Chemistry important Questions Part - 1
Thursday, 31 January 2019
Graphite
2. Which element that does not occur in nature but can be produced artificially?
Plutonium
3. Which rocks is transformed into marble?
Limestone
4. By which number the quality of gasoline’ sample is determined?
By its octane number
5. What is the principal reason for the formation of metamorphic rocks?
Extreme heat and pressure
6. Which type of glass is used for making glass reinforced plastic?
Quartz glass
7. When temperature is gradually decreased, what is the specific heat of substance?
Decreased
8. Which metal is non toxic in nature?
Gold
9. Which is the element that has the highest first ionization potential?
Nitrogen
10. Which transition metal is in liquid state?
Mercury
11. Temporary hardness of water is due to the presence of which thing?
Magnesium bicarbonate
12. Which air pollutant affect the nervous system of man?
Lead
13. Which oxyacid of halogen has maximum acidic nature?
HClO4
14. What is the characteristic odour of garlic?
A sulphur compound
15. What can be the maximum duration of totality for a solar eclipse?
7 minutes 40 seconds
16. Which of the following is good nuclear fuel?
Plutonium-239
17. Which is the essential element in all organic compounds?
Carbon
18. Salts of which element provide colours to fireworks?
Strontium and Barium
19. Leukaemia or blood cancer is characterised by abnormal increase of which cells?
White blood cells
20. What does Oxidation involve?
Loss of electrons
21. In colourful diamond, Why are different colours present?
Due to impurities
22. What is the number of unpaired electrons in carbon atom?
2
23. When some detergent is added to water, what will be the surface tension?
Increases
24. What is reduction of oxide with carbon at high temperature called?
Smelting
25. Conversion of chemical energy into electrical energy occurs in which thing?
Battery
26. Purification of petroleum is carried out by which method?
Fractional distillation
27. Which petroleum refinery product has the lowest boiling point?
Gasoline
28. Which is purest form of iron?
Wrought iron
29. Which is used as a coolant in nuclear reactors?
Liquid sodium
30. What does M3 include?
M1 + T.D