Chemistry Solved Questions and Answers Set 6

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Q.1:- Which of the following electromagnetic wave has the longest wave length ?

  1. Infrared Rays
  2. Gamma Rays
  3. Light Rays
  4. Ultra Violet Rays

Q.2:- Whose experiment proved that the speed of light was always the same ?

  1. James Clark Maxwell
  2. Michelson and Morley
  3. Miller and Stanley
  4. Werner Heisenberg

Q.3:- The Alpha particles carries two positive charges. Its mass is very nearly equal to that of ?

  1. Two protons
  2. An atom of Helium
  3. Sum of masses of two positron and two neutrons
  4. Two positron as each positron carries a single positive charge

Q.4:- An aqueous solution of Copper Sulphate is acidic in nature because the salt undergoes ?

  1. Dialysis
  2. Electrolysis
  3. Hydrolysis
  4. Photolysis

Q.5:- The purpose of smelting an ore to ?

  1. Reduce it
  2. Oxide it
  3. Obtain an alloy
  4. Separate volatile impurities

Q.6:- The formation of colloid from suspension is ?

  1. Peptisation
  2. Condensation
  3. Sedimentation
  4. None of these

Q.7:- Milk is an example of ?

  1. Oil in water emulsion
  2. Water in oil emulsion
  3. Fat in oil emulsion
  4. Fat in water emulsion

Q.8:- A colloid always has ?

  1. Two phases
  2. True solution
  3. Three phases
  4. Solute particles in water

Q.9:- The atomic orbital is ?

  1. The circular path of the electron
  2. Elliptical shaped orbit
  3. Three dimensional field around nucleus
  4. The region in which there is maximum probability of finding electron
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Q.10:- The three basic components of an atom are ?

  1. Protons, Neutrons and Ions
  2. Protons, Neutrons and Electrons
  3. Protium, Deuterium and Tritium
  4. Protons, Neutrons and Ions

Q.11:- In a given atom, no two electrons can have the same value for all the four quantum number. This is called ?

  1. Hund’s Rule
  2. Pauli’s exclusion principle
  3. Uncertainty principle
  4. Aufbau’s principle

Q.12:- The concept of dual nature of radiation was proposed by ?

  1. Max Planck
  2. De-Broglie
  3. Heisenberg
  4. Pauling

Q.13:- The total number of orbitals in principal shell is ?

  1. n2
  2. n
  3. 2n2
  4. 3n2

Q.14:- The activity or radioisotope change with ?

  1. Temperature
  2. Pressure
  3. Chemical Environment
  4. None of these

Q.15:- Species containing same number of electrons are called ?

  1. Isotopes
  2. Isobars
  3. Isoelectronic
  4. Isotones

Q.16:- Wavelength of which of the following colours of the visible spectrum of light are maximally absorbed by green plants ?

  1. Green and Yellow
  2. Red and Blue
  3. Green and Red
  4. Blue and Yellow

Q.17:- The photoelectric effect is described as the ejection of electrons from the surface of a metal when ?

  1. It is heated
  2. It is placed in strong electric field
  3. Electrons of suitable velocity impinge on it
  4. Light of suitable wavelength falls on it

Q.18:- Meson was discovered by ?

  1. Powell
  2. Seaburg
  3. Anderson
  4. Yukawa
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Q.19:- Which one is not the isotopes of Hydrogen ?

  1. Protium
  2. Eritium
  3. Deuterium
  4. Tritium

Q.20:- A redox reaction is ?

  1. Proton transfer reaction
  2. Ion combination reaction
  3. A reaction is solution
  4. Electron transfer reaction

Q.21:- Starch Iodide paper is used to test for the presence of ?

  1. Iodine
  2. Iodide Iron
  3. Oxidising Agent
  4. Reducing Agent

Q.22:- An acid is a substance which ?

  1. Donates a proton
  2. Accepts an electron
  3. Give H+ in water
  4. All

Q.23:- Uric acid is present in ?

  1. Soda Water
  2. Rancid Butter
  3. Sour Milk
  4. Urine of Mammals

Q.24:- A gas expands isothermally and reversibly. The work done by the gas is ?

  1. Zero
  2. Maximum
  3. Minimum
  4. Cannot be determined

Q.25:- The biocatalysts are ?

  1. Enzymes
  2. Minerals
  3. Plants
  4. All Proteins


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