Tiwari Academy Discussion

Asked: June 19, 2021In: Class 10 Science

(a) The pH of soil Ais7.5 while that of soil B is 4.5. Which of the two soils A or B should be treated with powdered chalk to adjust its pH and why? (b) Name the chemical which is injected into the skin of a person: (i) During an ant’s sting. (ii) During the nettle leaf sting. How can the effect of these stings be neutralised? (c) Explain how the pH change in the river water can endanger the lives of aquatic animals like fish?

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 10 Science

(a) State three common features of respiratory organs of animals. (b) Write two points of difference between aerobic respiration and anaerobic respiration.

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.

Poll

Aaral shah

Asked: June 19, 2021In: Class 10 Science

The first colour on the colour chart of pH ship from the top is :

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 10 Science

A student took 5 mL of lemon Juice in each of test tubes A, B and C. She added 5 mL of water in A and 20 mL of water in B. She tested for pH value in all the three tubes. She would find that pH value of liquid :

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 10 Science

We will observe a precipitation to occur when:

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.

Poll

Aaral shah

Asked: June 19, 2021In: Class 10 Science

A few pieces of granulated zinc were added to copper sulphate solution in a test tube. After an hour, the colour of the solution changed from:

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.

Poll

Aaral shah

Asked: June 19, 2021In: Class 10 Science

A wire of resistance R is cut into ten equal parts which are then joined in parallel. The equivalent resistance of the combination

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 10 Science

In the experiment to show that ‘light is necessary for photosynthesis’, the reason for boiling the leaf in alcohol is to:

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 10 Science

Shubham sets up the apparatus to show that CO ₂is evolved during respiration. After 3 hours he would observe:

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.

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