Select Board & Class
describe binary fission in ameoba
An iron nail was kept immersed in aluminum sulphate solution. After about an hour, it was observed that (a) The colourless solution changes to light green. (b) The solution becomes warm. (c) Grey metal is deposited on the iron nail. (d) The solution remains colorless and no deposition is observed on iron nail.
what is the ph of dilute acetic acid?
a student takes Na2Co3 powder in a test tube and purs some drop of acetic acid over it.
He observes
a) no reaction in the test tube
b) colourless gas with pungent smell
c) bulbbles of colourless and odourless gas
d) white fumes with smell of vinegar
why we should use freshly prepared lime water......
//////????
a student is asked to add a teaspoon full of solid sodium bicarbonate to a test tube containing 3 ml acetic acid. He observes that, the solid sodium bicarbonate
a) floats on the surface of acetic acid
b) Remains suspended in the acetic acid
c) settles down in the test tube
d)reacts with acetic acid and a clear solution is obtained
the precautions "do not smell acetic acid directly." but in the video, the person does just that. what is the right way of doing it????
amount of 5mL each of acetic acid and water are mixed together and shaken well. The resulting mixture would appear as?
Precautions -Do not inhale vapours of pure acetic acid. Handle it carefully.
then how are we supposed to smell it?
Which of the following is not a soap ?
(a)Sodium Palmitate (b)Sodium stearate (c)SodiumMysterate (d)Sodium Acetate.
WHY???
30.
in saponification reaction sodium chloride is added to : (A)initiate the reaction (B)precipitate the soap (C) minimize side reaction (D)separate by products
will u plz give a experiment to explain the esterification reaction and how esters are formed.
is ch3cooNa soluble in water?
It is written in the pracautions to not directly smell the acetic acid. Then how do we do it?
Acetic acid is
1. Soluble only in boiling water
2. Soluble in water at room temperature
3. Partially soluble in water
4. Insoluble in water
Choose the correct answer.
IS MEANING OF INFERENCE & PROCEDURE SAME? ANSWER SOON.
a student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it.He observes : (A)no reaction in test tube (B) colourless gas with pungent smell. (C)bubbles of a colourless and odourless gas (D) white fumes with smell of vinegar.
What happens when 2ml aetic acid is added to 2ml of water in a test tube ?!
a) a clear and transparent solution is formed ?!b)a white precipitate is formed alomostly immediately ?!c)two separate layers are formed !?d) a colorless and odourless gas is evolved ?! pleaseee answer this question ! i've got my boards in a week !!
What is the formula for acetic acid and what are the products when ester undergoes saponification ??
why shouldn't one smell acetic acid directly?
and why is it important to use freshly prepared limewater only during cnfirmation of C02?
if we cannot smell the acetic acid then how will we do the experiment...............??
the temperature of reaction mixture on adding sodium hydroxide with oil (A) decreases (B)increases (C)remains same (D)decreases appreciably.
does there are other properties of acetic acid
NaOH is colourless or not ?
a mixture of water and acetic acid can be separated;(a)can be separated by using a separating funnel.(b)cab be separated by using a centrifuge(c)can be separated by filtration(d)can not be separated by any method.
acetic acid was Added to asolid X kept in test tube
Acolourless odourless gas Y was evolved.
The gas was passed through lime water which turned milky
It was concluded that
Solid X is sodium bicarbonate and y is co2
Is this right
A STUDENT MIXED SOME ACETIC ACID WITH WATER. HE WOULD HAVE OBSERVED THE SOLUTION FORMED AS....
1. GREEN AND TRANSPARENT
2. PINK AND OPAQUE
3. YELLOW AND TRANSPARENT
4. COLOURLESS AND TRANSPARENT
Take a few ml of water in a test tube and add acetic acid to it.Shake it well.What are the observations and Inference you get?
About 2mL of acetic acid was taken in each of the three test tubes P, Q and R and 5mL, 10mL and 15mL of distilled water were added to them respectively. Instantaneously a clear solution is observed in the test tubes :
can we download freely in our computer?
why are we using sodium bicarbonate for the reaction....?
in a substitution reaction whn we react chlorine gas wit methane wht color wood be seen
Assessment of Practical Skills in Science -Class 10-CBSEpublication
what is the basic difference between displacement reaction and substituition reaction
what is the suffix in da wordकेंद्रित ? big e or small e?
what will happen if we pass hydrogen to limewater and carbon-di-oxide to burning splinter?
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)
Syllabus
describe binary fission in ameoba
An iron nail was kept immersed in aluminum sulphate solution. After about an hour, it was observed that (a) The colourless solution changes to light green. (b) The solution becomes warm. (c) Grey metal is deposited on the iron nail. (d) The solution remains colorless and no deposition is observed on iron nail.
what is the ph of dilute acetic acid?
a student takes Na2Co3 powder in a test tube and purs some drop of acetic acid over it.
