(a) The diagram below shows the process used to obtain Sulphur from underground deposits

 i) Name the above process used to obtain sulphur from the underground deposits     (1mk)

ii) Name the substance passed through pipe

A                       (1mk)

.................................................................................................

B                         (1mk)

.................................................................................................

 iii) State two properties of Sulphur that makes it possible to extract using the above process          (2mks)

b) The diagram below shows the contact process used in the manufacture of concentrated sulphuric(vi) acid

i) Identify the following:

a) Substance Q formed in the burner       (1mk)

.................................................................................................

b) Chamber T                  (1mk)

.................................................................................................

c) Substance R                   (1mk)

.................................................................................................

d) Substance S                            (1mk)

.................................................................................................

ii) Write the chemical equation occurring in the dilution chamber          (1mk)

iii) Why is it necessary to pass substance Q though a purifier       (1mk)

iv) State one use of sulphuric (VI) acid (1mk)

(a) The diagram below shows the process used to obtain Sulphur from underground deposits

 i) Name the above process used to obtain sulphur from the underground deposits     (1mk)

ii) Name the substance passed through pipe

A                       (1mk)

.................................................................................................

B                         (1mk)

.................................................................................................

 iii) State two properties of Sulphur that makes it possible to extract using the above process          (2mks)

b) The diagram below shows the contact process used in the manufacture of concentrated sulphuric(vi) acid

i) Identify the following:

a) Substance Q formed in the burner       (1mk)

.................................................................................................

b) Chamber T                  (1mk)

.................................................................................................

c) Substance R                   (1mk)

.................................................................................................

d) Substance S                            (1mk)

.................................................................................................

ii) Write the chemical equation occurring in the dilution chamber          (1mk)

iii) Why is it necessary to pass substance Q though a purifier       (1mk)

iv) State one use of sulphuric (VI) acid (1mk)

(a) Name two apparatuses that can be used for determining mass in a laboratory     (2mks)

(b) One of the flames produced by Bunsen burner is the luminous flame

 i) Explain why this flame is very bright         (1mk )

ii) State two disadvantages of the luminous flame       (2mks)

(c) Air is usually one of the substances that is considered as a mixture

 (i) Identify the two most abundant component of air          (2mks )

(ii) Give two reasons why the air is considered as a mixture        (2mks)

(iii) One of the components of air is carbon (iv) oxide. Describe an experiment that can be used to prove the presence of carbon (iv) oxide in the air        (2mks)

(a) name the following compounds (3mks)

 (i) CH₃CH₂CH₂COOH

.....................................................................................................

 (ii)

.....................................................................................................

(iii) CH₃CH₂OOCCH₂CH₃

.....................................................................................................

b) Two types of detergents P and Q can be represented as

(i) Identify each type of the detergent                (2mks)

P.....................................................................................................

Q.....................................................................................................

(ii) Which of the two detergents is the best to use with hard water? Give a reason       (2mks)

(iii) State one advantage of detergent P              (1mk)

 (iv) State one disadvantage of detergent Q       (1mk)

(c) An hydrocarbon can be represented as follows

 (i) Identify the hydrocarbon        (1mk)

 (ii) Name two reagents that can reacted together to generate the hydrocarbon (2mks)

The grid below shows a section of the periodic table, the letters are not the actual chemical symbol.

a) Name the family into which element P belongs to                   ( 1mk)

b) Which two elements forms the most soluble carbonates                     (2mks )

c) With a reason, identify elements in period 3 with the largest atomic radius         (2mks )

d) Write the formula of the compound formed between Q and M             (1mk )

e) State two uses of element R and for each use , state property of element R that makes lts possible for the use

(i) Use           ( 1mk)

......................................................................................................................

Property           (1mk)

......................................................................................................................

(ii) Use             (1mk)

......................................................................................................................

Property          (1mk)

......................................................................................................................

f) Using dots (.) and cross (x) ,show bonding in the compound formed between R and oxygen      (2mks )

g) In terms of structure and bonding explain why the oxides of element T has relatively low boiling points      (2mks)

The electron configuration of elements A, B, C, D and E are as given below

(a) Which element has the highest electrical conductivity           (1mk)

(b) Which letter represents the most reactive metal                   (1mk)

(c) Which letter represents the most reactive non-metal (1mk)

A given mass of gas T diffuses through a porous plug in 48 seconds while a similar mass of gas R diffuse in 70 seconds. Given that the density of gas T is 0.6g/cm³, find the density of gas R (2mks)

Describe an experiment that can be used to determine whether a given sample of a liquid is pure (2mks)

Element W has two isotopes W - 36 and W - 40 which occur in the ratio X:4. Given that R.A.M of W is 37.25, find the value of X                          (2mks)

Gas X and Y can be collected as shown below

(a) Name the method used to collect gas Y                     (1mk)

(b) How do densities of gas X and gas Y compare?                (1mk)

(c) Give an example of a gas that can be collected using the same method as gas Y     (1mk)