List of practice Questions

From a book, a number of consecutive pages are missing. The sum of the page numbers of these pages is 9808. Which pages are missing?

Four stacks containing an equal number of chips are to be made from 11 orange, 9 white, 13 black and 7 yellow chips. If all of these chips are used and each stack contains at least one chip of each colour, what is the maximum number of white chips in any one stack?

In the following sentence choose the erroneous segment/s
He is one of those people /A who thinks /B he owns the world/C

We can never make our beliefs regarding the world certain. Even scientific theory of a most rigorous and well-confirmed nature is likely to change over a decade or even tomorrow. If we refuse to even try to understand, then it is like resigning from the human race. Undoubtedly life of an unexamined kind is worth living in other respects—as it is no mean thing to be a vegetable or an animal. It is also true that a man wishes to see this speculation domain beyond his next dinner.
From the above passage it is clear that the author believes that

The standard free energy change of a reaction is $\Delta G^{\circ}$ = - $115\,kJ$ at $298 \,K$. Calculate the equilibrium constant $k_p$ in $\log k_p$ $ (R = 8.314 \,Jk^{-1} mol^{-1}).$

Reaction of $PCl _{3}$ and $PhMgBr$ would give

Anisole is the product obtained from phenol by the reaction known as

When acetamide is hydrolysed by boiling with acid, the product obtained is :

When ethyl alcohol is heated with conc. $H_2SO_4$, the product obtained is :

Which will not go for diazotization ?

Three resistances of $4 \,\Omega$ each are connected as shown in figure. If the point $D$ divides the resistance into two equal halves, the resistance between point $A$ and $D$ will be

A solid sphere of radius $R_{1}$ and volume charge density $\rho=\frac{\rho_{0}}{r}$ is enclosed by a hollow sphere of radius $R_{2}$ with negative surface charge density $\sigma$, such that the total charge in the system is zero, $\rho_{0}$ is a positive constant and $r$ is the distance from the centre of the sphere. The ratio $\frac{R_{2}}{R_{1}}$ is

The resistance of a metal increases with increasing temperature because

Let $y$ be the number of people in a village at time $t$. Assume that the rate of change of the population is proportional to the number of people in the village at any time and further assume that the population never increases in time. Then the population of the village at any fixed time $t$ is given by

Which of the following is not a characteristic of transition elements ?

Which of the following is ketohexose ?

The number of hydrogen atoms present in $25.6\, g$ of sucrose $\left( C _{12} H _{22} O _{11}\right)$ which has a molar mass of $342.3\, g$ is

Milk changes after digestion into :

The number of formula units of calcium fluoride, $CaF _{2}$ present in $146.4\, g$ of $CaF _{2}$ (the molar mass of $CaF _{2}$ is $78.08 \,g / mol$ ) is

The molar conductivities of $KCl, NaCl$ and $KNO_3$ are $152, 128 $ and $111\, S\,cm^2\, mol^{-1}$ respectively. What is the molar conductivity of $NaNO_3$?

The number of unpaired electrons calculated in $[Co (NH_3)_6]^{3+}$ and $Co (F_6)Z^{3-}$ are

The oxidation number of oxygen in $KO _{3}, Na _{2} O _{2}$ is

Which of the following sets consists only of essential amino acids ?

$Cl - P - Cl$ bond angles in $PCl_5$ molecule are

The magnetic moment of a salt containing $Zn ^{2+}$ ion is