Chemistry Solved Questions and Answers Set 18

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Q.1:- The information not conveyed by thermodynamics is about ?

  1. Spontaneity of a reaction
  2. Yields of the products formed
  3. Rates of reactions
  4. All the three above

Q.2:- The standard heat of formation of diamond is ?

  1. Same as that of graphite
  2. Greater than of graphite
  3. Less than that of graphite
  4. Taken as zero

Q.3:- Modern periodic law had been given by ?

  1. Moseley
  2. Mendeleev
  3. Lother-Mayer
  4. Lavoisier

Q.4:- The most electronegative element among the following is ?

  1. Chlorine
  2. Oxygen
  3. Fluorine
  4. Sodium

Q.5:- First of all the elements were classified by ?

  1. Lother Meyer
  2. Newland
  3. Mendeleev
  4. Dobereiner

Q.6:- The sum of mole fractions of the two components of a binary solution is always ?

  1. More than one
  2. Less than one
  3. Exactly one
  4. Not fixed

Q.7:- Blood has been found isotonic with ?

  1. Saturated solution of NaCl
  2. Saturated solution of KCl
  3. Saturated solution of 1.1 mixture of NaCl and KCl
  4. Normal Sodium Chloride solution

Q.8:- To protect Iron against corrosion, the durable metal plating on it, is ?

  1. Tin Plating
  2. Copper Plating
  3. Zinc Plating
  4. Nickel Plating

Q.9:- Adsorption due to strong chemical forces is called ?

  1. Physiosorption
  2. Chemisorption
  3. Reversible Adsorption
  4. Both A and C

Q.10:- The ability of a catalyst to accelerate the chemical reaction is known as ?

  1. Selectivity
  2. Activity
  3. Positive Catalysis
  4. Negative Catalysis
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Q.11:- Which of the following does not contain a Hydrophobic structure ?

  1. Linseed Oil
  2. Lanolin
  3. Glycogen
  4. Rubber

Q.12:- Flux reacts with the impurities to form fusible material which is known as ?

  1. Gangue
  2. Slag
  3. Anode
  4. None

Q.13:- Most of the explosions in mines occur due to the mixing of ?

  1. Hydrogen with Oxygen
  2. Oxygen with Acetylene
  3. Methane with Air
  4. Carbon Dioxide with Ethane

Q.14:- Which of the following statements is true ?

  1. All ores are minerals
  2. All minerals are ores
  3. A mineral cannot be an ore
  4. An ore cannot be a mineral

Q.15:- Which of the following is an ore of Copper here ?

  1. Malachite
  2. Bauxite
  3. Dolomite
  4. Cinnabar

Q.16:- Silver is present in ?

  1. Limonite
  2. Purargyrite
  3. Magnetite
  4. Dolomite

Q.17:- Carbon decomposes potassium carbonate into ?

  1. C
  2. O
  3. KCN
  4. K

Q.18:- Anhydrous Zinc Chloride is prepared by heating ?

  1. ZnCl2.2H2O
  2. Zn+HgCl2
  3. Zn+Cl2
  4. Both (B) and (C))

Q.19:- Cinnabar is an ore of ?

  1. Cu
  2. Zn
  3. Hg
  4. Pb

Q.20:- If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called ?

  1. Hardening
  2. Tempering
  3. Annealing
  4. Softening
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Q.21:- The chemical name of quick lime is ?

  1. Calcium Chloride
  2. Calcium Oxide
  3. Calcium Carbonate
  4. Ammonia

Q.22:- The nature of an aqueous solution of FeCl2 is ?

  1. Basic
  2. Acidic
  3. Amphoteric
  4. Neutral

Q.23:- The chemical name of Plaster of Paris is ?

  1. Calcium Chloride
  2. Calcium Nitrate
  3. Calcium Sulphate Hydrate
  4. None of these

Q.24:- The alum used for purifying water is ?

  1. Chrome Alum
  2. Ammonium Alum
  3. Potash Alum
  4. Ferric Alum

Q.25:- Chief constituent of water glass is ?

  1. Calcium Silicate
  2. Sodium Silicate
  3. Magnesium Silicate
  4. Silicic Acid

 

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