1
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
$${1 \over {9.108 \times 6.023}} \times {10^8}$$
2
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
Change Language
Equal weights of ethane and hydrogen are mixed in an empty container at 25$$^\circ$$C. The fraction of total pressure exerted by hydrogen is
A
1 : 2
B
1 : 1
C
1 : 16
D
15 : 16
3
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
Change Language
The heat of neutralisation of a strong base and a strong acid is 13.7 kcal. The heat released when 0.6 mole HCl solution is added to 0.25 mole of NaOH is
A
3.425 kcal
B
8.22 kcal
C
11.645 kcal
D
13.7 kcal
4
WB JEE 2018
MCQ (Single Correct Answer)
+1
-0.33
Change Language
A compound formed by elements X and Y crystallises in the cubic structure, where X atoms are at the corners of a cube and Y atoms are at the centre of the body. The formula of the compounds is
A
XY
B
XY2
C
X2Y3
D
XY3
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