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Chemistry Past Questions For JAMB/WAEC/NECO Students v2

Chemistry Past Questions For JAMB/WAEC/NECO Students v2; These Chemistry questions are for students who are sitting for the following examinations:

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  • JAMB
  • Post-UTME / Post-JAMB
  • WAEC
  • NECO
  • WAEC GCE
  • NECO GCE
  • NABTEB
  • NABTEB GCE

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#1. The number of waves in n x 10th Bohr's orbit are

#2. The mass of one Avogadro number of helium atom is

#3. The items amenable to detection by soft x-rays are

#4. The material which can be deformed permanently by heat and pressure is called a

#5. The mass number of a nucleus is

#6. The inexpensive and commonly used variety of glass is called soda glass. It is called so because

#7. The gas used in the manufacture of vanaspati from vegetable oil is

#8. The ionic radii of N3-, O2-, F- and Na+ follows the order

#9. The graphite rods in the nuclear reactor

#10. The first metal used by man was

#11. The hydronium ion is

#12. The most electropositive elements among the following is

#13. The method that cannot be used for removing permanent hardness of water is

#14. The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

#15. The gas used for artificial ripening of green fruit is

#16. Zone refining is used for the purification of

#17. The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

#18. The molecule which has the highest percentage of ionic character among the following is

#19. The high reactivity of fluorine is due to

#20. The iron ore magnetite consists of

#21. The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

#22. The major constituent of air is

#23. The main chemical constituent of clay is

#24. The mineral containing both magnesium and calcium is

#25. The metal does not give H2 on treatment with dilute HCL is

#26. The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

#27. The most extensive, commercially useful source of thorium as monazite sand occurs in India at

#28. The main active constituent of tea and coffee is

#29. The maximum number of isomers for an alkene with molecular formula C4H8 is

#30. The hardest form of carbon is

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Practice other questions here

Practice other Chemistry questions here

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