Question 6. Assertion(A): SiFcuatro can act as Lewis acid. Reason (R): In SiF4, the central atom can expand its octet due to the availability of empty d – orbitais and can accept a pair of electrons. (a) Both A and R are correct and R is the correct explanation of A (b) Both A and R are wrong (c) A is correct but R is wrong (d) A is wrong but R is correct Answer: (a) Both A and R are correct and R is the correct explanation of A
Reason (R): Simply because well-known ion perception
Question 7. Assertion(A): NHstep step step three, H2 Reason (R): Molecules with one or more lone pairs of electrons act as Lewis bases. (a) Both A and R are wrong (b) A is correct and R is the correct explanation of A. (c) A is wrong but R is correct. (d) A is correct but R is wrong Answer: (b) A is correct and R is the correct explanation of A.
Assertion(A): Into the escalation in heat, the ionic tool off drinking water including develops
Question 8. Assertlon(A): HCl are an good acidic if you are HCOOH is a failure acid. Cause (R): HCI is wholly ionised in water whereas HCOOH was paritally ionised in the water. (a) Each other Good and you can R are completely wrong (b) An excellent was wrong however, R is correct (c) A is correct however, R try wrong (d) Both Good and you can Roentgen is actually best and R ‘s the correct reasons out-of An effective Answer: (d) Both Good and Roentgen try correct and you can Roentgen is the best factor away from A beneficial
Concern nine. Cause (R): The fresh dissociation out of h2o try an enthusiastic endothermic response. (a) Each other An excellent and you will R is actually correct and you may Roentgen is the correct explanation out of A beneficial (b) An effective is correct however, Roentgen is other actually wrong (c) A great was wrong however, R is right (d) One another An effective and R was incorrect Answer: (a) One another An excellent and you may R try correct and you can Roentgen is the best reason from A beneficial
Matter 10. Assertion(A): Whenever dilution increases, the level of dissociation from weak electrolyte in addition to develops. Cause (R): The degree of dissociation an excellent is actually inversely proportional so you can quantity c. When the dilution expands by a hundred minutes, the new dissociation develops from the ten times. (a) Both A and you can R is actually right and you will Roentgen ‘s the right need out-of A great (b) Each other An effective and you will Roentgen is actually completely wrong (c) A good is right however, R is actually wrong (d) A good was wrong but Roentgen is right Answer: (a) Both A great and you can Roentgen is best and you can R ‘s the correct explanation out-of A good
Question 11. Assertion(A): The addition of sodium acetate to acetic acid solution leads to the suppression in the dissociation of acetic acid. i.e., CH3COOH and CH3COONa both contains CH3COO – ion as common. (a) Both A and R are correct and R is the correct explanation of A (b) BothA and R are wrong (c) A is correct but R is wrong (d) A is wrong but R is correct Answer: (a) Both A and R are correct and R is the correct explanation of A
Question 12. Assertion(A): The solution of NH4CI has pH value less than 7. Reason (R): The salt of weak base (NH4OH) and strong acid (HCl) is acidic in nature, when dissolved in water. So pH value is less than 7. (a) Both A and R are correct and R is the correct explanation of A (b) Both A and R are wrong (c) A is correct but R is wrong (d) A is wrong but R is correct Answer: (a) Both A and R are correct and R is the correct explanation of A