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Chemistry MCQ Questions Set-3
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1. Which of the following is not a compound?
Brass
Quick lime
Marble
Soda ash
2. Species containing same number of electrons are called
Isotopes
Isobars
Isoelectronic
Isotones
3. Which bond has the greatest ionic character?
H-F
H-Cl
H-N
H-O
4. Van der Waals equation explains the behaviour of _____
Ideal gases
Real gases
Mixture of gases
Diatomic gases
5. Which of the following is called the King of Chemicals ?
Nitric acid
Hydrochloric acid
Silver nitrate
Sulphuric acid
6. TEL minimise the knocking effect when mixed with petrol it acts as_______
Positive catalyst
Negative catalyst
Auto catalyst
Induced catalyst
7. Curdling of milk is an example of
Inversion
Denaturation
Hydrolysis
Coagulation
8. Which one of the following is an element?
Topaz
Rruby
Diamond
Sapphire
9. Which of the following acts both as oxidising and reducing agent?
nitric acid
ammonia
nitrous acid
nitrogen peroxide
10. Which metal pollute the air of a big city?
Chromium
Lead
Copper
Zinc
11. Is SiCl4 polar or nonpolar?
Polar
non polar
Both A & B
None of the above
12. An electrically charged atom or group of atoms is called
An ion
A meson
A electron
None of the above
13. In nuclear reactor the speed of neutrons is slowed down by
heavy water
ordinary water
Zinc rods
molten caustic soda
14. Which of the following is a regenerated fibre?
Terylene
Rayon
Nylon
Silk
15. The charge on positron is equal to the charge on
proton
electron
alpha- particle
neutron
16. Which gas is known as Fuel of Future ?
Methane
Oxygen
Neon
Hydrogen
17. Which of the following is not a property of water?
Low density
Low specific heat
Low heat of vaporisation
All of the above
18. Which of the following is a radioactive element
Sulphur
Polonium
Tellurium
Selenium
19. Which element has similar properties to Beryllium?
Manganese
Calcium
Both A & B
Helium
20. What is the primary component of natural gas?
Nitrogen
Ethane
Propane
Methane
21. Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of ________
Moseleys work on X-ray spectra
Braggs work on X-ray diffraction
Mullikens oil drop experiment
Discovery of X-ray by Roentgen
22. Milk is an example of a
Emulsion
Solution
Gel
Suspension
23. Cutting and peeling of onion brings tears to the eyes because of the presence of _____ ?
Amino acid
Sulfur
Carbon
Fat
24. What does one mole of H2O correspond to
16 gms
18 gms
20 gms
22 gms
25. What is the gram formula mass of Li2SO4?
101.2487
109.9446
111.2687
106.5871
26. The monomer of polythene is
ethylene
ethyl alcohol
vinyl chloride
ethanol
27. ATP stands for -
Adenosine triphosphate
Alanine triphosphate
Adrenalin triphosphate
Asparagine triphosphate
28. The maximum number of electrons that can be accommodated in a shell depends on the formula
1n2
n2
3n2
2n2
29. Blue litmus paper is converted into red in solution of _______
Acid
Base
Alkali
Salt
30. Permanent hardness of water is due to the presence of ?
Calcium sulphate
Calcium bicarbonate
Sodium bicarbonate
Magnesium bicarbonate
31. Which sample of matter is a mixture?
KBr (S)
NaCl (L)
K (S)
NaCl (Aq)
32. Which one of the following is not radioactive
Astanine
Francium
Tritium
Zirconium
33. A device used for the measurement of radioactivity is
mass spectrometer
cyclotron
nuclear reactor
G.M.counter
34. Gold and silver are extracted from their respective ores by _______
Smelting
Roasting
Leaching
Hydro metallurgy
35. Which of the following statement(s) is/are CORRECT? I. Acids are sour in taste and generate H+ ions. II. Acids are sour in taste and generate OH– ions. III. Bases are bitter intaste and generate OH– ions.
Only I and III
Only I and II
Only II and III
All I II and III
36. Which compound contains both ionic and covalent bonds?
NaNO3
CaSO4
NH4Cl
All of the above
37. Which of the following does not contain the material particles
alpha - rays
beta - rays
gamma - rays
anode rays
38. Formation of cation occurs by
gain of electron
loss of electron
gain of proton
loss of proton
39. Systematic name for (CuI)s ?
Copper Iodide
Cobalt Fluoride
Ferrous Oxide
All of the above
40. Of the following elements which one has the same oxidation state in all of its compounds?
Hydrogen
Fluroine
Carbon
oxygen
41. Gammaxene D.D.T. & Bleaching powder are important compounds of
Nitrogen
Phosphorus
Chlorine
Sulphur
42. A particle which is similar to electron is
positron
beta particle
photon
mason
43. Which of the following processes is used to remove reducible oxides from the metal?
liquation
cupellation
poling
electro refining
44. The magnetic moment (spin only) of [NiCl4]2?is
1.41 BM
1.82 BM
5.46 BM
2.82 BM
45. In photography the compound of nitrogen used is
Potassium nitrate
Silver nitrate
Ammonium carbonate
Ammonium bicarbonate
46. Choose the pure substance from the list below.
Sugar
Lemonade
Air
Sea water
47. Which compound forms a colored aqueous solution?
CrCl3
KBr
CaCl2
NaOH
48. Natural radioactivity was discovered by
Rutherford
Becquerel
Curie
Schmidt
49. Which of the following is the strongest base?
LiCH3
LiF
LiOH
LiNH2
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