Class 11
Alex Man asked • 9 minutes agoHow the effect of competitive inhibitors can be nullified ?- a)By increasing concentration of substrate
- b)By decreasing concentration of substrate
- c)By increasing concentration of enzyme
- d)By decreasing concentration of enzyme
Correct answer is option 'A'. Can you explain this answer?
How the effect of competitive inhibitors can be nullified ?
a)
By increasing concentration of substrate
b)
By decreasing concentration of substrate
c)
By increasing concentration of enzyme
d)
By decreasing concentration of enzyme
Talwinder Kaur asked • 39 minutes agoEach leaf of Cycas is supplied by :- a)Two direct traces and two girdle traces
- b)A number of direct traces and two girdle traces
- c)A number of direct traces and a number of girdle traces
- d)Two direct traces and a number of girdle traces
Correct answer is option 'A'. Can you explain this answer?
Each leaf of Cycas is supplied by :
a)
Two direct traces and two girdle traces
b)
A number of direct traces and two girdle traces
c)
A number of direct traces and a number of girdle traces
d)
Two direct traces and a number of girdle traces
Sujata Tanwar asked • 40 minutes agoPassage IIHeat of combustion of sucrose under standard state is - 5640 kJ mol-1. A healthy person takes 20 breaths per minute, and each breath consumer 480 mL of air. Inhaled and exhaled air contains 20% and 15% of oxygen by volume. Q. If oxygen retained in the body is used in the combustion of sucrose, number of moles of sucrose combusted per day is- a)2.3542 mol
- b)4.7084 mol
- c)1.1771 mol
- d)1.2792 mol
Correct answer is option 'A'. Can you explain this answer?
Passage II
Heat of combustion of sucrose under standard state is - 5640 kJ mol-1. A healthy person takes 20 breaths per minute, and each breath consumer 480 mL of air. Inhaled and exhaled air contains 20% and 15% of oxygen by volume.
Q. If oxygen retained in the body is used in the combustion of sucrose, number of moles of sucrose combusted per day is
a)
2.3542 mol
b)
4.7084 mol
c)
1.1771 mol
d)
1.2792 mol
Sujata Tanwar asked • 1 hour agoDirection (Q. Nos. 16) Choice the correct combination of elements and column I and coloumn II are given as option (a), (b), (c) and (d), out of which ONE option is correct.Q. Thermodynamic equilibrium constant K is related to temperature by equation log10 
- a)a
- b)b
- c)c
- d)d
Correct answer is option 'A'. Can you explain this answer?
Direction (Q. Nos. 16) Choice the correct combination of elements and column I and coloumn II are given as option (a), (b), (c) and (d), out of which ONE option is correct.
Q. Thermodynamic equilibrium constant K is related to temperature by equation log10
a)
a
b)
b
c)
c
d)
d
Sujata Tanwar asked • 2 hours agoDirection (Q. No. 9) This sectionis based on statement I and Statement II. Select the correct answer from the code given below.Q. Statement I :Every endothermic reaction is spontaneous if TΔS > ΔH.Statement II : Sign of ΔG is the true criterion for deciding spontaneity of a reaction.- a)Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I
- b)Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I
- c)Statement I is correct but Statement II is incorrect
- d)Statement II is correct but Statement I is incorrect
Correct answer is option 'B'. Can you explain this answer?
Direction (Q. No. 9) This sectionis based on statement I and Statement II. Select the correct answer from the code given below.
Q.
Statement I :Every endothermic reaction is spontaneous if TΔS > ΔH.
Statement II : Sign of ΔG is the true criterion for deciding spontaneity of a reaction.
a)
Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I
b)
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I
c)
Statement I is correct but Statement II is incorrect
d)
Statement II is correct but Statement I is incorrect
Raja Khan Rana asked • 2 hours agoA compound X (C5HgBr) is optically active. X on treatment with KOH in ethanol gives Y (C5H8) as major product. Ozonolysis of Y followed by Zn-hydrolysis gives Z (C5H8O2) . Z forms yellow precipitate with NaO H/l2 as well as it reduces Tollen’s reagent. Z on treatment with Zn (Hg)/HCI gives pentane. The correct statement(s) regarding X, Y and Z is/are- a) is 1-bromp-1ynethyl cyclobutane
- b)X is 1-bromo-2-imethyl cyclobutane
- c)Y is a chiral hydrocarbon
- d)Z is an oxoaldebyde
Correct answer is option 'B,D'. Can you explain this answer?
