1
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
50 mL of 0.5 M oxalic acid is needed to neutralize 25 mL of sodium hydroxide solution. The amount of NaOH in 50 mL of the given sodium hydroxide solution is -
A
20 g
B
4 g
C
80 g
D
10 g
2
JEE Main 2019 (Online) 12th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
The hardness of a water sample (in terms of equivalents of CaCO3) containing 10–3 M CaSO4 is (Molar mass of CaSO4 = 136 g mol–1)
A
90 ppm
B
100 ppm
C
50 ppm
D
10 ppm
3
JEE Main 2019 (Online) 10th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of CO2 is :
A
10
B
2
C
1
D
5
4
JEE Main 2017 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following reactions is an example of a redox reaction?
A
$$Xe{F_6}$$ + H2O $$\to$$ $$XeO{F_4}$$ + 2HF
B
$$Xe{F_6}$$ + 2H2O $$\to$$ $$XeO_2{F_2}$$ + 4HF
C
$$Xe{F_4}$$ + O2F2 $$\to$$ $$Xe{F_6}$$ + O2
D
$$Xe{F_2}$$ + PF5 $$\to$$ $${\left[ {XeF} \right]^ + }PF_6^ - $$
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