​Chemistry Topics

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A All Acid Bases And Indicators Acids Bases And Salts Air And Combustion Alkaline C Carbon And Its Compounds Chemical Families Chlorine And Its Compounds E Electric Current On Substance Electrochemistry I And Ii Energy Changes In Chemical And Physical Processes F Form 1 Level Form 2 Form 3 Form 4 G Gas Laws I Introduction To Chemistry K Kcse-1995 Kcse-1996 Kcse-1997 Kcse-1998 Kcse 1999 Kcse-2000 Kcse-2001 Kcse-2002 Kcse-2003 Kcse-2004 Kcse2005 Kcse-2005 Kcse-2006 Kcse2007 Kcse-2007 Kcse-2008 Kcse-2009 Kcse-2010 Kcse-2011 Kcse-2012 Kcse-2013 Kcse-2014 KCSE 2015 KCSE 2016 KCSE 2017 KCSE 2018 Kcse 2019 M Metals N Nitrogen And Its Compounds O Organic Chemistry I Organic Chemistry II P Paper 1 Paper 2 Periodictable Properties-and-trends-across-the-period R Radioactivity ​Reaction Rates And Reversible Reactions S Salts Simple Classification Of Substances Structure Of The Atom And The Periodic Table Structures And Bonding Sulphur And Its Compounds T The Mole W Water And Hydrogen

Use the flow chart above to answer the questions that follow

​​a) Name the following;

​i) Gas L (1mk)

​ii) Gas H (1mk)

​iii) K (1mk)

​​b) Name the processes involved in the following steps

​i) Step I (1mk)

​ii) Step II (1mk)

​​iii) Step III (1mk)

​c) Draw the structure of compound E (1mk)

​d) Write a chemical equation for the complete combustion of substance F (1mk)

​e) Name the condition and reagents in step III 

​i) Condition (1mk)

​ii) Reagent (1mk)

​f) Calculate the mass of salt Q that would be formed by using 21.9kg of G when it reacts with excess sodium hydroxide (2mks)
(C = 120, H = 1.0, Na = 23.0, O = 16.0)

​g) i) Draw the structure of polymer D (1mk)

​ii) State one use of the above polymer (1mk)

a) Give a reason why ethanoic acid has a higher boiling point than ethanol which has the same number of Carbon atoms (1mk)

​b) Draw the structural formula of ethanoic acid (1mk)

The following diagram represents a charcoal burner. Study it and answer the questions that follow

​Write the equations for the reaction at; (3mks)

A

B

C

When a certain hydrocarbon burnt completely in excess oxygen 5.28g of Carbon (IV) oxide and 2.16g of water were formed. If the molecular mass of the hydrocarbon is 84, determine the molecular formula of the hydrocarbon ​

Using dots (•) and cross (x) show the formation of Carbon (II) oxide gas (1mk)

Name two types of bonds present in the molecule in ‘a’ above (2mks)