Given below are two statements:
Assertion (A): | Boric acid is considered a weak acid. |
Reason (R): | Boric acid is not able to release H+ ions on its own. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |
A. | BeSO4 and MgSO4 are insoluble in water. |
B. | Magnesium is the central metal atom in chlorophyll. |
C. | Pb4+ acts as an oxidizing agent. |
D. | The study of only emission, not absorption spectra is referred to as spectroscopy. |
E. | Diborane is prepared by treating BF3 with LiAlH4 |
Which of the following statements are correct?
(Answer on the basis of the given figure.)
a. | The two bridged hydrogen atoms and the two boron atoms lie in one plane |
b. | Out of six B-H bonds, two bonds can be described in terms of 3-center-2-electron bonds |
c. | Out of six B-H bonds, four B-H bonds can be described in terms of 3 center 2 electron bonds |
d. | The four-terminal B-H bonds are two center-two electron angular bonds |
Choose the correct option
1. (a, b, c)
2. (b, c, d)
3. (a, c, d)
4. (a, b, d)