Chemistry Solved Questions and Answers Set 8

January 24, 2019 entranciology Chemistry Solved Questions and Answers Sets, Solved Questions and Answers Sets For Competitive Exams 0

Q.1:- Aluminium bears a diagonal relationship with ?

  1. Beryllium
  2. Boron
  3. Carbon
  4. Gallium

Q.2:- In the following four elements, the ionization potential of which one is the highest ?

  1. Argon
  2. Barium
  3. Caesium
  4. Oxygen

Q.3:- Which of the following is not a liquid element ?

  1. Br
  2. Ga
  3. Fr
  4. Ca

Q.4:- The long form of periodic table is based on ?

  1. Electronegativity
  2. Mass of the atom
  3. Shape of the atom
  4. Atomic Number

Q.5:- Alkali metals are in a group ?

  1. II A
  2. VII A
  3. I A
  4. III A

Q.6:- The first element of rare earth metal is ?

  1. Cerium
  2. Actinium
  3. Uranium
  4. Lanthanum

Q.7:- The screening effect of inner electrons of the nucleus causes ?

  1. Decrease in the ionisation energy
  2. Increase in the ionisation energy
  3. No effect on the ionisation energy
  4. Increase in the attraction of the nucleus to the electrons

Q.8:- The lightest metal is ?

  1. Li
  2. Fe
  3. Cu
  4. Ag
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Q.9:- Which one of the following is also known as solution ?

  1. A compound
  2. A homogeneous mixture
  3. A heterogeneous mixture
  4. A suspension

Q.10:- A solution which obeys Raoult’s law is ?

  1. Normal
  2. Molar
  3. Ideal
  4. Saturated

Q.11:- The solubility of a gas in liquid increases with ?

  1. Increase in temperature
  2. Reduction of gas pressure
  3. Decrease in temperature and increase in gas pressure
  4. Amount of liquid taken

Q.12:- Saturated solution of NaCl on heating becomes ?

  1. Supersaturated
  2. Unsaturated
  3. Remains saturated
  4. None of these

Q.13:- Which one is the heaviest ?

  1. 25g Hg
  2. 2 moles of H2O
  3. 2 moles of CO2
  4. 4 g atoms of O2

Q.14:- The hard shell of an egg was dissolved in HCL. The egg was then place in a concentrated solution of NaCl. What will happen ?

  1. The egg will shrink
  2. The egg will swell
  3. The egg will become harder
  4. There will be hardly any visible change
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Q.15:- In which mode of express, the concentration of the solution remains independent of temperature ?

  1. Normality
  2. Molality
  3. Molarity
  4. Formality

Q.16:- The life span of a Daniell cell may be increased by ?

  1. Larger Zn electrode
  2. Larger Cu electrode
  3. Lowering the temperature
  4. Lowering the concentrations

Q.17:- The deterioration of a metal by electrochemical process is commonly termed as ?

  1. Corrosion
  2. Passivation
  3. Abrasion
  4. Erosion

Q.18:- The extent of adsorption of a gas, on a solid depends upon ?

  1. Nature of gas
  2. Temperature of gas
  3. Pressure of gas
  4. All of these

Q.19:- An example of an associated colloid is ?

  1. Vegetable oil
  2. Rubber latex
  3. Soap solution
  4. Milk

Q.20:- Colloidal solution are not purified by ?

  1. Electrodialysis
  2. Electrophoresis
  3. Ultrafication
  4. Dialysis

Q.21:- Which of the following cell is a secondary cell ?

  1. Dry cell
  2. Mercury cell
  3. Fuel cell
  4. Ni cell
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Q.22:- The element with the highest electrical conductivity is ?

  1. Aluminium
  2. Copper
  3. Gold
  4. Silver

Q.23:- Which one is an emulsifier ?

  1. Soap
  2. Water
  3. Oil
  4. Linseed oil

Q.24:- In acid base catalysis, the real catalyst is ?

  1. Acid
  2. Base
  3. Acid and Base
  4. H+ ions

Q.25:- The cleaning action of soap and detergent in water is due to the formation of ?

  1. Micelle
  2. Salt
  3. Base
  4. Acid

 

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