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1
answer
Carbon (IV) sublimes at -78ºC. It is called dry ice
asked
Aug 5, 2021
in
Chemistry Form 2
carbon and its compounds
0
votes
1
answer
State two situations where redox reactions are applied in industry
asked
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
1
answer
Observe the equation below
asked
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
1
answer
State two similarities between rusting and combustion
asked
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
1
answer
Moist iron wool was inverted over water. The set up was left to stand for 2 days
asked
Aug 5, 2021
in
Chemistry Form 1
water and hydrogen
0
votes
1
answer
The table below shows some properties and electronic arrangements of common ions of elements represented by letters P to X. Study the information in the table and answer the questions that follow
asked
Aug 5, 2021
in
Chemistry Form 1
structure of the atom and the periodic table
0
votes
1
answer
In an experiment, a test-tube full of chlorine water was inverted in chlorine water as shown in the diagram below and the set up left in sunlight for one day.
asked
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
1
answer
The curve below represents the variation of temperature with time when pure and impure samples of a solid were heated separately.
asked
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
1
answer
Samples of urine from three participants F, G and H at an international sports meeting were spotted onto a chromatography paper alongside two from illegal drugs A1 and A2. A chromatogram was run using methanol. The figure below shows the chromatogram.
asked
Aug 5, 2021
in
Chemistry Form 1
acids bases and indicators
0
votes
1
answer
State two uses of hydrogen gas
asked
Aug 5, 2021
in
Chemistry Form 1
water and hydrogen
0
votes
1
answer
Hydrogen gas was prepared in the lab. Using the following set up
asked
Aug 5, 2021
in
Chemistry Form 1
water and hydrogen
0
votes
1
answer
Define the following terms: Electron affinity
asked
Aug 5, 2021
in
Chemistry Form 2
structure and bonding
0
votes
2
answers
Define the following term: Ionization energy
asked
Aug 5, 2021
in
Chemistry Form 2
structure and bonding
0
votes
1
answer
Define the following term: Isotope
asked
Aug 5, 2021
in
Chemistry Form 2
chemical families patterns in properties
0
votes
1
answer
Give four reasons why most apparatus are made of glass
asked
Aug 5, 2021
in
Chemistry Form 1
introduction
lab apparatus
0
votes
1
answer
Identify the following apparatus and give a use for each
asked
Aug 5, 2021
in
Chemistry Form 1
introduction
0
votes
1
answer
Define the following: Ion
asked
Aug 5, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
1
answer
Define the following:
asked
Aug 5, 2021
in
Chemistry Form 1
introduction
0
votes
1
answer
Tumia herufi mwafaka kuainisha maneno katika sentensi hii.
asked
Aug 4, 2021
in
Sarufi na Matumizi ya Lugha
uakifishaji
0
votes
4
answers
Sahihisha sentensi
asked
Aug 4, 2021
in
Sarufi na Matumizi ya Lugha
uashihishaji
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