1
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
How much solid oxalic acid (Molecular weight 126) has to be weighed to prepare 100 ml. exactly 0.1 (N) oxalic acid solution in water?
2
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
$${C_6}{H_6}(liq) + {{15} \over 2}{O_2}(g) \to 6C{O_2}(g) + 3{H_2}O(liq)$$
Benzene burns in oxygen according to the above equation. What is the volume of oxygen (at STP) needed for complete combustion of 39 gram of liquid benzene?
3
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
A metal (M) forms two oxides. The ratio M:O (by weight) in the two oxides are 25:4 and 25:6. The minimum value of atomic mass of M is
4
WB JEE 2022
MCQ (Single Correct Answer)
+1
-0.25
1 mL of water has 25 drops. Let N0 be the Avogadro number. What is the number of molecules present in 1 drop of water ? (Density of water = 1 g/mL)
Questions Asked from Some Basic Concepts of Chemistry (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
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Physical Chemistry
Some Basic Concepts of Chemistry
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Radioactivity and Nuclear Chemistry
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Periodic Table
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d and f Block Elements
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