General Science-Important Questions & Answers PDF For SSC JE,NMRC SC/TO,JMRC,CIL EXAM PART 5

1. Which of the following metals forms an amalgum with other metals ?
(A) Lead (B) Tin
(C) Zinc (D) Mercury
(Ans : D)

2. Which of the following is not an ore of Aluminium?
(A) Felsper (B) Bauxite
(C) Cryolite (D) Azurite
(Ans : D)

3. Most soluble in water is–
(A) Camphor (B) Sugar
(C) Sulphur (D) Common Salt
(Ans : B)

4. Which of the following is used as lubricant ?
(A) Graphite (B) Silica
(C) Diamond (D) Iron Oxide
(Ans : A)

5. The purest form of iron is–
(A) Steel (B) Pig iron
(C) Cast iron (D) Wrought iron
(Ans : D)

6. The percentage of carbon is the least in–
(A) Grey cast iron (B) Wrought iron
(C) White cast iron (D) Steel
(Ans : D)

7. An element that does not occur in nature but can be produced artificially is

(A) Thorium (B) Radium
(C) Plutonium (D) Uranium
(Ans : C)

8. The inert gas which is substituted for nitrogen in the air, used by deep sea
drivers for breathing is–
(A) Helium (B) Argon
(C) Krypton (D) Xenon
(Ans : A)

9. The group of metals Fe, Co, Ni may be best called as–
(A) Alkali metals (B) Rare metals
(C) Main group metals (D) Transition metals
(Ans : D)

10. Who suggested that the most of the mass of atom is located in nucleus ?
(A) Bohr (B) Thomson
(C) Rutherford (D) Avogadro
(Ans : C)

11. Meson particles are found in–
(A) R-rays (B) X-rays
(C) Laser beam (D) Cosmic rays
(Ans : D)

12. An atom of an element with mass number 23 and atomic number 11 will have–
(A) 11 neutrons, 12 protons and 11 electrons (B) 11 protons, 12 neutrons and 11
(C) 11 protons, 12 electrons and 11 neutrons (D) 23 protons and 11 electrons
(Ans : B)

13. Which of the following is a protein ?
(A) Wool (B) Starch
(C) Natural rubber (D) Cellulose
(Ans : C)

14. Soap is a mixture of sodium or potassium salts of—
(A) Monocarboxylic acid (B) Glycerols
(C) Dicarboxylic acid (D) Tricarboxylic acid
(Ans : A)

15. Which of the following material is used to prepare blue-black ink ?
(A) Gallic acid (B) Tannic acid
(C) Ferrous sulphate (D) All of these
(Ans : D)

16. Water gas is prepared by passing–
(A) Steam over white hot coke (B) Air over red hot coke
(C) Methane over red hot coke (D) Steam over heated sulphur
(Ans : A)

17. Which of the following metals react with nitrogen to form nitride ?
(A) Sodium (B) Potassium
(C) Magnesium (D) None of these
(Ans : C)

18. One micron is equal to–
(A) 1/10th of mm (B) 1/100th of mm
(C) 1/1000th of mm (D) 1/10000th of mm
(Ans : C)

19. Equal volumes of different gases at any definite temperature and pressure
(A) Equal weights (B) equal masses
(C) equal density (D) equal no. of molecules
(Ans : D)

20. Milk is an example of–
(A) suspension (B) true solution
(C) emulsion (D) gel
(Ans : C)

21. Which of the following modes of expressing concentration is independent of
(A) Molarity (B) Molality
(C) Normality (D) Formality
(Ans : B)

22. Which of the following substances undergoes chemical change on heating ?
(A) Sodium chloride (B) Silica
(C) Lead nitrate (D) Platinum wire
(Ans : C)

23. Vulcanisation is a–
(A) Science of studying volcanoes
(B) method of degrade polymers
(C) Process connected with the making of voltaic cells
(D) Process of hardening of rubber by heating it with sulphur.
(Ans : D)

24. Water gas is prepared by passing–
(A) steam over white-hot coke (B) air over red-hot coke
(C) methane over red-hot coke (D) steam over heated sulphur
(Ans : A)

25. The hormone which stimulates milk production in mammal is known as–
(A) Glucagon (B) prolactin
(C) progesterone (D) oestrogen
(Ans : B) 

1. Bromine is–
(A) colourless gas insoluble in water (B) A highly inflammable gas
(C) A Black solid. (D) A red liquid.
(Ans : D)

