Jamb Chemistry Past Questions For Year 2015
Question 31
The elements that belong to the third period of periodic table are
- A. Li, Be, Al and D
- B. Na, P, O and Cl
- C. B, C, N, and O
- D. Na, Mg, S and Ar
Question 33
A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, Find the molecular formula [H = 1, C = 12, O = 16)
- A. CH2O
- B. C3H6O3
- C. C6H12O6
- D. C6H12O3
Question 34
What volume of 0.5mldm3 H2SO4 will exactly neutralize 20cm3 of 0.1moldm3 NaOH Solution?
- A. 2.0cm3
- B. 5.0cm3
- C. 6.8cm3
- D. 8.3cm3
Question 35
A difference between chemical and physical change is that in a chemical change
- A. oxygen is consumed
- B. heat is supplied
- C. the reversible process occurs
- D. a new substance is formed
