Chemistry Solved Questions and Answers Set 19

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Q.1:- Activated charcoal is employed to remove colouring matter from pure substance, it works by ?

  1. Bleaching
  2. Oxidation
  3. Reduction
  4. Adsorption

Q.2:- Important ore of lead is ?

  1. Cassiterite
  2. Siderite
  3. Haematite
  4. Galena

Q.3:- Which one of the following is most reactive ?

  1. White phosphorous
  2. Black phosphorous
  3. Violet phosphorous
  4. Scarlet phosphorous

Q.4:- Ozone molecule is ?

  1. Linear
  2. Paramagnetic
  3. Diamagnetic
  4. Tetrahedral

Q.5:- The following compound reacts with concentrated H2SO4 to give CO2 gas ?

  1. Formic Acid
  2. Sugar
  3. Oxalic Acid
  4. Ethanol

Q.6:- Sulphuric acid has great affinity for water because ?

  1. It hydrolysis the acid
  2. It decomposes the acid
  3. Acid forms hydrates with water
  4. None

Q.7:- Anhydride of hypo chlorus acid is ?

  1. Cl2O
  2. ClO2
  3. Cl2O5
  4. ClO3

Q.8:- The characteristics odour of garlic is due to ?

  1. A chloro compound
  2. A sulphur compound
  3. A fluorine compound
  4. Acetic Acid

Q.9:- Which one is not an organic compound ?

  1. Ammonium Cyanate
  2. Marsh Gas
  3. Urea
  4. Cane Sugar

Q.10:- Latest technique for purification, isolation and separation of organic compounds is ?

  1. Chromatography
  2. Steam distillation
  3. Crystallization
  4. Vacuum Distillation

Q.11:- Anthracene is purified by ?

  1. Filtration
  2. Distillation
  3. Crystallization
  4. Sublimation

Q.12:- Compounds having same number and kind of atoms but different arrangement of atoms in their molecules are called ?

  1. Allotropes
  2. Isotopes
  3. Isomers
  4. Polymers
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Q.13:- Petroleum is found ?

  1. On the surface of the earth
  2. In the atmosphere
  3. In arctic ocean
  4. Deep under the surface of the earth

Q.14:- Successive alkens differ by ?

  1. CH2
  2. CH
  3. CH3
  4. C2H4

Q.15:- Ethanol containing some methanol is called ?

  1. Methylated Spirit
  2. Rectified Spirit
  3. Absolute Spirit
  4. None of these

Q.16:- Fermentation of Ethyl Alcohol into acetic acid is done by ?

  1. Zymase
  2. Diastase
  3. Maltase
  4. Bacterium Mycoderma Aceti

Q.17:- Which of the following is used in synthetic lemonade ?

  1. Tartaric Acid
  2. Acetic Acid
  3. Citric Acid
  4. Oxalic Acid

Q.18:- The offending substance in the liquor tragedies leading to blindness etc. is ?

  1. Ethyl Alcohol
  2. Amyl Alcohol
  3. Benzyl Alcohol
  4. Methyl Alcohol

Q.19:- Starch is a polymer of ?

  1. Fructose
  2. Glucose
  3. Both (A) and (B)
  4. None of these

Q.20:- Which one is not the essential constituent of balanced diet ?

  1. Hormones
  2. Carbohydrates
  3. Fats
  4. Vitamins

Q.21:- Which one of the following contains Cobalt ?

  1. Chlorophyll
  2. Haemoglobin
  3. Vitamin C
  4. Vitamin B12

Q.22:- Keratin, a fibrous protein is present in ?

  1. Hair and Nails
  2. Wool
  3. Skin
  4. All of these
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Q.23:- Global warming may result in ?

  1. Flood
  2. Cyclone
  3. Decrease in forest productivity
  4. All of the above

Q.24:- Acid rain is caused by the pollution of environment by ?

  1. Carbon Dioxide and Nitrogen
  2. Carbon Monoxide and Carbon Dioxide
  3. Ozone and Carbon Dioxide
  4. Nitrous Oxide and Sulphur Dioxide

Q.25:- Which one of the following is not a cause for present global warming and climate change ?

  1. CFC Emission
  2. Carbon Dioxide Emission
  3. Deforestation
  4. Methane Emission

 

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