A compound X (C5HgBr) is optically active. X on treatment with KOH in ethanol gives Y (C5H8) as major product. Ozonolysis of Y followed by Zn-hydrolysis gives Z (C5H8O2) . Z forms yellow precipitate with NaO H/l2 as well as it reduces Tollen’s reagent. Z on treatment with Zn (Hg)/HCI gives pentane. The correct statement(s) regarding X, Y and Z is/are
a)
is 1-bromp-1ynethyl cyclobutane
b)
X is 1-bromo-2-imethyl cyclobutane
c)
Y is a chiral hydrocarbon
d)
Z is an oxoaldebyde
Devanshu Sahni asked • 2 hours agoStatement I : Boiling point of an alkene is slightly greater than that of its hydrogenated alkane.
Statement II : Alkenes have stronger van der Waals’ force of attraction than alkanes.- a)Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I
- b)Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I
- c)Statement I is correct but Statement II is incorrect
- d)Statement II is correct but Statement I is incorrect
Correct answer is option 'C'. Can you explain this answer?
Statement I : Boiling point of an alkene is slightly greater than that of its hydrogenated alkane.
Statement II : Alkenes have stronger van der Waals’ force of attraction than alkanes.
Statement II : Alkenes have stronger van der Waals’ force of attraction than alkanes.
a)
Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I
b)
Both Statement I and Statement II are correct and Statement II is not the correct explanation of Statement I
c)
Statement I is correct but Statement II is incorrect
d)
Statement II is correct but Statement I is incorrect
Sujata Tanwar asked • 3 hours agoPassage IOctane (C8H18), a primary constituent of gasoline, burns in air
A 1.00 g sample of octane is burned in a constant volume calorimeter containing 1.20 kg of water. The temperature of water and the bomb rises by 8.2 K. The heat capacity of the bomb is 837.0 JK-1. Molar heat capacity of water is 4.184 J g-1 K-1. Initial temperature is 298 K. Q. ΔCH° (per mol of C8H18) is- a)-5487.0 kJ
- b)+5487.0 kJ
- c)-59.18 kJ
- d)+59.18 kJ
Correct answer is option 'A'. Can you explain this answer?
Passage I
Octane (C8H18), a primary constituent of gasoline, burns in air
A 1.00 g sample of octane is burned in a constant volume calorimeter containing 1.20 kg of water. The temperature of water and the bomb rises by 8.2 K. The heat capacity of the bomb is 837.0 JK-1. Molar heat capacity of water is 4.184 J g-1 K-1. Initial temperature is 298 K.
Q. ΔCH° (per mol of C8H18) is
a)
-5487.0 kJ
b)
+5487.0 kJ
c)
-59.18 kJ
d)
+59.18 kJ
Swetha Raj asked • 4 hours agoUltrafilatration occurs in a glomerulus when-- a)Osmotic pressure exceeds hydrostatic
pressure - b)Hydrostatic pressure exceeds osmotic
pressure - c)Colloidal osmotic pressure plus capsular
pressure remain less than glomerular
hydrostatic pressure - d)Capsular hydrostatic pressure exceeds
glomerular hydrostatic pressure
Correct answer is option 'C'. Can you explain this answer?
Ultrafilatration occurs in a glomerulus when-
a)
Osmotic pressure exceeds hydrostatic
pressure
pressure
b)
Hydrostatic pressure exceeds osmotic
pressure
pressure
c)
Colloidal osmotic pressure plus capsular
pressure remain less than glomerular
hydrostatic pressure
pressure remain less than glomerular
hydrostatic pressure
d)
Capsular hydrostatic pressure exceeds
glomerular hydrostatic pressure
glomerular hydrostatic pressure
Prashant Patil asked • 5 hours agoSolve by cramer's rule 1/x 1/y=3/2, 1/y 1/z=5/6 , and 1/z 1/x=4/3?
Prabakaran Prathabasingh asked • 5 hours agoA body B is capable of remaining stationary inside a liquid at the position shown in Fig (a). If the whole system is gently placed on smooth inclined plane (Fig b.) and is allowed to slide down, then (0 < θ < 900 )
- a)The body will move up (relative to liquid)
- b)The body will move down (relative to liquid)
- c)The body will remain stationary (relative to liquid)
- d)The body will move up for some inclination θ and will move down for another inclination θ .
Correct answer is option 'D'. Can you explain this answer?
A body B is capable of remaining stationary inside a liquid at the position shown in Fig (a). If the whole system is gently placed on smooth inclined plane (Fig b.) and is allowed to slide down, then (0 < θ < 900 )
a)
The body will move up (relative to liquid)
b)
The body will move down (relative to liquid)
c)
The body will remain stationary (relative to liquid)
d)
The body will move up for some inclination θ and will move down for another inclination θ .
