IGCSE O Level Chemistry Practice Test 111

Making and Breaking Bonds Quiz PDF: Questions and Answers - 111

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The Quiz: Overall energy change can be calculated by; "Making & Breaking Bonds" App Download (Android & iOS) Free with answers adding the energy taken in when bonds are broken and the energy given out, when bonds are made, subtracting the energy taken in when bonds are broken from the energy given out, when bonds are made, subtracting the energy given out when bonds are made from the energy taken in, when bonds are broken and multiplying all the enthalpy changes to study online schools courses. Practice energy from chemicals questions and answers, Google eBook to download free sample for ACT practice test.

Making & Breaking Bonds Questions and Answers PDF Download: Quiz 111

MCQ 551: Overall energy change can be calculated by

A) subtracting the energy taken in when bonds are broken from the energy given out, when bonds are made

B) adding the energy taken in when bonds are broken and the energy given out, when bonds are made

C) subtracting the energy given out when bonds are made from the energy taken in, when bonds are broken

D) multiplying all the enthalpy changes

MCQ 552: Ca(OH)₂ indicates that the molecule is formed through

A) two Ca ions and one OH ion

B) One Ca ion and two OH ions

C) three Ca ion and two OH ions

D) four Ca ion and two OH ions

MCQ 553: Digestive fluids in the stomach have a pH of

A) 0

B) 2

C) 4

D) 6

MCQ 554: It cannot be split into simpler substances through chemical processes. It is

A) a matter

B) an element

C) a metal

D) an atom

MCQ 555: In Calcium Hydroxide (Ca(OH)₂), valency of Ca is

A) −1

B) −2

C) +1

D) +2

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