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Chemistry MCQ Questions Set-10
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1. Which is a compound that contains carbon?
Ethane
Propane
Methane
All of the above
2. The mass number of an isotope of an element is 298. If its nucleus has 189 neutrons, what is its atomic number?
298
189
109
487
3. which of the following molecule contains a nonpolar covalent bond?
Br2
CO2
CCl4
CO
4. Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?
Desmosome
Ribosome
Lysosome
Vacuoles
5. Barbituric Acid was synthesized in 1864 by
Adolf von Baeyer
Marie Curie
Mendeleev
John Dalton
6. Which of the following statements is not true?
Bacteria present in the mouth produce acids by degradation of sugar and food particles remaining in the mouth.
When pH of the mouth is higher than 5.5. then tooth decay starts.
Tooth enamel made of calcium phosphate is the hardest substance in the body.
Using toothpaste, which are generally basic, helps neutralise the excess acid and prevent tooth decay.
7. Which of the following is not a type of chemical weathering?
Corrosion
Solution
Oxidation
Carbonation
8. What two elements are used to make bronze?
Lead and copper
copper and tin
Tin and lead
copper and iron
9. The principal quantum number indicates what property of an electron?
energy of electron
distance of electron from nucleus
both a & b
number of subshells
10. The first two steps in the lithification process are
Cementation and Proposal
Compaction and Ratification
Compaction and Cementation
Ratification and Cementation
11. Monazite is an ore of
Platinum
Radium
Uranium
Lanthanum
12. Group 7A of the periodic table contains the
most reactive metals
least reactive non metals
most reactive non metals
least reactive metals
13. The chemical makeup of a rock is
Nutrients
Minerals
Metals
Water
14. Plaster of Paris ______. I. changes into gypsum on mixing with water II. is CaSO4.2H2O III. is used for decoration
Only I and II
Only I and III
Only II and III
All I, II and III
15. Which best describes the nucleus of an atom?
It is the densest part of the atom
It has neutrons
It has protons
All of the above
16. Theory of Evolution tells us how life evolved from simple to more complex forms
Darwins
Wallace
Mendel's
Lamarck's
17. How many carbon and hydrogen atoms are there in Propane, respectively?
2, 4
2, 6
4, 7
3, 8
18. Which of the following has the highest melting and boiling point?
Lithium
Phosphorous
Carbon
Argon
19. Which process is a chemical change?
Burning gasoline
Boiling water
Evaporating water
Melting ice
20. Atoms of the same element can differ in
Atomic number
Atomic mass
electrons
None of the above
21. Synthetic detergents are prepared from
potassium salts of higher fattyacids
sodium salts of higher fattyacids
hydrocarbons of petroleum
glycerides
22. Non metal found in liquid state?
Chlorine
Bromine
Fluorine
Iodine
23. Which one of the following is commonly used as an indicator to measure the exact pH?
Eosin
Phenolphthalein
Universal indicator
Litmus
24. Which among the following is false about acids?
They give H+ ions in aqueous solution
Most acids contain hydrogen
They turn blue litmus red
They are bad conductor of electricity in aqueous solution
25. The mass of one molecule of oxygen is
2.3 x 10-23 g
3.3 x 10-23 g
4.3 x 10-23 g
5.3 x 10-23 g
26. Alkali metals can
be highly unstable at room temperature
vaporize at room temperature
easily gain electrons
easily lose electrons
27. Which of the following has the highest boiling point?
2,3-dimethylbutane
2-methylpentane
2,2-dimethylbutane
1,2-methylpentane
28. Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (fc)?
These are two independent temperature scales
T = tc
T = tc - 273.15
T = tc + 273.15
29. Atoms of same element having different mass numbers are called__________
Isobars
Isotopes
Isotones
Isomers
30. The complexity and variety of organic molecules is due to
their interaction with water
their tremendously large sizes
the chemical versatility of carbon atoms
the variety of rare elements in organic molecules
31. A change in which one or more new substances are formed is called _________.
Physical Change
Chemical Change
Rusting
Galvanisation
32. Covalent bonds are formed when electrons are
Transfer of electrons
Sharing of electrons
Dividing of electrons
All of the above
33. The movement of water molecules through the plasma membrane is called ______.
Osmosis
Sedimentation
Precipitation
Transpiration
34. Which of the following has largest atomic radius?
Li
Be
B
O
35. Which chemical is present in the cells of cork of tree which makes them impervious to gases and water
Cellulose
Suberin
Pectin
Lignin
36. reaction occurs when sodium sulphate reacts with barium chloride
Single combination
Single displacement
Double displacement
Double combination
37. In the modern periodic table. periods ............ and ........ contain Lanthanoides and Actinoides.
3 and 4
6 and 7
4 and 5
5 and 6
38. Which of the following molecules is joined by a double covalent bond?
Cl2
O2
N2
He2
39. Turquoise is an ore/mineral of
Copper
Manganese
Mercury
Tin
40. What happens to electrons in an ionic bond?
collision of electrons
Sharing of electrons
Both A & B
Transfer of electrons
41. Carbon dioxide is one of the gases that cause the _________.
greenhouse effect
ozonification
oven phenomenon
sunburn
42. Which element is not a part of a nitrogenous base?
Carbon
Oxygen
Phosphorous
Nitrogen
43. Adding which substance gives blue colour to glass?
Manganese oxide
Cobalt oxide
Chromium oxide
Iron oxide
44. All atoms of the same element have the same
number of protons
number of electrons
atomic number
All of the above
45. When Granite rocks get metamorphosed, they form
Quartzite
Gneiss
Marble
Slate
46. Which of the following gases is not generated in a biogas plant?
H2S
CO2
CH4
CO
47. Which metal is responsible for Itai-Itai disease?
Cadmium
Nickel
Chromium
Mercury
48. Which of the following is an ore of Aluminium?
Galena
Cryollite
Cinnabar
Epsom Salt
49. One turn of the citric acid cycle produces
two molecules of carbon dioxide are released
three molecules of NADH and one molecule of FADH2 are generated
one molecule of ATP or GTP is produced
All of the above
50. In general the largest component of bog soils is
organic matter
water
living organisms
air
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