ENTRANCE EXAM MEDICINE_Chem_Diagnostic Test

What particles are found in the nucleus of an atom?

• proton, electron
• electron, neutron
• neutron, proton
• only proton

What is a chemical bond formed by electrostatic attraction of positive and negative ions?

• metallic bond
• ionic bond
• hydrogen bond
• covalent bond

Which of the following compounds contains a covalent bond ?

• HCl
• NaCl
• CaO
• KBr

Name the compound CaO

• calcium oxide
• calcium dioxide
• calcium oxygen
• calcium dioxygen

In which reaction a precipitate is formed?

• Magnesium sulfate and potassium bromide are dissolved in water.
• Solutions of sodium bromide and calcium nitrate are mixed.
• Solutions of potassium chloride and calcium nitrate are mixed.
• Magnesium sulfate and potassium carbonate are dissolved in water.

In the following reaction, which is an oxidising agent? C + O2 --> CO2

• C
• CO2
• O2
• Not at all

Which of the following would be a polar molecule?

• CO2
• H2O
• O2
• HCl

If you mix 0.10 mol of NaOH and 0.10 mol of HCl in a bucket of water, you would expect the resulting solution to be

• very basic
• neutral
• slightly basic
• slightly acidic

Which of the following salts would produce the most basic aqueous solution?

• LiI
• KCl
• Ca(NO3)2
• Na2CO3

According to IUPAC rules, what is the name of each of the following compound?

• 2,2-dimethylpentane
• 2,3-dimethylpentane
• 2-methylpentane
• 2,2-dimethylbutane