Science
Identify ‘p’, ‘q’ and ‘r’ in the following balanced reaction
options
- 2, 2, 4
- 2, 4, 2
- 2, 4, 4
- 4, 2, 2
Chemical Reaction
3 Likes
Answer
2, 2, 4
Reason — On heating, lead nitrate () undergoes thermal decomposition, releasing brown fumes of nitrogen dioxide () and colourless oxygen gas (). The solid residue left is yellow lead oxide ().
The balanced chemical equation is :
Here,
- p = 2
- q = 2
- r = 4
Thus, the coefficients are 2, 2 and 4.
Answered By
1 Like
Related Questions
Match column I with column II and select the correct option using the given codes.
Column I Column II a. A metal that forms amphoteric oxides (i) Ga b. A metal which melts when kept on our palm (ii) Au c. A metal that reacts with nitric acid (iii) Al d. A metal which cannot displace hydrogen from acids (iv) Mn options
- a – (ii), b – (i), c – (iii), d – (iv)
- a – (iii), b – (i), c – (iv), d – (ii)
- a – (iv), b – (ii), c – (iii), d – (i)
- a – (iii), b – (ii), c – (i), d – (iv)
The solution in the given figure is likely to be
options
- HNO3
- C2H5OH
- H2SO4
- CO2 in water
Which among the following is considered as the strongest electrolyte?
options
- Dilute acid
- Dilute sugar solution
- Glucose solution
- Ethanol in water
An aqueous solution ‘A’ turns the phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. Which of the following statement is true for the solutions ‘A’ and ‘B’.
options
- A is strongly basic and B is a weak base.
- A is strongly acidic and B is a weak acid.
- A has a pH greater than 7 and B has a pH less than 7.
- A has a pH less than 7 and B has a pH greater than 7.