List of top Science Questions on Carbon and its Compounds asked in CBSE Class X

Mention the gland and the hormone secreted by it in scary situation in human beings.
Give reasons for the following: Ionic compounds have generally high melting points and boiling points.
Give reasons for the following: Ionic compounds have generally high melting points and boiling points.
What happens when ethanol is heated with excess concentrated sulphuric acid at 443 K? Write chemical equation involved. What is the role of concentrated sulphuric acid in this reaction?
Write the chemical equation of reaction of ethanol with ethanoic acid in the presence of concentrated H$_2$SO$_4$. Write the name of this reaction.
Study the following table and select the correct option:
Define germination.
State the changes taking place in the following structures of flower post fertilization: Zygote Ovule Ovary Sepals
Write the structure and function of Bowman’s capsule.