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...