Day 232: CBSE Class 10 Science

5 questions (8 parts). Try each one first, then open its answer.

Question 1
Electricity. Asked once: 2025
25 (a) $(A) State two applications of Joule’s heating in domestic electric circuit. (B) Establish the relationship between the commercial unit of electric energy and the SI unit of electric energy.$
Question 2
How do Organisms Reproduce?. Asked once: 2022
5 (a) $Name the reproductive parts of an angiosperm. Where are these parts located ? Explain the structure of its male reproductive part.$
Question 3
Magnetic Effects of Electric Current. Asked once: 2023
16 $For a current in a long straight solenoid, N and S poles are created at the two ends. Among the following statements, the incorrect statement is :$
Tap an option to check your answer.
Question 4 (case study, 4 parts)
Acids, Bases and Salts. Asked once: 2024
Salts play a very important role in our daily life. Sodium chloride which is known as common salt is used almost in every kitchen. Baking soda is also a salt used in faster cooking as well as in baking industry. The family of salts is classified on the basis of cations and anions present in them.
37 (a) $Identify the acid and base from which Sodium chloride is formed.$
37 (b) $Find the cation and the anion present in Calcium sulphate.$
37 (c) $“Sodium chloride and washing soda both belong to the same family of salts.” Justify this statement.$
37 (c) OR $Define the term pH scale. Name the salt obtained by the reaction of Potassium hydroxide and Sulphuric acid and give the pH value of its aqueous solution.$
Question 5
Carbon and its Compounds. Asked once: 2022
9 (a) $\mathrm{CH_3CH_2CHO}$

Question 1

Question 2

Question 3

Question 4 (case study, 4 parts)

Question 5