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questions
List of practice Questions
Explain the mechanism of dehydration of ethanol.
UP Board XII - 2024
UP Board XII
Chemistry
Reaction mechanisms
Explain the difference between aldehydes and ketones by Fehling solution and Schiff reagent.
UP Board XII - 2024
UP Board XII
Chemistry
Organic Reactions
Explain ionisation isomerism and linkage isomerism in coordination compounds with example.
UP Board XII - 2024
UP Board XII
Chemistry
Coordination Compounds
Which of the following has the maximum Young’s modulus value?
KEAM - 2024
KEAM
Physics
mechanical properties of solids
The gravitational potential energy of a system of two bodies each of mass $m$ and distance $r$ between them is (G = gravitational constant, g = acceleration due to gravity)
KEAM - 2024
KEAM
Physics
Gravitational Potential Energy
The radius of gyration of a regular solid cylinder of radius $R$ about its axis is
KEAM - 2024
KEAM
Physics
Rotational motion
If $P$ is the pressure at which the heart is pumping the blood and the volume of blood pumped per second is $V$, then the power of the heart is given by
KEAM - 2024
KEAM
Physics
Work Power and Energy
When a spring of spring constant $k$ is cut into two pieces whose lengths are $l_1$ and $l_2$, then the ratio of their spring constants $k_1$ and $k_2$ is
KEAM - 2024
KEAM
Physics
Equilibrium Constant
In a ‘tug of war’ game, two persons pull each other through a massless rope. The person who wins is
KEAM - 2024
KEAM
Physics
Fluid Mechanics
A particle is describing a uniform circular motion with a certain constant speed. The INCORRECT statement is
KEAM - 2024
KEAM
Physics
Circular motion
Dimensions of the physical quantity $X$ in the equation \[ {Force} = \frac{X}{{Volume}} \] are
KEAM - 2024
KEAM
Physics
Dimensional Analysis
After eliminating salt bridge of any Galvanic cell, voltage of the cell:
UP Board XII - 2024
UP Board XII
Chemistry
Electrochemistry
Four alternatives are given in each part of this question. Write the correct alternative in your answer-book.
Fe is:
UP Board XII - 2024
UP Board XII
Chemistry
Electronic Configurations of the d-Block Elements
Write the chemical equations for the preparation of 1-iodobutane from the following:
1-butanol
UP Board XII - 2024
UP Board XII
Chemistry
Order of reaction
How does the acidified \( KMnO_4 \) solution react with ferrous sulphate, \( SO_2 \), oxalic acid, and sodium thiosulphate?
UP Board XII - 2024
UP Board XII
Chemistry
Acids, Bases And Salts
Calculate the e.m.f. of the following cell writing the cell reaction:
\[ \text{Cu} | \text{Cu}^{2+}(1M) || \text{Ag}^+(1M) | \text{Ag} \] Given: \[ E^0_{\text{Cu}^{2+}/\text{Cu}} = +0.34 \text{ volt}, \quad E^0_{\text{Ag}^+/\text{Ag}} = +0.80 \text{ volt} \]
UP Board XII - 2024
UP Board XII
Chemistry
Fuel Cells
At 298 K conductivity of 0.20 M KCl solution is 0.0248 S cm\(^{-1}\). Calculate its molar conductivity.
UP Board XII - 2024
UP Board XII
Chemistry
Mole concept and Molar Masses
Write the units of velocity and velocity constant for zero order reaction.
UP Board XII - 2024
UP Board XII
Chemistry
Order of reaction
Write I.U.P.A.C. names of the following compounds:
\( CH_3CH(CH_3)CH_2CH_2CH_2CHO \)
UP Board XII - 2024
UP Board XII
Chemistry
Chemistry of organic compounds
The velocity of a gaseous reaction is halved, whereas the volume of the pot is doubled. Calculate the order of reaction.
UP Board XII - 2024
UP Board XII
Chemistry
Order of reaction
For a first-order reaction, prove that the time taken in completion of 3/4 part of the reaction is two times that of its half-life period.
UP Board XII - 2024
UP Board XII
Chemistry
Order of reaction
Explain the importance of complex compounds in qualitative analysis with a suitable example.
UP Board XII - 2024
UP Board XII
Chemistry
Chemistry of organic compounds
Among the following, which is more acidic?
UP Board XII - 2024
UP Board XII
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Lucas reagent is
UP Board XII - 2024
UP Board XII
Chemistry
Grignard’s reagents and their uses
Which of the following amines does not give carbylamine reaction?
UP Board XII - 2024
UP Board XII
Chemistry
Reaction mechanisms
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