Jamb 2022 Chemistry Past Questions And Answers
When heat is absorbed during a chemical reaction, the reaction is said to be
- A. thermodynamic
- B. exothermic
- C. isothermal
- D. endothermic
What volume of (dm3) of water will be added to 10dm3 of 2.0 mol/dm3 HCL acid solution to give a final solution of 0.5 mol/dm3?
- A. 30
- B. 40
- C. 20
- D. 50
Which of the following best represent solid gas mixture?
- A. milk
- B. kerosene
- C. soil
- D. smoke
How many bonding pair are present in carbon(iv)oxide?
- A. 4
- B. 3
- C. 2
- D. 1
How many neutrons are present in atom with mass number and atomic number 37 and 17 respectively?
- A. 18
- B. 20
- C. 37
- D. 17
H+ + OH- → H2O
The equation above illustrates
- A. precipitation
- B. hydration
- C. hydrolysis
- D. neutralization
The IUPAC nomenclature of the structure is?
- A. 3-chloro-3-methylbutane
- B. 2,2,-dichloro-3-methylbutane
- C. 3-methylchlorobutane
- D. 2-chloro-2-methylbutane
Wrought iron is obtained by heating cast iron in a furnace with?
- A. magnetite
- B. haematite
- C. carbon(ii)oxide
- D. calcium trioxosilicate(iv)
In which of the following will hydrogen form ionic compound?
- A. HCL
- B. NaH
- C. NH3
- D. CH4
| GAS | CO\(_2\) | N\(_2\) | O\(_2\) |
| % BY VOLUME | 4 | 72 | 24 |
The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?
- A. CO\(_2\) and O\(_2\)
- B. N\(_2\) and CO\(_2\)
- C. CO\(_2\), O\(_2\) and N\(_2\)
- D. O\(_2\) and N\(_2\)