa + NaOH → ?

        (ii) CH3-CH2-OH          H2SO4(conc)      ?            
    
        (iii) CH3-CH2-OH         Al2O3         ?
    
        (iv) CH3-CH2-Cl   + KOH       ethanol        ?
    

    (d) (i)What happens when ozonized oxygen

Sort:  

This post has received a 30.44% upvote from @lovejuice thanks to @airron. They love you, so does Aggroed. Please be sure to vote for Witnesses at https://steemit.com/~witnesses.

Congratulations @nizaw509! You have completed the following achievement on Steemit and have been rewarded with new badge(s) :

Award for the number of upvotes

Click on the badge to view your Board of Honor.
If you no longer want to receive notifications, reply to this comment with the word STOP

Do you like SteemitBoard's project? Then Vote for its witness and get one more award!

Congratulations @nizaw509! You received a personal award!

Happy Birthday! - You are on the Steem blockchain for 1 year!

You can view your badges on your Steem Board and compare to others on the Steem Ranking

Vote for @Steemitboard as a witness to get one more award and increased upvotes!