2. The metal used in storage batteries–
(A) Iron (B) Copper
(C) Lead (D) Zinc
(Ans : C)

3. Water has maximum density at–
(A) -4°C (B) 0°C
(C) 4°C (D) 100°C
(Ans : C)

4. The colour of Emerald is–
(A) Violet (B) Yellow
(C) Deep Green (D) Prussian Blue
(Ans : C)

5. Permanent hardness of water, due to sulphates of the metal, can be destroyed
by the use of–
(A) Nitrates (B) Zeolites
(C) Sulphonates (D) None of these
(Ans : B)

6. Rust is–
(A) A mixture of Fe2O3 and Fe(OH)2
(B) A mixture of FeO and Fe(OH)2
(C) FeO only
(D) A mixture of Fe2O3, 3H2O and FeO
(Ans : D)

7. Which of the following characters is not shown by hydrogen–
(A) It burns in air to form water (B) It supports combustion
(C) It combines with almost all metals forming hydrides (D) It readily combines
with fluorine and chlorine
(Ans : B)

8. Which of the following elements is obtained from sea weeds ?
(A) Argon (B) Sulphur
(C) Vanadium (D) Iodine
(Ans : D)

9. The metallic constituents of hard water are–
(A) Magnesium, Calcium and tin (B) Iron, tin and calcium
(C) Calcium, magnesium and iron (D) Magnesium, tin and iron
(Ans : C)

10. The location and energy of an electron in an atom can be specified by–
(A) Atomic mass (B) Atomic number
(C) Quantum numbers (D) None of these
(Ans : C)

11. Old-written material, which cannot be read easily can be read by–
(A) Cosmic Rays (B) Ultraviolet rays
(C) Infra Red rays (D) None of these
(Ans : C)

12. In an atomic nucleus, neutrons and protons are held together by–
(A) Gravitational forces (B) Magnetic forces
(C) Exchange forces (D) Coulombic forces
(Ans : C)

13. The type of glass used in making prisms and lenses is–
(A) Soft glass (B) Pyrex glass
(C) Jena glass (D) Flint glass
(Ans : D)

14. Carbon tetrachloride fire extinguisher should not be used in closed room
because it produces poisonous glass called–
(A) Carbon Monoxide (B) Phosphine
(C) Phosgene (D) None of these
(Ans : D)

15. Which of the following is commonly called a polyamide ?
(A) Rayon (B) Orion
(C) Terylene (D) Nylon
(Ans : D)

16. Hydrometer is an instrument–
(A) For measuring sound in water (B) To detect the presence of hydrogen in the
(C) For measuring the specific gravity of liquids (D) To detect the changes in
atmospheric humidity
(Ans : C)

17. Which thermometer is used to indicate the lowest temperature ?
(A) Clinical thermometer (B) Gas thermometer
(C) Alcohol thermometer (D) Resistance thermometer
(Ans : C)

18. A chronometer measures–
(A) Sound waves (B) Time
(C) Water waves (D) Colour contrast
(Ans : B)

19. If temperature is kept constant during the reaction the process is called–
(A) Adiabatic (B) Isobaric
(C) Isochoric (D) Isothermal
(Ans : D)

20. Cholera is caused by–
(A) vibrio cholerae (B) salmonella
(C) bacterioceoccurs (D) None of these(Ans : A)

21. Why do colloidal substance do not deposited below ?
(A) Specific gravity is less (B) It is of very less amount in respect of solvent
(C) They carry electrical charges (D) They are converted to sovent
(Ans : A)

22. Which of the following gases is obtained by the reaction of water with
calcium carbide–
(A) Acetylene (B) Ethylene
(C) Methane (D) Water gas
(Ans : A)

23. Cooking oil can be converted into vegetable ghee by the process of–
(A) oxidation (B) hydrogenation
(C) distillation (D) crystalisation
(Ans : B)

24. The contact process is involved in the manufacture of–
(A) nitric acid (B) Sulphuric acid
(C) Ammonia (D) Caustic soda
(Ans : B)

25. Antidiuretic hormone (ADH)–
(A) inhibits the secretion of growth hormone by the pituitary
(B) inhibits the rate of heart beat
(C) causes the muscular walls of the arterioles to contract that simulates the
reabsorption of water from the kidney tubules.
(D) causes an increase in the blood pressure
(Ans : C)

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General Science-Important Questions & Answers PDF For SSC JE,NMRC SC/TO,JMRC,CIL EXAM PART 4

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