Sunjar asked • 6 hours agoA particle is executing S.H.M with an amplitude of 4 cm and time period 12 sec. The time taken by the particle in going from its mean position to a position of displacement equal to 2 cm is T1..The time taken from this displaced position of 2 cm to reach the extreme position is T2. Therefore, T1/ T2 will be- a)1/ 3
- b)1/2
- c)41276.0
- d)1
Correct answer is option 'B'. Can you explain this answer?
A particle is executing S.H.M with an amplitude of 4 cm and time period 12 sec. The time taken by the particle in going from its mean position to a position of displacement equal to 2 cm is T1..The time taken from this displaced position of 2 cm to reach the extreme position is T2. Therefore, T1/ T2 will be
a)
1/ 3
b)
1/2
c)
41276.0
d)
1
Ultimate Physics asked • 7 hours agoTwo identical balls are interconnected with a massless and inextensible thread. The system is in gravity free space with the thread just taut. Each ball is imparted a velocity v, one towards the other ball and the other perpendicular to the first, at t = 0. Then,- a)The thread will become taut at t = (L/v)
- b)The thread will become taut at some time t < (L/v).
- c)The thread will always remain taut for t > (L/v)
- d)The kinetic energy of the system will always remain mv2.
Correct answer is option 'A,C'. Can you explain this answer?
Two identical balls are interconnected with a massless and inextensible thread. The system is in gravity free space with the thread just taut. Each ball is imparted a velocity v, one towards the other ball and the other perpendicular to the first, at t = 0. Then,
a)
The thread will become taut at t = (L/v)
b)
The thread will become taut at some time t < (L/v).
c)
The thread will always remain taut for t > (L/v)
d)
The kinetic energy of the system will always remain mv2.
Mansi Behl asked • 7 hours agoIdentify the correct statement(s)- a)The friction force acting on the cylinder may be more than that acting on the ring
- b)The friction force acting on the ring may be more than that acting on the cylinder
- c)If the friction is sufficient to roll the cylinder then the ring will also roll
- d)If the friction is sufficient to roll the ring then the cylinder will also roll
Correct answer is option 'B,D'. Can you explain this answer?
Identify the correct statement(s)
a)
The friction force acting on the cylinder may be more than that acting on the ring
b)
The friction force acting on the ring may be more than that acting on the cylinder
c)
If the friction is sufficient to roll the cylinder then the ring will also roll
d)
If the friction is sufficient to roll the ring then the cylinder will also roll
Janvi Sahu asked • 7 hours agoThe horizontal range and maximum height at tained by a projectile are R and H, respectively. If a constant horizontal acceleration a = g/4 is imparted to the projectile due to wind, then its horizontal range and maximum height will be- a)
- b)
- c)(R + 2H),H
- d)(R + H), H
Correct answer is option 'D'. Can you explain this answer?
The horizontal range and maximum height at tained by a projectile are R and H, respectively. If a constant horizontal acceleration a = g/4 is imparted to the projectile due to wind, then its horizontal range and maximum height will be
a)
b)
c)
(R + 2H),H
d)
(R + H), H
Aman Goel asked • 7 hours agoPick up the correct statements regarding isomers of C2FCIBrt- a)It has three pair of geometrical isomers
- b)It has total eight isomers
- c)Two of its isomers where F and CI are trans, have same dipole moment
- d)Two of its isomers where F and Br are trans, are non-polar
Correct answer is option 'A,C'. Can you explain this answer?
Pick up the correct statements regarding isomers of C2FCIBrt
a)
It has three pair of geometrical isomers
b)
It has total eight isomers
c)
Two of its isomers where F and CI are trans, have same dipole moment
d)
Two of its isomers where F and Br are trans, are non-polar
Kajal Rathore asked • 7 hours agoDirection (Q. Nos. 22) This section contains 1 questions. when worked out will result in an integer from 0 to 9 (both inclusive)Q. Most acidic H in the following compound is attached to C-atoms denoted by at S-N. ( ) ...
Correct answer is '1'. Can you explain this answer?
Direction (Q. Nos. 22) This section contains 1 questions. when worked out will result in an integer from 0 to 9 (both inclusive)
Q. Most acidic H in the following compound is attached to C-atoms denoted by at S-N. ( ) ...
Preethi Sri asked • 8 hours ago20 metre deep like the bottom is at a constant temperature is 14 degree Celsius the act temperature is constant at 10 degree Celsius the thermal conductivity of ice is 4 times that of water lifting the expansion of water on freezing the maximum thickness is Ruby Related: Temperature and Heat (Measurement)?
Related: Temperature and Heat (Measurement)
Fetching relevant content for you
Ask a question
Related Courses
|
Follow Us
|