If a reaction takes 50 seconds at 25 ℃, then at 50 ℃ the time for the reaction in seconds is likely to be about:
2. Question | Physics
The air temperature on a particular day is 27 ℃. An air bubble trapped in a tube by a thread of
liquid is able to expand freely if it is heated.At what temperature would you expect the volume
of the air bubble to double?
3. Question | Principles Of Accounts
The balances listed below appear in a trader's trial balance. The item that is to be included in the Profit and Loss Account is
4. Question | Biology
Which one of the following is the best way to measure growth of an organism?
5. Question | Chemistry
Potassium reacts quickly with water but we do not use it with acids because:
6. Question | Chemistry
When potassium burns in chlorine, the material that is oxidised is called:
7. Question | Chemistry
When gas particles spread out we call it:
8. Question | Chemistry
When limestone is heated strongly it changes into:
9. Question | Information Technology
Which of the following acronyms represents a computer bus primarily designed for the transfer of data between a computer system and a mass storage device?
10. Question | Integrated Science
Which of the following can cross the placenta from mother to fetus?
11. Question | Chemistry
In an atom the neutron is found:
12. Question | Physics
You look through a microscope to view the Brownian motion of smoke in a container of air.
Which one of the following statements is NOT true?
13. Question | Chemistry
Powders react faster than lumps because they have:
14. Question | Chemistry
Herbicides are used to destroy:
15. Question | Chemistry
Different structures based on the same molecular formula are called:
16. Question | Chemistry
We use expanded polystyrene cups for heat of reaction experiments because the cups are:
17. Question | Chemistry
The charge on a sodium ion is always:
18. Question | Social Studies
Which of the following social issues are associated with the use of illegal drugs by adolescents?
1. Criminal activity
2. Indiscipline
3. Early marriage
4. Poverty
19. Question | Mathematics
Three lights flash at intervals of 4, 6 and 10
seconds respectively. They are started
together. How soon after will they next flash
together again?
20. Question | Social Studies
Healthy individuals are beneficial to a country′s development because such individuals are likely to be