Inorganic Chemistry , Groups

Q: Which has soapy touch?

(a) :  Na2B4O7
(b) :  H3BO3
(c) :  Ca2B6O11
(d) :  HBO2
(e) :  None of the Above
Answer:  H3BO3
Explanation:  

Q: What is the oxidation state of lead?

(a) :  ₊ 4
(b) :  -4
(c) :  ₊ 4 and - 4
(d) :  ₊ 2 and ₊ 4
(e) :  None of the Above
Answer:  ₊ 2 and ₊ 4
Explanation:  

Q: Borax or Tincal formula is

(a) :  Na2B4O7 . 10H2O
(b) :  Ca2B6O11 . 5H2O
(c) :  Al2O3 . 2H2O
(d) :  Al2O3
(e) :  None of the Above
Answer:  Na2B4O7 . 10H2O
Explanation:  

Q: Pb has inert pair of electrons:

(a) :  One
(b) :  two
(c) :  three
(d) :  four
(e) :  None of the Above
Answer:  two
Explanation:  

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