Chemistry Solved Questions and Answers Set 33

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Q.1:- Which of the following may be used as food preservative ?

  1. Benzene
  2. Sodium Benzoate
  3. Toluene
  4. Sodium Meta-Aluminate

Q.2:- It is reported that there is an ongoing decrease in the pH value of ocean water because of global warming. It happens due to ? [UPSC (CPF) Exam 2015]

  1. Larger uptake of CO2 by ocean water
  2. Lesser uptake of CO2 by ocean water
  3. Larger uptake of atmospheric Nitrogen by ocean water
  4. Lesser uptake of atmospheric nitrogen by ocean water

Q.3:- Which one of the following was used as a chemical weapon in the First World War ? [IAS Exam 1997]

  1. Carbon Monoxide
  2. Hydrogen Cyanide
  3. Mustard Gas
  4. Water Gas

Q.4:- It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning of emission of ?

  1. CO2
  2. CO
  3. Unburnt Petrol
  4. SO2

Q.5:- The water pollution in river is measured by the dissolved amount of ? [IAS Exams 1998]

  1. Chlorine
  2. Ozone
  3. Nitrogen
  4. Oxygen

Q.6:- Which one of the following diseases is caused through the wound or injury or surfaces of unsterilized surgical instruments ? [CDS Exam 2006]

  1. Kala Azar
  2. Chancroid
  3. Diptheria
  4. Tetanus

Q.7:- Which one of the following sets of elements was primarily responsible for the origin of life on the Earth ? [IAS Exam 2012]

  1. Hydrogen, Oxygen, Sodium
  2. Carbon, Hydrogen, Nitrogen
  3. Oxygen, Calcium, Phosphorous
  4. Carbon, Hydrogen, Potassium
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Q.8:- The increasing abundance of greenhouse gases in atmosphere has led to the following effect except ? [CDS Exam 2007]

  1. Global Warming
  2. Depletion of Ozone Layer in the stratosphere
  3. Oxygen fertilization effect
  4. Carbon dioxide fertilization effect

Q.9:- The father of modern chemistry is ?

  1. Priestley
  2. Lavoisier
  3. Dalton
  4. Mendeleev

Q.10:- Diamond is ?

  1. An element
  2. A compound
  3. A mixture
  4. A liquid

Q.11:- Which one of the following substances does not have a melting point ? [NDA Exams 2006]

  1. Bromine
  2. Sodium Chloride
  3. Mercury
  4. Glass

Q.12:- The number of unpaired electrons in carbon atom is ?

  1. 2
  2. 4
  3. 1
  4. 3

Q.13:- Rutherford’s alpha-scattering experiment related to the size of the ?

  1. Nucleus
  2. Atom
  3. Electron
  4. Neutron

Q.14:- 31P15 and 30Si14 are called ?

  1. Isotopes
  2. Isotones
  3. Isobars
  4. None of the above

Q.15:- Which of the following elements is not radio-active ? [SSC Exams 2013]

  1. Zirconium
  2. Uranium
  3. Radium
  4. Plutonium

Q.16:- The compound which contains ionic bond is ?

  1. CH4
  2. N2
  3. CaCl2
  4. CCl4

Q.17:- Energy produced in nuclear reaction is given by ?

  1. Charle’s Law
  2. Grahm’s Law
  3. Gay-Lussac’s Law
  4. Einstein’s Law

Q.18:- An example of a covalent molecule is ? [SSC Exam 2013]

  1. Potassium Chloride
  2. Sodium Chloride
  3. Lead Chloride
  4. Carbon Tetrachloride
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Q.19:- NaCl has ?

  1. Covalent Bond
  2. Ionic Bond
  3. Coordinate Bond
  4. None of the above

Q.20:- A reducing agent is a substance which can ?

  1. Accept electrons
  2. Donate electrons
  3. Accept protons
  4. Donate protons

Q.21:- The acidic Hydrogen is present in ?

  1. Ethyne
  2. Ethene
  3. Benzene
  4. Ethane

Q.22:- Breath analysers used  by police to test drunken drivers works on the chemical basis of ? [SSC Exams 2015]

  1. Redox reactions
  2. Acid-base reactions
  3. Precipitation reactions
  4. Complexion reaction

Q.23:- Tartaric acid is obtained from ?

  1. Apples
  2. Citrus Fruit
  3. Grapes
  4. Tomato

Q.24:- Maleic acid is found in the ?

  1. Apples
  2. Vinegar
  3. Milk
  4. Lemon

Q.25:- The temperature at which the catalytic activity of the catalyst is maximum, is called ?

  1. Critical temperature
  2. Room Temperature
  3. Absolute Temperature
  4. Optimum Temperature

 

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