Chemistry Solved Questions and Answers Set 5

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Q.1:- Regarding the atom of a chemical element, the magnetic quantum number refers to ?

  1. Orientation
  2. Shape
  3. Size
  4. Spin

Q.2:- Molten NaCl (Sodium Chloride) is good conductor of electricity is due to ?

  1. Free Electron
  2. Free Ions
  3. Free Molecules
  4. None

Q.3:- A radioactive substance emits ?

  1. Alpha particles
  2. Beta particles
  3. Gamma particles
  4. All of the three

Q.4:- When a helium atom loses an electron it becomes ?

  1. A negative helium ion
  2. An alpha particle
  3. A positive helium ion
  4. A proton

Q.5:- Misch metal is widely used in the manufacture of which of the following ?

  1. Material of car brake
  2. Smoke detectors
  3. Cigarette Lighters
  4. Emergency Light

Q.6:- Which of the following Alkaline Earth Metals forms covalent compounds ?

  1. Magnesium
  2. Calcium
  3. Barium
  4. Beryllium

Q.7:- According to kinetic theory of gases ?

  1. There are intermolecular attractions
  2. Molecule have considerable volume
  3. There is no intermolecular attraction
  4. Speed of molecules decreases of each collision

Q.8:- Hydrochloric acid is also known as ?

  1. Galic acid
  2. Picric acid
  3. Muriatic acid
  4. Chloric acid

Q.9:- Curd is sour due to presence of ?

  1. Citric Acid
  2. Lactic Acid
  3. Acetic Acid
  4. None of these

Q.10:- Aluminium Oxide is a / an ?

  1. Basic Oxide
  2. Neutral Oxide
  3. Amphoteric
  4. Acid Oxide

Q.11:- The name catalysis was given by ?

  1. Rutherford
  2. Langmuir
  3. Grahm
  4. Berzelius

Q.12:- The long form of periodic table was developed by ?

  1. Bohr
  2. Menedeleev
  3. Range and Werner
  4. Rutherford
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Q.13:- Iron rusts in the presence of ?

  1. Vacuum
  2. Moisture
  3. Oxygen
  4. Both (b) & (c)

Q.14:- Dialysis can separate which of the following in addition to the glucose from human blood ?

  1. Fructose
  2. Starch
  3. Protein
  4. Sucrose

Q.15:- Which method is used for the purification of Bauxite ore ?

  1. Magnetic separation
  2. Electrolysis
  3. Leaching
  4. Levigation

Q.16:- Gold and Silver are extracted from their respective ores by ?

  1. Smelting
  2. Roasting
  3. Leaching
  4. Hydro Metallurgy

Q.17:- Aluminium surface are often “Anodized”. This means the deposition of a layer of ?

  1. Chrominium Oxide
  2. Aluminium Oxide
  3. Nickel Oxide
  4. Zinc Oxide

Q.18:- The soft silvery metallic element which ionizes easily when heated or exposed to light and is present in atomic clock is ?

  1. Califonrium
  2. Calcium
  3. Cerium
  4. Cesium

Q.19:- Potassium Nitrate is used in the production of ?

  1. Health Drinks
  2. Fertilizer
  3. Synthetic Textiles
  4. None of these

Q.20:- The substance used as an activator in froth floatation process is ?

  1. Pine Oil
  2. Potassium Ethyl Xanthate
  3. Copper Sulphate
  4. Sodium Cyanide

Q.21:- Which of the following method is used to purify Tin ?

  1. Poling
  2. Electrolytic Refining
  3. Liquation
  4. All of these

Q.22:- Which of the following metals has least melting point ?

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

Q.23:- The most common actinide is ?

  1. Thorium
  2. Europium
  3. Lanthanum
  4. Samarium
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Q.24:- Diamond is an allotropic form of ?

  1. Germanium
  2. Carbon
  3. Silicon
  4. Sulphur

Q.25:- Chemically vermillion is ?

  1. Calcium Carbonate
  2. Potassium Nitrate
  3. Potassium Sulphide
  4. Mercury (II) Sulphide
  5. None of the above

 

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