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Breadth In Chemistry UPDATED Exam Questions and CORRECT Answers
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Breadth In Chemistry UPDATED Exam Questions and CORRECT Answers Which statement about the periodic table is not correct? (a) The elements are arranged in groups with similar chemical properties. (b) The elements are arranged in periods with repeating trends in properties. (c) The elements are...

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  • August 19, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • breadth in chemistry

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Breadth In Chemistry UPDATED Exam
Questions and CORRECT Answers

Which statement about the periodic table is not correct?
(a) The elements are arranged in groups with similar chemical properties.
(b) The elements are arranged in periods with repeating trends in properties.
(c) The elements are arranged in order of increasing atomic number.
(d) The elements in the halogen group increase in reactivity down the group. - CORRECT
ANSWER- d


Which molecule contains the largest bond angle?
(a) C2H4
(b) H2O
(c) NH3
(d) CH4 - CORRECT ANSWER- a


What is the percentage composition by mass of nitrogen in (NH4)2CO3?
(a) 14.58%
(b) 17.95%
(c) 29.17%
(d) 37.50% - CORRECT ANSWER- c


Which chemical process is the most sustainable in terms of atom economy of the organic
product?
(a) CO2 + 3H2 -> CH3OH + H2O
(b) CH3CH2OH + NaCl + H2SO4 -> CH3CH2Cl + NaHSO4 + H2O
(c) CH3CH2Br + NaOH -> CH3CH2OH + NaBr
(d) CH3CH2CH2CH2OH -> CH3CH2CH=CH2 + H2O - CORRECT ANSWER- d

, 8.0 dm3 of NO is mixed with 6.0 dm3 of O2 at RTP. The reaction below takes place until one
of the reactants is use up.
2NO(g) + O2(g) -> 2NO2(g)
What is the volume of the mixture at RTP after the reaction has taken place?
(a) 8.0 dm3
(b) 10.0 dm3
(c) 12.0 dm3
(c) 14.0 dm3 - CORRECT ANSWER- b


What is the volume of 0.0100 mol of N2 at 350C and 200kPa?
(a) 145 cm3
(b) 259 cm3
(c) 145 dm3
(d) 259 dm3 - CORRECT ANSWER- b


0.24g of an element, X, is reacted with 0.0100 mol Cl2 to form a chloride with the formula
XCl2. What is element X?
(a) carbon
(b) magnesium
(c) molybdenum
(d) titanium - CORRECT ANSWER- b


A phosphate(V) ion has the formula P04^3-.
What is the formul for copper(I) phosphate(V)?
(a) Cu(PO4)5
(b) Cu5PO4
(c) Cu(PO4)3
(d) Cu3PO4 - CORRECT ANSWER- d


Which reaction shows chlorine only being oxidised?
(a) Cl2 + H2O -> HCl + HClO

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