Post Utme Chemistry Questions
Question 206:
When each of the nitrates of potassium, magnesium and iron is heated ____________
- A All the nitrates decompose to their oxides
- B The nitrate of magnesium gives the nitrite and oxygen
- C The nitrates of magnesium and iron give the oxides
- D The nitrate of iron gives the nitrite and oxygen
- E The nitrate of the magnesium is not decomposed
Question 207:
Helium atoms are chemically unreactive because ____________
- A There are no electrons around the nucleus
- B The number of protons equals the number of electrons
- C There are equal number bf protons and neutrons in the nucleus
- D The outer electron shell is completely filled
- E The atoms contain only protons
Question 208:
How many grams of \(HBr\) would exactly be required to react with \(2 g\) of propyne? \(( C =12, H =1, Br =80)
- A 4.1 g\)
- B \(6.1 g\)
- C \(8.1 g\)
- D \(10 . lg\)
- E \(16.2 g\)
Question 209:
Under high pressure, real gases do not obey gas laws because their molecules ____________
- A Have become more energetic
- B Have become less energetic
- C Have become smaller in size
- D Decompose into atoms
- E Start repelling each other
Question 210:
Which of the following statements is an exception in the assumptions of the kinetic theory of gases?
- A Gases are composed of many elastic particles
- B The particles are of negligible size
- C The particles are in constant random motion
- D The particles are of negligible mass
- E The particles collide with each other