Chemistry MCQ Questions for Competitive Exam: General Science is extremely important for all the competition exams & questions based on General Science or General Awareness are frequently asked in various exams like Railway NTPC, UPSC IAS (Civil Service Exam), SSC, Railway Group D, etc. Here we are going to share some of The Most Interesting Biology Questions and Answers that can help you to improve your science gk knowledge. (Chemistry MCQ Questions for Competitive Exam)
| Chemistry General Knowledge Questions and Answers |
Q.1 The non-metal which has a shining appearance is
(a) sulphur (b) phosphorus (c) iodine (d) bromine
Ans: (c)
Q.3 Which is the ‘odd man’ in the following?
(a) brass (b) common salt (c) cane sugar (d) water
Ans: (a)
Q.4 Which of the following is called ‘the King of Chemicals?
(a) Nitric acid (b) Hydrochloric acid (c) Silver nitrate (d) Sulphuric acid
Ans: (d)
Q.5 The modern system of symbols was evolved by
(a) Dalton (b) Cavendish (c) Avogadro (d) Berzelius
Ans: (d)
Q.6 The neutron was discovered by
(a) Chadwick (b) Madam Curie (c) Becquerel (d) Aston
Ans: (a)
Q.7 A mixture of ethyl alcohol and water can be separated by
(a) evaporation (b) sublimation (c) using a separating funnel (d) fractional distillation
Ans: (d)
Q.8 The Long Form of the Periodic Table is based on
(a) atomic number (b) valency (c) atomic mass (d) atomic radius
Ans: (a)
Q.9 The term ‘nucleons’ apples to
(a) neutrons (b) protons (c) protons and neutrons (d) protons and electrons
Ans: (c)
Q. 10 Isotopes differ in the number of
a) Protons b) Neutrons c) Electrons d) Protons and electrons
Ans: (b)
Q.11 Radium was isolated from
(a) galena (b) dolomite (c) sylvine (d) pitchblende
Ans: (d)
Q.12 Real gases tend to become ideal Under
(a) low pressure and high temperature (b) low pressure and low temperature (c) high pressure and low temperature (d) high pressure and high temperature
Ans: (a)
Q.13 The Combined Gas Law equation is
(a) P1V1T1 = P2 V2 T2 (b) P1V1T2 = P2V2T1 (c) P = P1 + P2 + P3 (d) C =
Ans: (b)
Q.14 The value of Avogadro Number is
(a) 6.023 x 1022 (b) 1 x 10-14 (c) cl 6.056 x 10-6 (d) 6.023 x 1023
Ans: (d)
Q.15 The addition of a neutron to the nucleus of an atom
(a) increases the atomic mass of the atom
(b)decreases the atomic mass of the atom
(c) increases the charge on the nucleus
(d) decreases the charge on the nucleus
Ans: (a)
Q.16 Which of the following is a halogen?
(a) Radon (b) Astatine (c) Cesium (d) Ruthenium
Ans: (b)
Q.17 Which among the following is a metalloid?
(a) Tin (b) Silver (c) Iodine (d) Arsenic
Ans: (d)
Q.18 A non-metal which is a good conductor of electricity is
(a) graphite (b) phosphorus (c) sulphur (d) iodine
Ans: (a)
Q.19 An element which is preserved under water is
(a) Sodium (b) red phosphorus (c) white phosphorus (d) sulphur
Ans: (c)
Q.20 Quick lime has the formula
a) CaO b) Ca(OH)2 c) NaOH d) Na2CO3
Ans: (a)
Q.21 ‘Hypo’ is
(a) sodium nitrate (b) Potassium nitrate (c) sodium thiosulphate (d) ammonium chloride
Ans: (c)
Q.22 The compound used in photography is
(a) ammonium dichromate (b) copper Sulphate (c) magnesium Sulphate (d) sodium thiosulphate
Ans: (d)
Q.23 Brine is a solution of
(a) sodium chloride in water (b) iodine in alcohol (c) sulphur in carbon disulphide (d) Potassium iodide in water
Ans: (a)
Q.24 Which of the following is a Bleaching agent?
