List of practice Questions

Which of the following will undergo methylation with CH₃Cl / anhyd. AlCl₃?
What are X and Y respectively in the following set of reactions?
cresol
Match the following:
List-I (Compound)List-II (pKa)
A) p-NitrophenolI) 15.9
B) PhenolII) 7.1
C) EthanolIII) 10.0
D) p-CresolIV) 10.2
The structures of succinic acid (X) and malonic acid (Y), respectively, are:
What are B and C respectively in the following set of reactions? \[ \text{C (1,2-dibromopropane)} \xrightarrow{\text{Zn},\ \Delta} \text{A} \xrightarrow[\text{(ii) NaNH}_2]{\text{(i) alc. KOH}} \text{B} \xrightarrow{\text{Lindlar Catalyst}} \text{C} \]
The crystal system with edge lengths \( a \ne b \ne c \) and axial angles \( \alpha = \beta = \gamma = 90^\circ \) is 'x' and number of Bravais lattices for it is 'y'. x and y are
Identify the two reactions A (I II) and B (I III) respectively in the following set of reactions.
An alcohol, X (C\(_5\)H\(_{12}\)O) in the presence of Cu/573K gives Y (C\(_5\)H\(_{10}\)). The reactants required for the preparation of X are
A carbonyl compound X (C\(_8\)H\(_8\)O) undergoes disproportionation with conc. KOH on heating. Product of X with Zn-Hg/HCl is Y and product of X with NaBH\(_4\) is Z. What are Y and Z respectively?
The probability of solving a question by the three students A, B, C are respectively \( \frac{3}{10}, \frac{1}{5} \) and \( \frac{1}{10} \). Find the probability of solving the question.
The grounds for decree for dissolution of marriage under Section 2 of the Dissolution of Muslim Marriages Act, 1939 are:
I. whereabouts of the husband have not been known for two years.
II. husband has been sentenced to imprisonment for a period of five years.
III. husband has failed to perform marital obligations for two years without reasonable cause.
IV. husband has neglected or failed to maintain his wife for one year.
Select the correct answer.
What phenomenon is explained by the wave nature of electromagnetic radiation?
Wave nature of light can be used to explain which phenomenon?
If two light waves of intensities \( I \) and \( 4I \) superimpose at a point with a phase difference of \( \frac{\pi}{2} \), then the resultant intensity at that point is
According to Rayleigh, when sunlight travels through atmosphere, the amount of scattering is proportional to $n^{th}$ power of wavelength of light. Then the value of $n$ is
If the far point of a short sighted person is 400 cm, then the power of the lens required to enable him to see very distant objects clearly is
Two thin convex lenses are kept in contact coaxially. If the focal length of the combination is $4~\text{cm$ and the sum of the focal lengths of the two lenses is $18~\text{cm}$, then the focal length of the lens of low power is}
Images of same size are formed by a convex lens when an object is placed either at 20 cm or 10 cm distance from the lens. The focal length of the lens is
A light ray falls on a rectangular glass slab as shown in the figure. If total internal reflection occurs at the vertical face of the slab at point \( B \), the refractive index of glass is:
A light ray falls on a rectangular glass slab
In an experiment, the angular width of interference fringes for a light of wavelength 5896 Å is found to be $3.5\times10^{-3}$ radian. The wavelength of light for which the angular width of the fringes becomes 10% greater is:
The wavelength of the monochromatic light used in Young's double slit experiment is 550 nm and the screen is placed at a distance of 120 cm from the plane of the slits. If third dark fringe is formed on the screen at a distance of 1.5 mm from the central bright fringe, then the distance of separation between the two slits is
Moment of inertia of solid sphere having mass M and radius R about an axis passing through diameter is I. Moment of inertia of sphere of mass 2M and radius 2R is:
Velocity of man swimming along the flow of river is 10 km/h and against the flow is 6 km/h. Velocity of man in still water is
The angular velocity of the minute hand and the second hand is?
If the angular displacement in 10 seconds is $ 150^\circ $, find the number of revolutions in 10 seconds.