General Science - Chemistry

21. What is the chemical name of Quick lime?
[A] Calcium peroxide
[B] Calcium oxide
[C] Calcium dioxide
[D] Calcium hydroxide

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22. Which of the following is NOT correct about Carbon dioxide?
[A] It is a colourless and odourless gas
[B] It forms hydrogen peroxide with water
[C] it has low solubility in water
[D] None of the above

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23. Which of these is NOT an allotropic form of carbon?
[A] Diamond
[B] Graphite
[C] Fullerene
[D] None of the above

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24. Which of the following element is NOT an alkaline earth metal?
[A] Magnesium
[B] Strontium
[C] Barium
[D] Beryllium

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25. Which of the following alkaline earth metals is the rarest in the earth crust?
[A] Calcium
[B] Strontium
[C] Radium
[D] Beryllium

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26. What is water gas?
[A] mixture of CO and H2
[B] mixture of CO and H2O
[C] mixture of CO2 and H2
[D] Carbon mono-oxide

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27. Which of the following is NOT correct about Xenon Hexafluoride?
[A] It is a noble gas compound
[B] At room temperature, it is a colourless liquid
[C] Both a and b
[D] None

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28. Which of the following elements have a compound named as Hydrogen peroxide?
[A] Hydrogen, Carbon and Oxygen
[B] Hydrogen only
[C] Hydrogen and Oxygen
[D] Hydrogen, Oxygen and Potassium

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29. What is the hemihydrate of calcium sulphate commonly known as?
[A] Gypsum
[B] Plaster of Paris
[C] Chloroform
[D] Limestone

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30. Which of the following is NOT correct about Phosphine?
[A] The chemical formula is PH3
[B] The electronic structure is like Ammonia
[C] It is odorless
[D] it is used as a dopant in semiconductor industries

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