Chemistry Past Questions And Answers
Hydrogen bonding is encountered in two different forms
- A) Intermolecular
- B) Intermolecular and interdiatonic
- C) intermolecular and interatonic
- D) Intermolecular and intramolecular
Petrochemistry is an example of
- A. applied chemistry
- B. Biochemistry
- C. Pure chemistry
- D. Environmental chemistry
An atom of an element X gains two electrons. The symbol of the ion formed is
- A. X+
- B. X2+
- C. X2-
- D. X-
The enzyme that converts glucose to ethyl alcohol is?
- A. maltase
- B. zymase
- C. Diatase
- D. Invertase
The pair of compounds that belongs to the same homologous series is
- A. \(C_2H_6\) and \(C_4H_{10}\)
- B. \(C_3H_8\) and \(C_3H_6\)
- C. \(C_2H_4\) and \(C_4H_{10}\)
- D. \(C_4H_{10}\) and \(C_5H_{10}\)
A metal M forms two types of chlorine, MCl2 and MCl3 which of the following laws best explains the relationship between the chlorides? Law of
- A. conservation of mass
- B. definite proportion
- C. multiple proportion
- D. reciprocal proportion
The formula of the compound formed between a trivalent metal, M and a divalent non-metal, Y is
- A. M2Y3
- B. M3Y2
- C. MY
- D. M3Y
One of the following is not a physical property of monosaccharides?
- A. Monosaccharides get charred when heated
- B. Monosaccharides are water-soluble, sweet substances
- C. They are highly vital to the exploration of metals
- D. They can be reduced to sugar alcohols
MO and X2O represent the formula of oxides of elements M and X respectively . If M and X should combine to form a separate compound, what would be the formula of the compound?
- A. MX2
- B. M2X
- C. MX
- D. MX3
The condition required for corrosion to take place is the presence of
- A) water and carbon (IV) oxide
- B) water, carbon (IV) oxide and oxygen
- C) oxygen and carbon (IV) oxide
- D) water and oxygen