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NEET
NEET Chemistry MCQ
Mcq On Some Basic Concepts Of Chemistry
Quiz 3
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Q.1
Which of the following statements about a compound is incorrect?
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A molecule of a compound has atoms of different elements.
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The ratio of atoms of different elements in a compound is fixed.
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A compound retains the physical properties of its constituent elements.
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A compound cannot be separated into its constituent elements by physical methods of separation.
Q.2
Weight of one atom of an element is $6.644 \times 10^{-23} \ g $. Calculate g-atom of elements in 40 kg
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$10^4 \ g-atom$
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$10^3 \ g-atom$
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$10^5 \ g-atom$
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$10^2 \ g-atom$
Q.3
How many gram of concentrated hydrochloric acid containing 37.9% HCl by weight will contain 6 g of HCl?
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15.84 g
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14.1 g
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13.6 g
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11.2 g
Q.4
The volume of 1.0 g of hydrogen in litres at N.T.P is
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11.2
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2.24
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22.4
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1.12
Q.5
The unit of Molar mass is
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gm/moles
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None of the these
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moles/gm
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g moles
Q.6
The sum of the mole fraction of all the components in a solution is
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0
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None of the above
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-1
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1
Q.7
If 500 mL of a 5M solution is diluted to 2500 mL, what will be the molarity of the solution obtained
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1.59 M
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0.017 M
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1.0 M
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1.66 M
Q.8
If 20.0 mL of 1 M CaCl2 and 60 mL of .200 M CaCl2 are mixed, the molarity of the final solution will be
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.8 M
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.1 M
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.5 M
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.4 M
Q.9
Which of the following statements indicates that law of multiple proportion is being followed
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When magnesium burns in oxygen, the amount of magnesium taken for the reaction is equal to the amount of magnesium in magnesium oxide formed
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Sample of carbon dioxide taken from any source will always have carbon and oxygen in the ratio 1:2.
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Carbon forms two oxides namely CO2 and CO, where masses of oxygen which combine with fixed mass of carbon are in the simple ratio 2:1.
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At constant temperature and pressure 200 mL of hydrogen will combine with 100 mL oxygen to produce 200 mL of water vapour.
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