(a) Potassium chlorate (b) Hydrogen peroxide (c) Copper sulphate (d) Silver Nitrate
Ans: (b)
Q.25 Alum is used
(a) as an analgesic (b) in the purification of water (c) as a fertilizer (d) as a disinfectant
Ans: (b)
Q.26 Lunar caustic is
(a) calcium sulphate (b) ammonium chloride (c) caustic soda (d) silver nitrate
Ans: (d)
Q.27 The formula for cane sugar is
(a) C6H12O6 (b) C2H5OH (c) C12H22O11 (d) C7H8O
Ans: (c)
Q.28 Which of the following is not a chemical change?
(a) Burning of magnesium ribbon in air (b) Distillation of water (c) Heating of cane sugar (d) Setting of cement
Ans: (b)
Q.29 The process that takes place in the atom bomb is
(a) nuclear’ fusion (b) radioactive disintegration (c) nuclear fission (d) chemical decomposition
Ans: (c)
Q.30 Which of the following is not a metal?
(a) Lithium (b) Helium (c) Sodium (d) Cobalt
Ans: (b)
Q.31 Solid carbon dioxide is used
(a) as a drying agent (b) as a refrigerant (c) as an antiseptic (d) as a bleaching agent
Ans: (b)
Q.32 A burning substance which continues to burn in a jar of carbon dioxide is
(a) zinc (b) red phosphorus (c) magnesium (d) sulphur
Ans: (c)
Q.33 The first organic compound prepared in the laboratory was
(a) acetic acid (b) chloroform (c) urea (d) methane
Ans: (c)
Q.34 Marble is (a) calcium carbonate
(b) sodium carbonate (c) magnesium sulphate (d) ferric chloride
Ans: (a)
Q.35 Compounds containing only carbon and hydrogen are called
(a) carbohydrates (b) carbides (c) hydrocarbons (d) carbonyls
Ans: (c)
Q.36 The form of carbon used in the decolourising sugar solution is
(a) wood charcoal (b) animal charcoal (c) coconut charcoal (d) lamp black
Ans: (b)
Q.37 Artificial diamonds were produced by
(a) Moissan (b) Davy (c) Faraday (d) Marie Curie
Ans: (a)
Q.38 Marsh gas is
(a) ethane (b) ethylene (c) acetylene (d) methane
Ans: (d)
Q.39 The oldest known organic compound is
(a) urea (b) methane (c) acetic acid (d) benzene
Ans: (c)
Q.40 Vinegar is the trade name for
(a) chloroform (b) acetic acid (c) phenol (d) carbon tetrachloride
Ans: (b)
Q.41 The scientist who synthesised the first organic compound (urea) in the laboratory was
(a) Wohler (b) Dalton (c) Lavoisier (d) Fischer
Ans: (a)
Q.42 Methylated spirit is a mixture of
(a) methyl alcohol and acetic acid (b) methyl alcohol and ethyl alcohol (c) ethyl alcohol and pyridine (d) methyl alcohol and pyridine
Ans: (b)
Q.43 Which of the following is used as a food preservative?
(a) phenol (b) washing soda (c) absolute alcohol (d) vinegar
Ans: (d)
Q.44 Which of the following is baking soda?
(a) Na2CO3 . 10H2O (b) NaHCO3 (c) Na2CO3 . H2O (d) NH4CI
Ans: (b)
Q.45 The carbon cycle ensures that
(a) the percentage of carbon dioxide in the air is kept almost constant
(b)air always contains a constant proportion of oxygen
(c) sufficient amounts of carbohydrates are produced
(d) the process of photosynthesis proceeds smoothly
Ans: (a)
Q.46 The simplest hydrocarbon is
(a) benzene (b) methane (c) ethane (d) butane
Ans: (b)
Q.47 During fermentation, the by-product is
(a) ethyl alcohol (b) methyl alcohol (c) carbon monoxide (d) carbon dioxide
Ans: (d)
Q.48 If people sleep in closed rooms where the charcoal fire is burning, they die due to
(a) carbon monoxide (b) carbon dioxide (c) methane (d) phosgene
Ans: (a)
Q.49 Carbogen is used in
(a) CO2 poisoning (b) CO poisoning (c) phosgene poisoning (d) anaesthesia
Ans: (b)
Q.50 Soda-water contains
(a) sodium bicarbonate (b) sodium carbonate (c) carbonic acid (d) sodium hydroxide
Ans: (c)
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