1
JEE Main 2021 (Online) 27th July Morning Shift
Numerical
+4
-1
The density of NaOH solution is 1.2 g cm$$-$$3. The molality of this solution is _____________ m. (Round off to the Nearest Integer)

[Use : Atomic mass : Na : 23.0 u, O : 16.0 u, H : 1.0 u, Density of H2O : 1.0 g cm$$-$$3]
Your input ____
2
JEE Main 2021 (Online) 25th July Evening Shift
Numerical
+4
-1
Out of Syllabus
The number of significant figures in 0.00340 is ____________.
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3
JEE Main 2021 (Online) 25th July Morning Shift
Numerical
+4
-1
When 10 mL of an aqueous solution of Fe2+ ions was titrated in the presence of dil H2SO4 using diphenylamine indicator, 15 mL of 0.02 M solution of K2Cr2O7 was required to get the end point. The molarity of the solution containing Fe2+ ions is x $$\times$$ 10$$-$$2 M. The value of x is __________. (Nearest integer)
Your input ____
4
JEE Main 2021 (Online) 25th July Morning Shift
Numerical
+4
-1
Consider the complete combustion of butane, the amount of butane utilized to produce 72.0 g of water is ___________ $$\times$$ 10$$-$$1 g. (in nearest integer)
Your input ____
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