1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
The values of Ksp of CaCO3 and CaC2O4 are 4.7 $$ \times $$ 10$$-$$9 and 1.3 $$ \times $$ $$-$$9 respectively at 25oC. If the mixture of these two is washed with water, what is the concentration of Ca2+ ions in water ?
A
5.831 $$ \times $$ 10$$-$$5 M
B
6.856 $$ \times $$ 10$$-$$5 M
C
3.606 $$ \times $$ 10$$-$$5 M
D
7.746 $$ \times $$ 10$$-$$5 M
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
What is the hybridisation state of benzyl carbonium ion?

NEET 2013 (Karnataka) Chemistry - Some Basic Concepts of Organic Chemistry Question 82 English
A
sp2
B
spd2
C
sp2d
D
sp3
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
At 100oC the Kw of water is 55 times its value at 25oC. What will be the pH of neutral solution? (log 55 = 1.74)
A
7.00
B
7.87
C
5.13
D
6.13
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Change Language
Nitrogen detection in an organic compound is carried out by Lassaigne's test. The blue colour formed corresponds to which of the following formulae?
A
Fe3[Fe(CN)6]2
B
Fe4[Fe(CN)6]3
C
Fe4[Fe(CN)6]2
D
Fe3[Fe(CN)6]3