4th Form Chemistry Queries

п»ї4th contact form Chemistry set of questions
1 . All the following structures show the same molecule, other than one. Which usually structure is unique? H H H H
A) H -- C -- C -- C --- C -- They would B) CH3 CH2 CH2 CH3 L H L H
They would
H -- C -- H CH3 C) H L D) H3 C --- C --- CH3 H C C C They would H They would H They would
2 . Which one of the following hydrocarbons will certainly decolorize acidified potassium manganate (VII) answer? A) CH4 B) C3 H6 C) C4 H10 D) HANDSET H12 several. Which set of terms appropriately describes the response between ethane and water? I Hydrogenation II hydration III addition IV replacement 4. A substance using a pleasant smell that undergoes hydrolysis to form an liquor as one of the goods is likely to be: a) sodium ethanoate b) ethanoic acid c) ethanol d) butyl ethanoate 5. The proper name for the element with the subsequent structural formulation is: They would H To H H H-- C -- C -- C --- To -- C -- C -- L ethyl propanoate H H H H 6. The formula of ethanoic acid (C2 H4 O2) shows 4 hydrogen atoms, but it is actually a monobasic acid. This means that it: AВ monobasic acidВ is an acid solution that has merely one hydrogen ion to give to a base in an acid-base reaction.
7. Soil – less lifestyle is known as: hydroponics
8. The use of living creatures to control unwanted pests is called: biological control
being unfaithful. Silicates combined with other materials including feldspar and quartz will be known as: ceramics/glass
10. Man made fiber and wool are samples of what type of fibres? Animal fibers
11. The active ingredient in many brands of the oven cleaners is usually: sodium hydroxide
12. It is used in both toothpaste and normal water to prevent dental decay. flouride
13. The four methods of solid waste disposal are: dropping, incineration, hygienic landfills and recycling
14. The industrial name of CFCs is usually: freon
15. Mention the kinds of food preservative methods and their purpose:
Drying out: В
Abnormally cold: В
Canning and bottling: В
Cleaner Treatment: В
Sugaring: В
Salting: В
Pickling: В
18. Bacteria that want free o2 for their progress are known as: aerobes
17. Tenderizing might be achieved by: preparing food, mechanical action and enzyme action
18. The real bringing up agent in bread – making is: carbon dioxide
nineteen. Mention five pollutants inside the environment:
Sulphur dioxide, nitrogen dioxide, carbon monoxide, Chlorofluorocarbons, carbon dioxide
20. Which from the following take part in some way for making nitrogen accessible to plants? We. The Estar presente Process
2. The Contact Process
III. Denitrifying bacterias
IV. Super storms
twenty-one. The changes which occur in the carbon cycle involve two main biochemical processes referred to as: photosynthesis and respiration
22. In the lab, how might you test to get the presence of carbon dioxide, hydrogen or oxygen? CARBON DIOXIDE – lime water becomes milky
H – provides a pop
O – relighted splint
23. Which in turn pair of terms correctly identifies the reaction among ethane and water? I actually. Hydrogenation
2. Hydration
III. Addition
4. Substitution
24. Which from the following applies for ALL users of a homologous series? I) They have the same molecular formula
II) They may have identical physical properties
III) They have the same functional group
IV) They may have similar substance properties
25. An organic, Times, reacts with chlorine gas to give two products. Which of these claims is true?
a. X is usually an...
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