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1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following is correct mixture of azeotrope?

A
Chlorobenzene + bromobenzene
B
C$$_2$$H$$_5$$Br + C$$_2$$H$$_5$$Cl
C
C$$_6$$H$$_{14}$$ + C$$_7$$H$$_{16}$$
D
CCl$$_4$$ + CHCl$$_3$$
2
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following is correct order of their increasing boiling points?

A
10$$^{-4}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-2}$$ M NaCl > 10$$^{-4}$$ M urea.
B
10$$^{-2}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-4}$$ M NaCl > 10$$^{-4}$$ M urea.
C
10$$^{-4}$$ M urea > 10$$^{-4}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-2}$$ M NaCl >
D
10$$^{-2}$$ M NaCl > 10$$^{-3}$$ M MgCl$$_2$$ > 10$$^{-4}$$ M NaCl > 10$$^{-4}$$ M urea.
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

When KBr is dissolved in water, K$$^+$$ ions are

A
oxidised
B
reduced
C
hydrolysed
D
hydrated
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The volume of 10N and 4N HCl required to make 1 litre of 7N HCl are

A
0.75 litre of 10N HCl and 0.25 litre of 4N HCl
B
0.80 litre of 10N HCl and 0.20 litre of 4N HCl
C
0.60 litre of 10N HCl and 0.40 litre of 4N HCl
D
0.50 litre of 10N HCl and 0.50 litre of 4N HCl
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