Question

82. The element Z burns in air to form an oxide. The aqueous solution of this oxide turns blue
The element Z is most likely to be.
(a) carbon
(b) calcium
(c) iron
83. Which of the following elements is a metalloid ?
(4) magnesium
(a) sodium
(b) sulphur
(c) silicon
(d) silver
84. Which of the following elements will produce an oxide that will dissolve in water to form a
(a) carbon
(b) calcium
(c) chromium
(d) copper
85. The least reactive metal among the following is:
(a) magnesium
(b) lead
(c) silver
(d) sodium
86. You are given a solution of iron sulphate. Which of the following do you think cannot displac
iron sulphate?
(a) magnesium
(b) calcium
(c) copper
(d) zinc
87. When a vessel is exposed to moist air for a long time, then a green coating is formed on its s
vessel must be made of:
(a) zinc
(b) magnesium
(c) iron
88. Which among the following is the most reactive metal ?
(a) copper
(b) calcium
(C) iron
(2) magnesium
89. The element whose oxide will turn red litmus solution to blue will be:
(a) sodium
(b) sulphur
(c) carbon
(d) phosphorus
20. Which of the following is not a characteristic property of iron?
() copper​

Answer 1

Answer:

82 ka answer b ,83 ka answer c , 84 ka answer b, 85 ka answer c,86ka answer c, 87 ka answer a 88 ka answer b ,89ka answer..