Explore topic-wise InterviewSolutions in .

Which of the following compound is covalent?

If the closed packed cations in an AB type crystal has a radius of 75 pm. What would be the maximum and minimum size of the anions filling the void.

How many moles of magnesium phosphate, $M{g}_3(P{O}_4{)}_2$ will contain 0.25 mole of oxygen atoms?

Each of the following options contains a set of four molecules, identify the option(s) where all four molecules possess a permanent dipole moment at room temperature.

Based on the octet rule, boron will most likely form:

Which of the following statements about control of particulate pollution is not correct?

If you are given a $4\text{m}$ $NaOH$ solution having density $2\text{g/mL}$, then find the molarity of the solution.

Which of the following is TRUE for alkenes?

Calculate $\Delta H$ at $358K$ for the reaction,

$F{e}_2{O}_3\left(s\right)+3H_2\left(g\right)\to 2Fe\left(s\right)+3H_{2}O\left(l\right)$



Given that , $\Delta H_{298}=-33.29kJmo{l}^{-1}$ and $C_{P}forF{e}_2{O}_3\left(s\right),Fe\left(s\right),H_{2}O\left(l\right)$ and $H_2\left(g\right)$ are $103.8,25.1,75.3,and28.8J/Kmol$.

Which of the following bonds has the least energy?

Which of the following compounds will behave as a reducing sugar in an aqueous $KOH$ solution?

The standard emf of the cell $Fe|F{e}^{2+}\left(aq\right)||C{d}^{2+}\left(aq\right)|Cd$ is 0.0372 V and temperature coefficient of the cell is $-1.25\times {10}^{-4}V{K}^{-1}$. Which is/are correct about the cell (at 300 K)?

While $F{e}^{3+}$ is stable, $M{n}^{3+}$ is not stabe in acid solution because:

$(M{n}^{3+}+e^{-}\to M{n}^{2+},E^{\circ }=1.5V;O_2+4H^{+}+4e^{-}\to 2H_{2}O,E^{\circ }=+1.23V;F{e}^{3+}+e^{-}\to F{e}^{2+},E^{\circ }=0.77V)$

Extrinsic semiconductor made from intrinsic semiconductor by -

The species in which the central atom uses ${sp}^2$ - hybrid orbitals in its bonding is

What is the maximum concentration of an equimolar solution of ferrous sulphate$\left(FeS{O}_4\right)$ and sodium sulphide $\left(N{a}_{2}S\right)$ so that when mixed in equal volumes, there is not precipitation of iron sulphide $\left(FeS\right)$?

(For FeS, $K_{sp}=5\times {10}^{-18}$)

Consider the sequence of reactions and choose the major product:

The compound which obeys Markovnikov's rule when reacted with $HBr$ is:

Caprolactam is the monomer of

The charge on the electron is-

Which of the following is the correct structure of staggered newman projection of $C{H}_3-C{H}_3$?

In the reaction,

$C_6{H}_{5}CHO+(C{H}_{3}CO{)}_{2}O\underset{{180}^{\circ }C}{\overset{C{H}_{3}COONa}{\to }}X$, 'X' is

The number of $\text{P – O – P}$ bonds in $P_4{O}_6$:

Which of the following graphs represent the probability density curve for 4d electrons?

A crystalline solid has

Gastric juice contains 3.0g of $HCl$ per litre. If a person produces 2.44 litre of gastric juice per day. How many antacid tablets each containing 400 mg of $Al$($OH{)}_3$ are needed to neutralize all the $HCl$ produced in one day ?

Which of the following compound(s) can show geometrical isomerism?

Choose the correct stability order of the given alkenes.

What determines the shape of a sub-shell?

Two resistances X and Y are in the left and right gaps of a meter bridge. The balance point is 40 cm from left.Two resistances of $10\Omega$ each are connected in series with X and Y separately. The balance point is 45 cm. The value of X and Y are

The reciprocal of viscosity is called

The formal charge of S atom in $S{O}_3$ is :

The correct structure of 3-Methylpenta-1,3-diene is

A gas is confined in a chamber of constant volume. When the chamber is immersed in a bath of melting ice, the pressure of the gas is 1000 torr. The final temperature, when the pressure in the manometer indicates an absolute pressure of 400 torr is:

Which of the following would not react with benzene sulphonyl chloride in aq NaOH?

$NaOH$ is a strong base because

The end product of the reaction $C_6{H}_6+C{l}_2\stackrel{Sunlight}{\to }$

Calculate the lattice energy of a salt $M{X}_{\left(s\right)}$ from the data given below:

Heat of formation of $MX\left(\Delta H\right)=-550\text{kJ/mol}$

Heat of sublimation of $M\left(S\right)=80\text{kJ/mol}$

Heat of dissociation of $X_2\left(D\right)=155\text{kJ/mol}$

Ionization energy of $M\left(I\right)=347\text{kJ/mol}$

Electron affinity of $X\left(E\right)=-343\text{kJ/mol}$

A catalyst is used in a reaction
to

[CPMT 1972, 75, 97; DPMT 1982]

In the reaction

$HC\equiv CH+2AgN{O}_3\stackrel{N{H}_{4}OH}{\to }X+2N{H}_{4}N{O}_3+2H_{2}O$ 'X' is

Match the following:

$\begin{array}{cc}\text{a) Lyman (r, t)}& \text{p) visible}\\ \text{b) Balmer (p)}& \text{q) Infrared}\\ \text{c) Paschen (q, s)}& \text{r) Ultraviolet}\\ \text{d) Brackett (q)}& \text{s)}{n}_2=4,n_1=3\\ & \text{t)}{n}_2=5,n_1=1\end{array}$

Molal depression constant for water is 1.86°C. The freezing point of a 0.05 molal solution of a non-electrolyte in water is

In a kingdom there was an excellent archer. The ruler was jealous of his archery skills, so he decided to put his skills to test. The archer was asked to shoot an apple which was placed on his son's head or else his son will be killed. The archer always used his trusted bow.

Now that his son's life was in his hands the archer's hand started to tremble. So, now when he started shooting with the original bow he hit different spots which were close to the apple. In this case the archer is:

Among the following species, identify the isostructural pairs:

$N{F}_3,N{O}_3^{-},B{F}_3,H_3{O}^{+},H{N}_3$

The correct order of hydrogen bond strength and boiling point respectively is

When 5.85 g of NaCl and 6 g of urea are dissolved in 1000 g of water, the freezing point gets depressed by $K_f$ for water is 1.86

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen?

A $100\text{watt}$ bulb emits monochromatic light of wavelength $396\text{nm}$. Calculate the number of photons emitted per second by the bulb.