How many protons, neutrons and electrons respectively are present in the element 60/27 Co?

• A) 27, 33 and 33
• B) 33, 27 and 27
• C) 27, 33, and 27
• D) 60, 33 and 60

Which of the following is a general method of preparing acids?

• A) Direct combination of constituent elements
• B) Double decomposition involving a salt solution
• C) Reaction between an anhydride and water
• D) Reaction between a base and an amphoteric oxide

The name of CH₃-OCOC₂H₅ is

• A) methoxyethane
• B) methyl propanoate
• C) ethyl ethanoate
• D) propyl methanoate

When KOH is used instead of NaOH in the production of soap, it has the following advantages except it gives:

• A) softer soap
• B) harder soap
• C) soap with lower melting point
• D) more soluble soap

Which of the following substances is not a salt?

• A) Aluminium oxide
• B) Sodium hydrogentrioxosulphate (V)
• C) Sodium trioxocarbonate (V)
• D) Zinc chloride

The number of isomers that can be obtained from 04R0 is

• A) 3
• B) 4
• C) 1
• D) 2

One of the major uses of alkane is

• A) as domestic and industrial fuel
• B) in the hydrogenation of oils
• C) in the textile industries
• D) in the production of plastics

An element has an atomic number of 8 and a mass number of 16. How many neutrons does this element have?

• A. 24
• B. 16
• C. 8
• D. 32

The following statements about graphite are correct except that it

• A. is used as a lubricant
• B. has a network structure
• C. contains mobile free electrons
• D. is good conductor

Which of the following is an example of a primary cell?

• A. Alkaline battery
• B. Fuel cell
• C. Lead-acid battery
• D. Lithium-ion battery