. Which one of the following salts does not con-tain water of crystallisation?
Anonymous Quiz
26%
Blue vitrol
39%
Baking soda
15%
Washing soda
21%
Gypsum
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Tomato is a natural source of which acid?
Anonymous Quiz
17%
Acetic acid
25%
Citric acid
33%
Tartaric acid
25%
Oxalic acid
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At what temperature is gypsum heated to form Plaster of Paris?
Anonymous Quiz
13%
90
62%
100
20%
101
5%
010
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How many water molecules does hydrated cal-cium sulphate contain?
Anonymous Quiz
17%
5
36%
10
20%
7
26%
2
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Sodium hydroxide turns phenolphthalein solution
Anonymous Quiz
45%
Pink
21%
Yellow
29%
Colourless
4%
Orange
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The most abundant metal in the earth’s crust is
Anonymous Quiz
36%
Iron
46%
Aluminium
8%
Calcium
10%
Sodium
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The electronic configuration of three elements X, Y and Z are as follows:
X = 2, 4, Y = 2, 7, Z = 2,1 Which two elements will combine to form an ionic compound and write the correct formula,
X = 2, 4, Y = 2, 7, Z = 2,1 Which two elements will combine to form an ionic compound and write the correct formula,
Anonymous Quiz
17%
Xy
59%
Yz
17%
Zx
7%
None
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The atomic number of an element ‘X’ is 12. Which inert gas is nearest to X?
Anonymous Quiz
18%
He
30%
Ar
47%
Ne
4%
Xe
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An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the followingAn element X is soft and Identify the element from the following
Anonymous Quiz
20%
Mg
64%
Na
11%
P
5%
Ca
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