Chemistry Past Questions And Answers
2281
Which of the following is not a characteristics property of ionic compounds?
- A) solubility in polar solvents
- B) low melting points
- C) conduction of electricity in aqueous solution
- D) fast reactions in solution
2282
Which of the following compounds is covalent?
- A. CaCI2
- B. MgO
- C. NaN
- D. CH4
2283
An example of a polysaccharide is?
- A. Dextrose
- B. Mannose
- C. Glucose
- D. Starch
2284
Biotechnology is applied in the?
- A. treatment of sewage
- B. treatment of water
- C. purification of chemicals
- D. purification of metals
2285
When platinum electrodes are used during the electrolysis of copper (ll) tetraoxosulphate (lV) solution, the solution gets progressively?
- A. acidic
- B. basic
- C. neutral
- D. amphoteric
2286
Coal gas is made up of carbon (II) oxide, hydrogen and?
- A. nitrogen
- B. air
- C. argon
- D. methane
2287
The process by which salt and water reacted in a limited way to form an acid or a base is?
- A. Neutral process
- B. Basic acidic process
- C. Hydrolysis
- D. Sublimation
2288
The combining powers of HCO?3; O2?; Na+; Cl? respectively are:
- A) ?2, +1, ?1, +1
- B) ?1, ?2, +1, ?1
- C) +1, ?2, +1, ?1
- D) None of these
2289
Compounds that have the same molecular formular but different structures are said to be
- A) allotropic
- B) polymomnic
- C) polymeric
- D) isomeric
2290
Brass is an alloy of copper and
- A. iron
- B. chromium
- C. zinc
- D. tin