MCQs: Which of the following gases were called Fixed Air by Scottish physician Joseph Black which is discovered in 1750s?
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MCQs: Who discovered Benzene?
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MCQs: Which of the following subatomic particle was discovered by Goldstein on the basis of the cathode ray experiment?
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MCQs: Which of the following materials can be used by a farmer to treat the too acidic soil of his fields?
1: Quick lime (CaO)
2: Slaked lime (Ca(OH)2)
3: Chalk (CaCO3)
Select the correct option from the codes given below:
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MCQs: Indicators such as litmus can be used to determine:
1: Acidity or alkalinity of a solution
2: pH value of a solution
Select the correct option from the codes given below:
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MCQs: People suffering from acidity are given antacid tablets with most commonly which of the following salts?
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MCQs: Which of the following is / are correct statement(s) about Sir Shanti Swaroop Bhatnagar?
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MCQs: Which of the following is correct combination of masses of the three sub-atomic particles?
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MCQs: Which of the following is correct electronic configuration of Krypton, whose atomic number is 36?
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MCQs: Which of the following isotope of Hydrogen has only one neutron?
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MCQs: Which of the following salts and their chemical names are correctly paird?
1: White vitriol – Zinc sulfate
2: Red Vitriol – Copper sulfate
3: Green Vitriol – Ferrous sulfate
Select the correct option from the codes given below:
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MCQs: Crystals of a compound changes its blue color to white on heating in a closed container. However, it regains blue color after sometime when allowed to cool down. This compound is of which of the following metals?
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MCQs: Which does the gas turn lime water milky?
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MCQs: Seaweeds are an important source of which of the following?
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MCQs: Which gas is used to manufacture vanaspati from vegetable oil?
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MCQs: The nucleus of an atom consists of which of the following?
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MCQs: Alpha (α) particles are helium (He) nucleus with a charge of
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MCQs: When two light nuclei combine to form a heavier nucleus, the process is said to be
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MCQs: If a C-14 has a half-life of 5730 years, then how long will it take for the number of C-14 in a sample to drop to 1/8 of initial quantity?
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MCQs: In the nuclide defined by &¹⁵&₇X, the number of protons and neutrons respectively are
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