Physics-
General
Easy
Question
An ideal monoatomic gas is carried around the cycle ABCDA as shown in the figure. The efficiency of the gas cycle is :
- 4/21
- 2/21
- 4/31
- 2/31
The correct answer is: 4/21
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physics-
The following graphs shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. speed of the molecules at temperatures T1 and T2 is
The following graphs shows two isotherms for a fixed mass of an ideal gas. The ratio of r.m.s. speed of the molecules at temperatures T1 and T2 is
physics-General
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A hydrocarbon of formula 
absorbs only one molecule of H2 upon catalytic hydrogenation. Upon ozonolys is, the hydrocarbon yields.
The hydrocarbon is
A hydrocarbon of formula absorbs only one molecule of H2 upon catalytic hydrogenation. Upon ozonolys is, the hydrocarbon yields.
The hydrocarbon is
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A volume (V)-temperature (T) diagram was obtained when a given mass of gas was heated. During the heating process from state 1 to state 2, the pressure :
A volume (V)-temperature (T) diagram was obtained when a given mass of gas was heated. During the heating process from state 1 to state 2, the pressure :
physics-General
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The distribution of relative intensity I(l) of blackbody radiation from a solid body versus the wavelength l is shown in the figure. If the Wien displacement law constant is 
m K, what is the approximate temperature of the object?
The distribution of relative intensity I(l) of blackbody radiation from a solid body versus the wavelength l is shown in the figure. If the Wien displacement law constant is m K, what is the approximate temperature of the object?
physics-General
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Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
If x has the value calculated in above question. Then temperature of junction b or d is:
Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 200°C and 0°C respectively.
If x has the value calculated in above question. Then temperature of junction b or d is:
physics-General
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Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures 
C and 
C respectively.
For what cross-section x of rod dc there will be no heat flow through rod bd.
Five rods of same material and same length are joined as shown. Cross-section of rods ab, ad and bc are A, 2A and 3A respectively. Ends a and c are maintained at temperatures C and C respectively.
For what cross-section x of rod dc there will be no heat flow through rod bd.
physics-General
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In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The block is now divided into two blocks (with M1 + M2 = M) and the apparatus is rearranged as shown in figure b. If the speeds of transverse waves in the two strings are equal the values of M1 and M2 will be respectively
In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The block is now divided into two blocks (with M1 + M2 = M) and the apparatus is rearranged as shown in figure b. If the speeds of transverse waves in the two strings are equal the values of M1 and M2 will be respectively
physics-General
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In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The ratio of speeds of transverse wave in the string 1 to that of string 2 is
In figure a, string 1 has a linear mass density of 3 g/m, and string 2 has a linear mass density of 4.5 g/m. They are under tension due to the hanging block of mass M = 500 g as shown in figure (a)
The ratio of speeds of transverse wave in the string 1 to that of string 2 is
physics-General
chemistry-
The product of following reaction is 
The product of following reaction is
chemistry-General
chemistry-
The order of reactivity of the following alkenes towards electrophilic attack is
i)
ii)
iii)
iv) 
The order of reactivity of the following alkenes towards electrophilic attack is
i)
ii)
iii)
iv)
chemistry-General
chemistry-
Product (a) of the reaction is:
Product (a) of the reaction is:
chemistry-General
chemistry-
The treatment of 
with Lemieux reagent (an aqueous Sol. of 
and traces of 
) produces
The treatment of with Lemieux reagent (an aqueous Sol. of and traces of ) produces
chemistry-General
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A and B are
A and B are
chemistry-General
physics-
S1 & S2 are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through S2 and perpendicular to the line joining S1 and S2 , if the frequency of both the sources is:
S1 & S2 are two coherent sources of sound having no initial phase difference. The velocity of sound is 330 m/s. No minima will be formed on the line passing through S2 and perpendicular to the line joining S1 and S2 , if the frequency of both the sources is:
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A string consists of two parts attached at x = 0. The right part of the string (x > 0) has mass mr per unit length and the left part of the string (x < 0) has mass mr per unit length. The string tension is T. If a wave of unit amplitude travels along the left part of the string, as shown in the figure, what is the amplitude of the wave that is transmitted to the right part of the string?
A string consists of two parts attached at x = 0. The right part of the string (x > 0) has mass mr per unit length and the left part of the string (x < 0) has mass mr per unit length. The string tension is T. If a wave of unit amplitude travels along the left part of the string, as shown in the figure, what is the amplitude of the wave that is transmitted to the right part of the string?
physics-General
