Practice Questions CBSE - Science Class 10 (2023 Boards)

Question 1 You are here

Question 2

Question 3 Important

Question 4 Important

Question 5 Important

Question 6

Question 7 Important

Question 8

Question 9 Important

Question 10

Question 11

Question 12 Important

Question 13 Important

Question 14

Question 15 Important

Question 16

Question 17 [Assertion Reasoning] Important

Question 18 [Assertion Reasoning] Important

Question 19 [Assertion Reasoning] Important

Question 20 [Assertion Reasoning]

Question 21 (Choice 1) Important

Question 21 (Choice 2)

Question 22 Important

Question 23

Question 24 Important

Question 25 (Choice 1)

Question 25 (Choice 2)

Question 26 Important

Question 27

Question 28 Important

Question 29 (Choice 1)

Question 29 (Choice 2) Important

Question 30 Important

Question 31 (a)

Question 31 (b) Important

Question 32 (Choice 1)

Question 32 (Choice 2) Important

Question 33 (a)

Question 33 (b)

Question 33 (c) Important

Question 34 (a) - Choice 1

Question 34 (b) - Choice 1 Important

Question 34 (c) - Choice 1

Question 34 (a) - Choice 2 Important

Question 34 (b) - Choice 2]

Question 34 (c) - Choice 2 Important

Question 35 (a) - Choice 1 Important

Question 35 (b) - Choice 1 Important

Question 35 (c) - Choice 1

Question 35 (a) - Choice 2

Question 35 (b) - Choice 2 Important

Question 35 (c) - Choice 2

Question 36 Important

Question 37 (a) - Choice 1 [Case Based]

Question 37 (b) i - Choice 2 [Case Based] Important

Question 37 (b) ii - Choice 2 [Case Based] Important

Question 38 (a) - Choice 1 [Case Based]

Question 38 (b) - Choice 1 [Case Based] Important

Question 38 (c) - Choice 1 [Case Based]

Question 39 (a) - Choice 1 [Case Based] Important

Question 39 (b) - Choice 1 [Case Based]

Question 39 (c) - Choice 1 [Case Based]

Question 39 (d) - Choice 1 [Case Based] Important

Question 39 (d) - Choice 2 [Case Based] Important

The yellow colour of turmeric changes to red on addition of soap solution. When substance P is added to turmeric, there is no change in colour. Which of the following is definitely true about substance P?

A. P is an acid.

B. P is not a salt.

C. P is not a base.

D. P is a neutral substance. 

 

Answer:

Turmeric is a natural indicator

  • It changes its colour to red when a base is added.
  • It does not indicate any change in colour when an acid , neutral substance or salt is added to it.

Turmeric-Teachoo.jpg

Therefore, the correct answer is, C .

Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class

Ask a doubt
Maninder Singh's photo - Co-founder, Teachoo

Made by

Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo