List of practice Questions

How many tripeptides are possible when following three amino acids make tripeptide? (No amino acid should repeat twice)
(A) Glycine
(B) Alanine
(C) Valine

Find out the sequence of amino acids from N-terminal to C-terminal in given polypeptide chain.

Which of the following is nonreducing sugar?

Match the following and choose the correct option.

r reduction

When 8.74 g $ \text{MnO}_2 $ is treated with HCl, then what will be the weight of $ \text{Cl}_2(g) $ obtained? Molar mass of $ \text{MnO}_2 = 87.4 \, \text{g/mol} $.

$ \text{K}_2\text{Cr}_2\text{O}_7 $ is heated with KCl in pressure of $ \text{H}_2\text{SO}_4 $. Find the correct match of product with their oxidation state.

In the following reaction:
\[ \text{MnO}_4^{-} \xrightarrow{\text{H}^+} \text{MnO}_2 + \text{MnO}_4^{2-} \] Mangante ion undergoes disproportionation in acidic medium to form:

If $K_2Cr_2O_7$ ($200 \text{ cm}^3$, $x \times 10^{-3} \text{ M}$) reacts with $0.6 \text{ M}$, $750 \text{ cm}^3$ Mohr's salt then find value of x?

The oxidation state of 'Cr' in the final product formed by reaction between $\text{KI}$ and acidified $K_2Cr_2O_7$ is :

$x & y$ are the number of moles of electrons involved respectively during oxidation of $\text{I}^-$ to $\text{I}_2$ & $\text{S}^{2-}$ to $\text{S}$ by acidified $\text{K}_2\text{Cr}_2\text{O}_7$. The value of $x+y$ is ?

Consider the reaction:
Mg + 2HCl $\rightarrow$ MgCl$_{2}$ + H$_{2}$
If 12 g of Mg reacts with excess HCl, choose the incorrect statement.

For the reaction:
\[ Cl_2 + KOH \rightarrow KCl + KClO + H_2O \] 1 mole of Cl$_2$ is passed into 2 litre, 2 M KOH solution. Determine the molarity of Cl$^-$, ClO$^-$ and OH$^-$ respectively.

500 ml, 1.2M KI is completely react with 0.2M, 500 ml $\text{KMnO}_4$ solution in basic medium. $\text{I}^-$ is oxidised to $\text{I}_2$. The liberated $\text{I}_2$ react with 0.1 M $\text{Na}_2\text{S}_2\text{O}_3$ solution. Then find volume (in L) of $\text{Na}_2\text{S}_2\text{O}_3$ solution required to completely react with liberated $\text{I}_2$.

Oxidation state of central metal of $Z$ and $Q$ are:

If $ \sum_{k=1}^{n} a_k = \alpha n^2 + \beta n $ and $ a_{10} = 59,\; a_6 = 7a_1 $, then find $ \alpha + \beta $:

An element of p-block forms a species of type EH$_4^{+}$, which when passed through a basic solution of K$_2$[HgI$_4$], forms a brown ppt. Select the correct option:

Two elements of p-block can form following halides XF$_3$ and YF$_3$. XF$_3$ can act as Lewis acid while YF$_3$ can act as Lewis base. Then hybridization of ‘X’ and ‘Y’ in XF$_3$ and YF$_3$ is respectively.

For $ P $, the incorrect statement is:

If \[ \int e^x \left( \frac{x^2 - 2}{\sqrt{1 + x(1 - x)^{3/2}}} \right) \, dx = f(x) + c \quad \text{and} \quad f(0) = 1 \] find $ f\left( \frac{1}{2} \right) $:

In a potentiometer, the null point for two resistances $R_1$ and $R_2$ is at $40\ \text{cm}$ as shown. If a $16\,\Omega$ resistance is connected in parallel to $R_2$, the null point shifts to $50\ \text{cm}$. Find the values of $R_1$ and $R_2$ respectively.

Benzene undergoes the following sequence of reactions:

Find the percentage of nitrogen in compound $ (E) $.

Observe the following reaction sequence:
\text{(P) }\xrightarrow{\text{NH}_3, \Delta} \text{(Q)} \xrightarrow{\text{Br}_2, \text{KOH}} \text{(R)}
Which of the following is the correct structure for P, Q, and R?

Statement-I : $\text{KMnO}_4 \xrightarrow{\Delta} \text{NH}_2$ followed by $\text{Br}_2/\text{KOH} \rightarrow \text{NH}_2$.
Statement-II : $\text{CH}_3\text{NH}_2 \xrightarrow{(i) \text{ Br}_2/\text{H}_2\text{O}, (ii) \text{ NaNO}_2/\text{HCl}, (iii) \text{ H}_3\text{PO}_2/\Delta} \text{CH}_3\text{Br}$.

Which of the following reaction is correctly matched with their product ?

Three experiments are running in separate vessels, following 1$^{st}$ order kinetics.
Experiment-(A) 100 ml, 10 M
Experiment-(B) 200 ml, 10 M
Experiment-(C) 100 ml, 10 M + 100 ml H$_2$O
Select correct order of rate of reaction in above experiments.