A solution turned pink when a drop of phenolphthalein was added to it. The probable pH .of that solution is
A) 5
B) 6
C) 7
D) 10
1 Answers
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In an oil drop experiment, the distance between the capacitor plates = 0.076 m, the p.d. between the plates = 5000 V and the radius of drop = `2.75 xx
Correct Answer - `1.6 xx 10^(-19)` coulomb
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10g sample of bleaching powder was dissolved into water to make the solution one litre. To this solution 35 mL of 1.0 M Mohr salt solution was added c
Correct Answer - 0.071
2 Answers 3 views
Water drops are falling from a tip at regular time intervals. When the fifth drop is near to fall from tap the first drop is at ground. If the top is
Correct Answer - (i)`(7)/(16)H` (ii)`(5)/(16)H` (iii)`sqrt((Gh)/(2))`
2 Answers 1 views
A cricket ball of mass 150 g moving with a velocity of 12 m/s is turned back with a velocity of 20 m/s on hitting the bat.
m = 0.150 kg, v = 20 m/s, u = -12 m/s and t = 0.01 s To find: Average force (F) Formula: F = \(\frac{m(v-u)}{t}\) Calculation: From formula, F = \(\frac{0.150[20-(-12)]}{0.01}\) = 480 N The average force exerted...
2 Answers 2 views
During 1991-2001 there were 67 million people added in the urban population, 40 million were added due to natural growth.
Correct option is B) 60%
2 Answers 1 views
The colour of phenolphthalein indicator in basic solution is ………………….
Correct option is C) pink
2 Answers 1 views
Phenolphthalein indicator gets pink colour with
B) NaOH solution
2 Answers 1 views
Before the adoption of the Quit India Resolution, the Indian National Congress turned down the proposal of
Correct option is D) Atlee
2 Answers 2 views
When air is blown from mouth into a test tube containing lime water, the lime water turned milky.
(D) Carbon dioxide
2 Answers 1 views
You are doing experiments on diffusion in your lab. Find the substance which turns into pink colour when added to water.
C) Potassium permanganate
2 Answers 1 views