He observes
a) no reaction in the test tube
b) colourless gas with pungent smell
c) bulbbles of colourless and odourless gas
d) white fumes with smell of vinegar
A) colour of the mixture has become dark brown
B) A brisk effervescence is taking place in the beaker
C) The outer surface of the beaker has become hot
D) The outer surface of the beaker has become cold
why we should use freshly prepared lime water......
//////????
a student is asked to add a teaspoon full of solid sodium bicarbonate to a test tube containing 3 ml acetic acid. He observes that, the solid sodium bicarbonate
a) floats on the surface of acetic acid
b) Remains suspended in the acetic acid
c) settles down in the test tube
d)reacts with acetic acid and a clear solution is obtained
the precautions "do not smell acetic acid directly." but in the video, the person does just that. what is the right way of doing it????
about 3 mL of ethanoic acid in a dry test tube. He adds an equal amount
of distilled water to it and shakes the test tube well. After some time he
is likely to observe that
(A) a colloid is formed in the test tube.
(B) the ethanoic acid dissolves readily in water.
(C) the solution becomes light orange.
(D) water floats over the surface of ethanoic acid.
amount of 5mL each of acetic acid and water are mixed together and shaken well. The resulting mixture would appear as?
Precautions -Do not inhale vapours of pure acetic acid. Handle it carefully.
then how are we supposed to smell it?
Which of the following is not a soap ?
(a)Sodium Palmitate (b)Sodium stearate (c)SodiumMysterate (d)Sodium Acetate.
WHY???
30.
in saponification reaction sodium chloride is added to : (A)initiate the reaction (B)precipitate the soap (C) minimize side reaction (D)separate by products
will u plz give a experiment to explain the esterification reaction and how esters are formed.
1) I and II 2) I and III 3) II and III 4) II and IV
Explain the reason for your answer.
is ch3cooNa soluble in water?
It is written in the pracautions to not directly smell the acetic acid. Then how do we do it?
Acetic acid is
1. Soluble only in boiling water
2. Soluble in water at room temperature
3. Partially soluble in water
4. Insoluble in water
Choose the correct answer.
IS MEANING OF INFERENCE & PROCEDURE SAME? ANSWER SOON.
a student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it.He observes : (A)no reaction in test tube (B) colourless gas with pungent smell. (C)bubbles of a colourless and odourless gas (D) white fumes with smell of vinegar.
a)needle shaped crystal
b)white beads
c)white pellets or flakes
d)fine powder
What happens when 2ml aetic acid is added to 2ml of water in a test tube ?!
a) a clear and transparent solution is formed ?!
b)a white precipitate is formed alomostly immediately ?!
c)two separate layers are formed !?
d) a colorless and odourless gas is evolved ?!
pleaseee answer this question ! i've got my boards in a week !!
What is the formula for acetic acid and what are the products when ester undergoes saponification ??
why shouldn't one smell acetic acid directly?
and why is it important to use freshly prepared limewater only during cnfirmation of C02?
if we cannot smell the acetic acid then how will we do the experiment...............??
what are the ions formed when we put acetic acid in water,
25. On adding concentrated NaOH solution to a test tube containing phenolphthalein, the colour change observed by a student would be : A. Pink to colourless B. Pink to blue C. colourless to pink D. Red to blue
the temperature of reaction mixture on adding sodium hydroxide with oil (A) decreases (B)increases (C)remains same (D)decreases appreciably.
does there are other properties of acetic acid
NaOH is colourless or not ?
1.colloidal solution is formed
2.a suspension is formed
3. homogenous mixture is formed
4.heterogenous mixture is formed
a mixture of water and acetic acid can be separated;(a)can be separated by using a separating funnel.(b)cab be separated by using a centrifuge(c)can be separated by filtration(d)can not be separated by any method.
acetic acid was Added to asolid X kept in test tube
Acolourless odourless gas Y was evolved.
The gas was passed through lime water which turned milky
It was concluded that
Solid X is sodium bicarbonate and y is co2
Is this right
it yes?
How ?
A STUDENT MIXED SOME ACETIC ACID WITH WATER. HE WOULD HAVE OBSERVED THE SOLUTION FORMED AS....
1. GREEN AND TRANSPARENT
2. PINK AND OPAQUE
3. YELLOW AND TRANSPARENT
4. COLOURLESS AND TRANSPARENT
Take a few ml of water in a test tube and add acetic acid to it.Shake it well.What are the observations and Inference you get?
About 2mL of acetic acid was taken in each of the three test tubes P, Q and R and 5mL, 10mL and 15mL of distilled water were added to them respectively. Instantaneously a clear solution is observed in the test tubes :
can we download freely in our computer?
why are we using sodium bicarbonate for the reaction....?
in a substitution reaction whn we react chlorine gas wit methane wht color wood be seen
Assessment of Practical Skills in Science -Class 10-CBSEpublication
what is the basic difference between displacement reaction and substituition reaction
what is the suffix in da wordकेंद्रित ? big e or small e?
what will happen if we pass hydrogen to limewater and carbon-di-oxide to burning splinter?