Assertion (A) ;. A solution of table salt in a glass of water is heterogeneous.
Reason (R) ;. A solution having same composition through out is homogeneous.
(a) both (A) and (R) are true,and (R) is correct explanation of the assertion.
(b) both (A) and (R) true. and (R) is not the correct explanation of the assertion.
(c) (A) is true,and (R) is false.
(d). (A) is false,and (R) is true
Answers
Answer:
1, Assertion is true but Reason is false. A solution having same composition throughout is homogeneous. Solution of table salt is homogeneous as it is having same composition throughout whereas if a solution have different composition throughout it is said to be heterogeneous.
2, The difference is that the composition of the substance is always the same. The amount of salt in the salt water can vary from one sample to another. All solutions would be considered homogeneous because the dissolved material is present in the same amount throughout the solution.
3, (a) Both A and R are true and R is the correct explanation of A. Explanation: The rates of most reactions increase with a rise in temperature. ... The higher the temperature, the larger the fraction of molecules that can provide the activation energy needed for reaction.
4, (a) Both A and R are true and R is the correct explanation of A. Explanation: The rates of most reactions increase with a rise in temperature. Raising the temperature increases the fraction of molecules having very high kinetic energies.
5, c
Answer :
(c) (A) is true, and (R) is false.
Explanation :
- Homogeneous solutions are those that have the same composition and properties throughout.
- Water completely dissolves table salt. As a result, we get a real solution that is also homogeneous. A homogeneous solution is one that has a consistent composition throughout.
- A homogeneous mixture is one in which the chemical composition is consistent throughout. Because the dissolved salt is evenly distributed throughout the whole saltwater sample, the saltwater described above is homogenous.