Anil Ahlawat Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: EXERCISES
Anil Ahlawat Science Solutions for Exercise - Anil Ahlawat Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: EXERCISES
Attempt the free practice questions on Chapter 1: Chemical Reactions and Equations, Exercise 1: EXERCISES with hints and solutions to strengthen your understanding. NSO Science Olympiad Workbook Grade 10 solutions are prepared by Experienced Embibe Experts.
Questions from Anil Ahlawat Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: EXERCISES with Hints & Solutions
Two colourless solutions X and Y were mixed together. On mixing, a yellow precipitate Z was formed. Which of the following statements is correct regarding X, Y and Z?
x and y in the given reaction are respectively.
Take of sodium sulphate solution in a test tube and of barium chloride solution in another test tube. When the two solutions are mixed slowly and the test tube is left undisturbed for some time, a white precipitate is formed. Which of the following statements is correct about the above reaction?
For the given reaction, match column I with column II and mark the correct option from the codes given below.
| Column I | Column II | ||
| (a) | Oxidising agent | (i) | |
| (b) | Reducing agent | (ii) | |
| (c) | (iii) | ||
| (d) | (iv) |
Read the given passage and fill in the blanks by choosing an appropriate option.
When a limited quantity of water is sprinkled over a dirty white stone called ___(i)___ an ___(ii)___ reaction takes place. After some time, the stone-like substance changes into a white amorphous powder called ___(iii)___ which is used for ___(IV)___.
| (i) | (ii) | (iii) | (iv) | |
| (A) | Plaster of Paris | Exo-thermic | Quick lime | Medical purposes |
| (B) | Quick lime | Exo-thermic | Slaked lime | Whitewashing |
| (C) | Sodium bicarbonate | Endo-thermic | Sodium carbonate | Baking |
| (D) | Calcium carbonate | Endo-thermic | Calcium oxide | Whitewashing |
Four test tubes were taken and marked respectively. ml of an aqueous solution of aluminium sulphate was filled in each test tube. A piece of metal zinc was placed in a test tube , iron in a test tube , copper in a test tube and aluminium in a test tube . Mark the correct change in colour in the four test tubes.
| 1 | 2 | 3 | 4 | |
| (A) | Colourless | Green | Blue | Colourless |
| (B) | Light green | Green | Blue | Pale yellow |
| (C) | Light blue | Colourless | Colourless | Light blue |
| (D) | Colourless | Colourless | Colourless | Colourless |
Study the given table carefully.
| S,No. | Metal | Reaction with dilute |
| 1. | P | No change |
| 2. | Q | The temperature of reaction mixture rises |
| 3. | R | Reaction is explosive |
| 4. | S | Some gas bubbles are seen |
Metal P, Q, R and S could be respectively.
Read the given statements and mark the correct option.
Statement 1: When a mixture of hydrogen and chlorine is placed in sunlight, hydrogen chloride is formed.
Statement 2: It is an example of a displacement reaction.
