Class 11 Exam  >  Class 11 Questions  >  When hydrochloric acid is added to cobalt (II... Start Learning for Free
When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes place
Q. The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?
  • a)
    ΔH > 0
  • b)
    ΔH < 0
  • c)
    ΔH = 0
  • d)
    The sign of ΔH can’t be predicted based on the given information
Correct answer is 'A'. Can you explain this answer?
Verified Answer
When hydrochloric acid is added to cobalt (II) nitrate solution at roo...

According to the given information, the solution turns pink when cooled in freezing mixture. So, the equilibrium has shifted in backward direction. So we can say that the reaction is endothermic and ∆H for the reaction is greater than zero. This is because, endothermic reactions have ∆H > 0 and they proceed in reverse direction. 
View all questions of this test
Most Upvoted Answer
When hydrochloric acid is added to cobalt (II) nitrate solution at roo...
The answer is B. Exothermic reactions are favoured upon cooling. So, the reverse reaction is exothermic. Foloowed by Lavoiser Laplace law, if the reverse reaction is exothermic, the forward reaction is endothermic to the same extent.
Free Test
Community Answer
When hydrochloric acid is added to cobalt (II) nitrate solution at roo...

According to the given information, the solution turns pink when cooled in freezing mixture. So, the equilibrium has shifted in backward direction. So we can say that the reaction is endothermic and ∆H for the reaction is greater than zero. This is because, endothermic reactions have ∆H > 0 and they proceed in reverse direction. 
Attention Class 11 Students!
To make sure you are not studying endlessly, EduRev has designed Class 11 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 11.
Explore Courses for Class 11 exam

Top Courses for Class 11

When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer?
Question Description
When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer?.
Solutions for When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11. Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.
Here you can find the meaning of When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer?, a detailed solution for When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer? has been provided alongside types of When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice When hydrochloric acid is added to cobalt (II) nitrate solution at room temperature, the following reaction takes placeQ.The solution is blue at room temperature. However, it turns pink when cooled in a freezing mixture. Based upon this information, which of the following expression is correct for the forward reaction?a)ΔH > 0b)ΔH < 0c)ΔH = 0d)The sign of ΔH can’t be predicted based on the given informationCorrect answer is 'A'. Can you explain this answer? tests, examples and also practice Class 11 tests.
Explore Courses for Class 11 exam

Top Courses for Class 11

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev