Question

53. Which nong the following is formed when cold milk of lime reacts with chlorine?
1) Ble hing powder 2) Gamaxene 3) Caco;
4) Ca(HCOH
54. Whic is used as constituent of chewing gum?
1) MgCO,
2) BeCO,
3) Caso
42 C.CO.
55. Which element do not impart any colour to the flame test?
1) Mg
2) Ca
3) Sr
la
56. The most stable oxidation state of Thallium is:
3) 44
57. Borax glass is a mixture of
1) Na, B,0, + B.0
2) W-BO+ B.O
3) Na,B,0,.101,0 + B,0,
+4) Maß0). + 8,0
58. A bond that does not exist in diborane is:
1)B-
H
2 ) B-B
+3) B-H-
B 4 ) H -- B - H
59. Boron is unable to form BF jon because
1) Boron do not react with Fluorine
2) Boron is electron deficient
3) Boron is Lewis acid
4) Boron is unable to expand its Octet
60. Which is not correct about orthoboric acid?
1) It has layer structure with planar BO: units joined by hydrogen bonds
2) It is a weak monobasic acid
3) On heating above 370 K it forus tetraboric acid
4) It acts a Lewis acid​

Answer 1

Answer:

1_2.gamaxene

2_3. caso

3_1. mg