1
WB JEE 2020
MCQ (Single Correct Answer)
+1
-0.25
Change Language
What will be the mass of one atom of 12C?
A
1 amu
B
1.9923 $$ \times $$ 10-23g
C
1.6603 $$ \times $$ 10-22g
D
6 amu
2
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
In the crystalline solid MSO4 . nH2O of molar mass 250 g mol$$-$$1, the percentage of anhydrous salt is 64 by weight. The value of n is
A
2
B
3
C
5
D
7
3
WB JEE 2019
MCQ (Single Correct Answer)
+1
-0.33
Change Language
At S.T.P. the volume of 7.5 g of a gas is 5.6 L. The gas is
A
NO
B
N2O
C
CO
D
CO2
4
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
Change Language
How many moles of electrons will weigh one kilogram?
A
6.023 $$\times$$ 1023
B
$${1 \over {9.108}} \times {10^{31}}$$
C
$${{6.023} \over {9.108}} \times {10^{54}}$$
D
$${1 \over {9.108 \times 6.023}} \times {10^8}$$
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Graduate Aptitude Test in Engineering
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Class 12