Class 9 Science

Aaral shah

Asked: June 19, 2021In: Class 9 Science

(a) Given below are the pH values of four different liquids: 7.0, 14.0, 4.0, 2.0 Which of these could be that of (i) lemon juice (ii) distilled water (iii) sodium hydroxide solution (iv) tomato juice? (b) When blue litmus solution is added to soda water, what change will be observed and why?

NCERT Important Questions Class 10 Science CBSE 2022-2023. NCERT Book Extra Questions for Session 2022-2023 CBSE Board and UP Board Others state Board NCERT book extra.

Aaral shah

Asked: June 19, 2021In: Class 9 Science

Write chemical equations for the reactions taking place when: (i) Iron reacts with steam. (ii) Magnesium (Mg) reacts with dil. HCl. (iii) Copper is heated in air.

NCERT Important Questions Class 10 Science CBSE 2022-2023. NCERT Book Extra Questions for Session 2022-2023 CBSE Board and UP Board Others state Board NCERT book extra.

Aaral shah

Asked: June 19, 2021In: Class 9 Science

What is meant by resistance of a conductor? Name and define its SI unit. List the factors on which the resistance of a conductor depends. How is the resistance of a wire affected if: (i) its length is doubled, (ii) its radius is doubled?

NCERT Important Questions Class 10 Science CBSE 2022-2023. NCERT Book Extra Questions for Session 2022-2023 CBSE Board and UP Board Others state Board NCERT book extra.

Harikesh

Asked: June 18, 2021In: Class 9 Science

The following statements, describe the steps to detect the presence of metanil yellow in dal. One of the four statements given below is incorrect

NCERT Important Questions Class 9 Science biology Chapter 15 Important NCERT Extra Questions Chapter 15 Improvement in Food Resources NCERT Book Extra Questions for Session 2022-2023 CBSE Board and UP Board Others state Board

Poll

Harikesh

Asked: June 18, 2021In: Class 9 Science

Aditya added L-2 drops of iodine to three test tubes A, B and C, containing 2 ml of food samples. A dark blue-black colour appeared in test tubes A and B. The correct order of food samples taken in test tubes A, B and C is:

NCERT Important Questions Class 9 Science biology Chapter 15 Important NCERT Extra Questions Chapter 15 Improvement in Food Resources NCERT Book Extra Questions for Session 2022-2023 CBSE Board and UP Board Others state Board

Category: Class 9 Science

(a) Given below are the pH values of four different liquids: 7.0, 14.0, 4.0, 2.0 Which of these could be that of (i) lemon juice (ii) distilled water (iii) sodium hydroxide solution (iv) tomato juice? (b) When blue litmus solution is added to soda water, what change will be observed and why?

Write chemical equations for the reactions taking place when: (i) Iron reacts with steam. (ii) Magnesium (Mg) reacts with dil. HCl. (iii) Copper is heated in air.

What is meant by resistance of a conductor? Name and define its SI unit. List the factors on which the resistance of a conductor depends. How is the resistance of a wire affected if: (i) its length is doubled, (ii) its radius is doubled?

The following statements, describe the steps to detect the presence of metanil yellow in dal. One of the four statements given below is incorrect

Aditya added L-2 drops of iodine to three test tubes A, B and C, containing 2 ml of food samples. A dark blue-black colour appeared in test tubes A and B. The correct order of food samples taken in test tubes A, B and C is:

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