Chemistry Questions

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1 Eugen Goldstein discovered in 1886 that atoms also have
1 year, 15 days ago, In Chemistry
2 What is an Alkali and Alkaline solution?
1 year, 15 days ago, In Chemistry
3 What is the difference between Steel and Stainless Steel?
1 year, 15 days ago, In Chemistry
4 1. Which one of the following non metals is not a poor conductor of electricity A. Sulphur B. Selenium C. Bromine D. Phosphorus
1 year, 15 days ago, In Chemistry
5 How many valence electrons does chromium have?
1 year, 15 days ago, In Chemistry
6 What is the difference between Steel and Stainless Steel?
1 year, 15 days ago, In Chemistry
7 What is the density of carbon dioxide at STP?
1 year, 15 days ago, In Chemistry
8 What is the chemical name for HCH3CO2?
1 year, 15 days ago, In Chemistry
9 Is magnesium oxide ionic or covalent?
1 year, 15 days ago, In Chemistry
10 Aluminum is a main-group metal and therefore loses electrons to form a cation with the same number of electrons as the nearest noble gas. Are cation atoms that have lost an electron positively charged
1 year, 15 days ago, In Chemistry
11 The number of moles of solute present in 1 kg of a solvent is called its A. molality B. molarity C. normality D. formality
1 year, 15 days ago, In Chemistry
12 Which one of the following is not a chemical change ? A. Burning of coal in air B. Fermentation of sugarcane juice C. Cracking of petroleum D. Crystallization of table salt from sea water
1 year, 15 days ago, In Chemistry
13 The oldest rocks in the earth's crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rock's called A. granite B. basalt C. igneous rocks D. sedimentary rocks
1 year, 14 days ago, In Chemistry
14 The nucleus of a hydrogen atom consists of A. 1 proton only B. 1 proton + 2 neutron C. 1 neutron only D. 1 electron only
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15 What causes convection currents?
11 months, 22 days ago, In Chemistry
16 What is the symbol for Silver?
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17 what are immiscible liquids?
10 months, 22 days ago, In Chemistry
18 How will you calculate how many moles of glucose present in 320 mL of 5.0 M of glucose solution?
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19 Explain what is the difference between fractionation and distillation?
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20 Define what is Avogadro’s law?
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21 Explain what is the formula you will use to calculate how many millilitres of 5.5 M NaOH are required to prepare 400 mL of 1.5M NaOH?
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22 Explain what is the chemical composition of fat in human body?
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23 1. Hydrocarbons are organic compounds with element a) Hydrogen b) Oxygen c) Carbon d) Both hydrogen and carbon
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24 Find the odd one out: a) Aromatic b) Alkanes c) Alkynes d) Alkenes
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25 The simplest member of organic compounds is ? a) Methanol b) Methane c) Formaldehyde d) Formic acid
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26 Ethane is obtained by electrolyzing a) Potassium formate b) Potassium succinate c) Potassium acetate d) Potassium fumarate
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27 “Methane is a product of aerobic respiration”. State true or false a) False b) True
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28 Calcium carbide on reaction with water gives? a) Methane b) Ethane c) propane d) Acetylene
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29 Name the process associated with acylation of benzene a) Friedel craft reaction b) Wurtz reaction c) Wurtz fitting reaction d) Debey Huckel reaction
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30 The hydrocarbon in which all the 4 valencies of carbon are fully occupied is called as a) Alkene b) Alkyne c) Alkane d) Cycloalkane
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31 Chlorination of alkanes is an example of a) Radical b) Elimination c) Free radical d) Addition
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32 Liquid hydrocarbon is converted into gaseous hydrocarbon by: a) Oxidation b) Hydrolysis c) Cracking d) Distillation
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