Science
Which of the following equations represent redox reactions and what are the values for ‘p’ and ‘q’ in these equations? - Equation 1 : - Equation 2 : options 1. Only equation 1 is a redox reaction, p = 1 and q = 3 2. Both equations 1 and 2 are redox reactions, p = 2 and q = 4 3. Only equation 2 is a redox reaction, p = 2 and q = 10 4. Both equations 1 and 2 are redox reactions, p = 2 and q = 10
Related Questions
Puneet wanted to grow banana plants.
(a) Based on your knowledge on plant reproduction should he opt for seeds or any alternate method of reproduction. Justify your answer.
(b) Offsprings of a banana plant usually show very little variation. What causes variation and are variations good or bad? Justify.
Annie was conducting research on the number of fruits produced by watermelon under different conditions. She grew 25 watermelon plants each in both glass house A and B. She introduced pollinators in glass house A only.
(a) What difference will she observe in the number of fruits produced in the two glass houses? Explain with reason.
(b) List 3 changes that will occur in a flower once it gets fertilized.
Four statements about the reactions of oxides with dilute hydrochloric acid and aqueous sodium hydroxide are listed.
I. Aluminium oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide.
II. Calcium oxide reacts with dilute hydrochloric acid and aqueous sodium hydroxide.
III. Zinc oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide.
IV. Sulphur dioxide does not react with either dilute hydrochloric acid or aqueous sodium hydroxide.
Which statements are correct?
options
- I and II
- I and III
- II and IV
- III and IV
An iron nail is added to each of the two test tubes ‘P’ and ‘Q’ containing aqueous copper (II) sulphate and aqueous silver nitrate respectively. Which of the following observation is correct?
options
- In test tube ‘P’ iron nail is coated with a blue coating and in test tube ‘Q’ there is no reaction.
- Iron nail is coated with a brown coating in test tube ‘P’ and silver coating in test tube ‘Q’.
- There is no reaction in either of the test tubes ‘P’ or ‘Q’.
- There is no reaction in test tube ‘P’ but a silver coating on iron nail is seen in test tube ‘Q’.