`B+underset(conc.)(HNO_(3))tounderset("white solid")(A)+underset("brown gas")(B)`
How many of the following statements are correct regarding products (A) & (B) ?
(1) `(A)` can be prepared by reacting borax with dilute acids.
(2) `(A)` is a weak monobasic lewis acid.
(3) `(A)` behaves like an electrolyte when dissolved in water.
(4) `(A)` can be prepared by reacting colemanite, `SO_(2)` & `H_(2)O`
(5) `(B)` is paramagnetic in nature.
(6) `(B)` is a mixed anhydride.
(7) `(B)` does not forms a dimer
(8) `(B)` reacts with `NaOH(aq)` undergoing disproportionation.
(9) Bond angle about central atom is greater in `(A)` than in `(B)`. (Assume atom forming maximum number of bonds as central atom)

Explanation

To solve the question regarding the products (A) and (B) formed from the reaction of boron with concentrated nitric acid, we need to analyze each statement provided and determine their correctness based on the properties of the products formed.

### Step-by-Step Solution:

1. **Identify Products (A) and (B)**:
- When boron (B) reacts with concentrated nitric acid (HNO3), it produces:
- **Product (A)**: Orthoboric acid (H3BO3), which is a white solid.
- **Product (B)**: Nitrogen dioxide (NO2), which is a brown gas.
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