At what temperature is gypsum heated to form Plaster of Paris?
Anonymous Quiz
27%
90 degree celsius
51%
100 degree celsius
17%
120 degree celsius
6%
110 degree celsius
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Forwarded from Shubham Jha - Class 9
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The number of protons in an atom of an element A is 19 then, the number of electron in its ion A+ is:
Anonymous Quiz
26%
18
53%
19
19%
20
2%
21
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The sulphide ores are converted into oxides by heating strongly in the presence of excess air. This process is known as
Anonymous Quiz
35%
Roasting
32%
Smelting
25%
Calcination
9%
Refining
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enzymes pepsin and trypsin are secreted respectively by
Anonymous Quiz
34%
Stomach and pancreas
27%
Salivary gland and stomach
37%
Liver and pancreas
2%
None
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Among the following choose the correct option which includes the organisms that have a holozoic mode of nutrition:
Anonymous Quiz
42%
Plasmodium and Amoeba
25%
Parakeet and Amoeba
24%
Paramecium and Plasmodium
9%
Paramecium and Parasite
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Which of the given properties is generally not shown by metals?
Anonymous Quiz
21%
Electrical conduction
17%
Ductility
47%
Dullness
14%
Sonorous
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The ability of metals to be drawn into thin wire is known as
Anonymous Quiz
39%
Ductility
42%
Malleability
14%
Sonorous
5%
None
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Generally metals react with acids to give salt and hydrogen gas. Which of the given acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
Anonymous Quiz
32%
H2so4
25%
Hcl
25%
Hno3
18%
Alll
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