List of practice Questions

The element whose percentage composition in an organic compound can be determined by Carius method is:
\( x \) mg of an organic compound was analysed by Kjeldahl method. The ammonia evolved was absorbed in 50 mL of 0.5 M \( H_2SO_4 \). The unused acid required 60 mL of 0.5 M \( NaOH \) solution for complete neutralisation. If the percentage of nitrogen in the compound is \( 56 \), the value of \( x \) is:
Identify the correct set from the following:
In the given reaction sequence, conversion of Acetophenone (\( C_6H_5COCH_3 \)) to Ethylbenzene (\( C_6H_5CH_2CH_3 \)) is an example of: \[ \text{CH}_3\text{COC/} \] \[ \text{Anhy. AlCl}_3 \xrightarrow{\text{X}} \xrightarrow{\text{(1) N}_2\text{H}_4} Y \] \[ \Delta \xrightarrow{\text{(2) KOH / glycol}} \]
Which one of the following compounds does not give benzoic acid when treated with alkaline \( KMnO_4 \)?
Consider the reaction sequence Dimethyl ketone \( \xrightarrow{\text{(i)CH}_3\text{MgCl (ii)H}_2\text{O}} \) X \( \xrightarrow{\text{(i)Na (ii)CH}_3\text{Br}} \) Y How many sp\(^3\) carbons are present in Y?
The element whose percentage composition in an organic compound can be determined by Carius method is:
Identify the correct set from the following:
IUPAC names of the given compounds (I) and (II) are respectively
Identify the most stable carbocation from the following
Which of the following will undergo methylation with CH₃Cl / anhyd. AlCl₃?
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:
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
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