Start learning →

NDA Sound — practice questions

Explore 3 free Sound questions in NDA Science. Open each question or exercise to read its content, reference answers and available explanation.

Practise Sound with Quill →

Sound questions and exercises with answers

Showing questions 1–3 of 3.

Saturated, unsaturated or neither?Read the answer and worked solution →Key in the carbon numberRead the answer and worked solution →True or false: acids and basesRead the answer and worked solution →

Worked practice questions

Saturated, unsaturated or neither?

Read exercise and reference answers
Items
  1. Item
    Methane, CH4
    Category
    Saturated
  2. Item
    Ethane, C2H6
    Category
    Saturated
  3. Item
    Propane, C3H8
    Category
    Saturated
  4. Item
    Ethene, C2H4
    Category
    Unsaturated
  5. Item
    Ethyne, C2H2
    Category
    Unsaturated
  6. Item
    Benzene, C6H6
    Category
    Unsaturated
  7. Item
    Ethanol
    Category
    Not a HC
  8. Item
    Acetic acid
    Category
    Not a HC
Categories
  1. Item
    Saturated
  2. Item
    Unsaturated
  3. Item
    Not a HC
Instructions
Tap a compound, then tap the box it belongs in.
_Source: syllabus Science Ch4 Carbon and its Compounds, 4.1 BONDING IN CARBON_

Open this exercise →

Key in the carbon number

Read exercise and reference answers
Questions
  1. Answer
    6
    Question
    What is the atomic number of carbon?
  2. Answer
    4
    Question
    How many valence electrons does a carbon atom have?
  3. Answer
    10
    Question
    How many hydrogen atoms are in the alkane with 4 carbon atoms?
  4. Answer
    10
    Question
    Using CnH2n, how many hydrogen atoms does the alkene with 5 carbons have?
Instructions
Work out each answer and key it in on the pad.
_Source: syllabus Science Ch4 Carbon and its Compounds, 4.1 BONDING IN CARBON_

Open this exercise →

True or false: acids and bases

Read exercise and reference answers
Questions
  1. Statement is true
    Yes
    Statement
    The pH scale generally runs from 0 to 14.
  2. Statement is true
    No
    Statement
    A higher hydronium ion concentration means a higher pH value.
  3. Statement is true
    Yes
    Statement
    Rain water with pH below 5.6 is called acid rain.
  4. Statement is true
    No
    Statement
    Tooth decay starts when the pH of the mouth rises above 7.
  5. Statement is true
    Yes
    Statement
    Turmeric is a natural indicator.
Instructions
Decide whether each statement about acids and bases is true or false.
_Source: syllabus Science Ch2 Acids Bases and Salts, 2.3 HOW STRONG ARE ACID OR BASE SOLUTIONS_

Open this exercise →

How to practise

  1. Choose a Sound question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Sound practice for NDA. Read explanations as you go. No signup form needed to start.

Practise Sound →

More Science topics

Environmental & Disaster ManagementEffects of Electric CurrentRefraction of Light and LensesScience & TechnologyLife Processes in Living Organisms Part 2Materials: Metals and Non-MetalsChemical Reactions and EquationsAcids, Bases and Salts