NCERT Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: Exercise

Author:NCERT

NCERT Science Solutions for Exercise - NCERT Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: Exercise

Attempt the practice questions on Chapter 1: Chemical Reactions and Equations, Exercise 1: Exercise with hints and solutions to strengthen your understanding. Science Textbook of Competency Based Questions for Class X solutions are prepared by Experienced Embibe Experts.

Questions from NCERT Solutions for Chapter: Chemical Reactions and Equations, Exercise 1: Exercise with Hints & Solutions

MEDIUM
10th CBSE
IMPORTANT

The equation given below shows the reaction for cellular respiration. Cellular respiration is a chemical process by which cells convert glucose to energy.

C6H12O6 + 6O2 6CO2 + 6H2O + Energy (glucose)   (oxygen) (carbon  (water)                                       dioxide)

Carbon dioxide and water are the two new substances formed during cellular respiration. What are they known as?

MEDIUM
10th CBSE
IMPORTANT

A piece of magnesium ribbon is added to a flask containing dilute hydrochloric acid.
Hydrogen gas is formed which is collected in the measuring cylinder.
The line on the graph indicates the rate of chemical reaction occurring in the flask.
The amount of hydrogen formed with time is plotted on a graph.

Question Image.

At what time is the reaction rate the fastest in the flask?

MEDIUM
10th CBSE
IMPORTANT

A piece of magnesium ribbon is added to a flask containing dilute hydrochloric acid.
Hydrogen gas is formed which is collected in the measuring cylinder.
The line on the graph indicates the rate of chemical reaction occurring in the flask.
The amount of hydrogen formed with time is plotted on a graph.

Question Image.

The reaction is repeated with magnesium powder in place of magnesium ribbon under the same conditions. Will the reaction rate increase or decrease?

Explain your answer with reference to the volume of hydrogen formed in the flask at 2 minutes.

MEDIUM
10th CBSE
IMPORTANT

A piece of magnesium ribbon is added to a flask containing dilute hydrochloric acid.
Hydrogen gas is formed which is collected in the measuring cylinder.
The line on the graph indicates the rate of chemical reaction occurring in the flask.
The amount of hydrogen formed with time is plotted on a graph.

Question Image.

Which of these could increase the rate of reaction in the flask?

MEDIUM
10th CBSE
IMPORTANT

Magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas.

Write a balanced chemical equation to show the reaction.

MEDIUM
10th CBSE
IMPORTANT

Which of these is an example of decomposition reaction?

MEDIUM
10th CBSE
IMPORTANT

Methane gas released from waste water treatment plants can be used as a source of fuel. Which chemical equation represents combustion of methane to produce heat energy?

MEDIUM
10th CBSE
IMPORTANT

Which of the following is an example of a combination reaction?