12 Questions
Which element has the highest electronegativity?
Fluorine
How many valence electrons does a chlorine (Cl) atom have?
17
Where does photosynthesis primarily take place?
Leaves
What is the function of auxins in plants?
Stem elongation
In sexual reproduction, where do offspring inherit genes from?
Both parents
Which system in the human body is responsible for removing waste products through the kidneys?
Kidneys
Which of the following is an example of a chemical change?
Rusting of iron
The balanced chemical equation for the reaction between sodium hydroxide and hydrochloric acid is:
NaOH + HCl → NaCl + H2O
Which of the following has a pH value less than 7?
Bleach
An example of a metal is:
Mercury
What is the main difference between metals and non-metals?
Metals can conduct electricity, while non-metals cannot.
Diamond is:
An allotrope of carbon
Study Notes
Periodic Table and Chemical Properties
- Fluorine (F) has the highest electronegativity.
- Chlorine (Cl) atom has 7 valence electrons.
Photosynthesis
- Photosynthesis primarily takes place in chloroplasts.
Plant Hormones
- Auxins function to promote cell elongation and cell growth in plants.
Sexual Reproduction
- Offspring inherit genes from parents.
Human Body Systems
- Excretory system is responsible for removing waste products through the kidneys.
Chemical Reactions
- Burning of gasoline is an example of a chemical change.
Chemical Equations
- The balanced chemical equation for the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl) is: NaOH + HCl → NaCl + H₂O.
Acids and Bases
- Substances with a pH value less than 7 are acidic.
Metals and Non-Metals
- An example of a metal is sodium (Na).
- The main difference between metals and non-metals is the ability to conduct electricity.
Carbon Allotropes
- Diamond is an allotrope of carbon that is a non-conductor and extremely hard.
Test your knowledge with 20 multiple-choice questions based on key concepts covered in Chapter 1 - Chemical Reactions and Equations of NCERT Class 10 Science textbook. Questions cover topics such as chemical changes, balanced chemical equations, and more.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
