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
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.
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