Physics-
General
Easy
Question
A fish is a little away below the surface of a lake. If the critical angle is 
, then the fish could see things above the water surface within an angular range of 
where
The correct answer is:
From figure given in question 
Related Questions to study
physics-
A ray of light passes through four transparent media with refractive indices 
as shown in the figure. The surfaces of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have
A ray of light passes through four transparent media with refractive indices as shown in the figure. The surfaces of all media are parallel. If the emergent ray CD is parallel to the incident ray AB, we must have
physics-General
chemistry-
The acidic character of 
alcohols, 
and 
is of the order
The acidic character of alcohols, and is of the order
chemistry-General
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Ethanol is more soluble in water but ether is less soluble because:
Ethanol is more soluble in water but ether is less soluble because:
chemistry-General
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How many structural isomers are known for 
How many structural isomers are known for
chemistry-General
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Methanol and ethanol can be distinguished by the following:
Methanol and ethanol can be distinguished by the following:
chemistry-General
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An alcohol on alk. 
oxidation gives first acetone and on further oxidation acetic acid. It is:
An alcohol on alk. oxidation gives first acetone and on further oxidation acetic acid. It is:
chemistry-General
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The alcohol that produces turbidity immediately with 
at room temperature
The alcohol that produces turbidity immediately with at room temperature
chemistry-General
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The conversion of m-nitrophenol to resorcinol involves respectively
The conversion of m-nitrophenol to resorcinol involves respectively
chemistry-General
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At 530 K, glycerol reacts with oxalic acid to produce
At 530 K, glycerol reacts with oxalic acid to produce
chemistry-General
chemistry-
The following reaction is known as 
The following reaction is known as
chemistry-General
chemistry-
On heating glycerol with conc.
a compound is obtained which has bad odour. The compound is:
On heating glycerol with conc. a compound is obtained which has bad odour. The compound is:
chemistry-General
chemistry-
On conversion into the Grignard reagent followed by treatment with absolute ethanol, how many isomeric alkyl chlorides would yield 2-methylbutane?
On conversion into the Grignard reagent followed by treatment with absolute ethanol, how many isomeric alkyl chlorides would yield 2-methylbutane?
chemistry-General
chemistry-
What is formed when glycerol reacts with excess of HI?
What is formed when glycerol reacts with excess of HI?
chemistry-General
chemistry-
General formula for alcohols is:
General formula for alcohols is:
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Which of the following compounds is weakest acid?
Which of the following compounds is weakest acid?
chemistry-General
