Explore topic-wise InterviewSolutions in Current Affairs.

The power of halides of boron to act as Lewis acids decreases in the order:

Oxidation number of carbon in $C_3{O}_2$ ,$M{g}_2{C}_3$,are respectively

Which of the following compounds reduce(s) ammoniacal silver nitrate solution?

$C_6{H}_{5}CHO$

$C{H}_{3}C{H}_{2}CHO$

$C{H}_{3}C{H}_{2}OH$

$C{H}_{3}CH\left(OH\right)COC{H}_3$

Predict the general formula for the given unit cell.

A
tank is filled with water to a height of 12.5 cm. The apparent
depth of a needle lying at the bottom of the tank is measured by a
microscope to be 9.4 cm. What is the refractive index of water? If
water is replaced by a liquid of refractive index 1.63 up to the same
height, by what distance would the microscope have to be moved to
focus on the needle again?

The IUPAC name of the compound?

If the radius of $3^{rd}$ Bohr’s orbit of H-atom is r, then the radius of $4^{th}$ Bohr’s orbit of $H{e}^{+}$ would be

$n_1$ and $n_2$ moles of two ideal gases (mol. wt. $M_1$ and $M_2$) respectively at temperature $T_1$K and $T_2$K are mixed. Assuming that no loss of energy, the temperature of mixture becomes -

Arrange water, ethanol and phenol in increasing order of acidity and give reason for your answer.

Which of the following compounds will not give a positive test with Tollens' reagent?

Ammonia kept under pressure of 15 atm at 27⁰C is heated to 347⁰C in a closed vessel in the presence of catalyst. Under these conditions, NH₃ is partially decomposed according to the equation, $2N{H}_3\leftrightharpoons N_2+3H_2$. The vessel is such that the volume remains effectively constant whereas pressure increases to 50 atm. Calculate the percentage of NH₃ actually decomposed.

Lithium boron hydride crystallizes in an orthorhombic system with 4 molecules per unit cell. Dimensions of the unit cell are:

$a=6\stackrel{\circ }{A},\text{b}=4\stackrel{\circ }{A}$ and $c=7\stackrel{\circ }{A}$.

If the molar mass is $21g$, calculate the density of crystal.

What is nodal plane and explain it's features

Selenium monochloride exists as a dimer. It disproportionate to give:

Which of the following relation is true for cubical voids?

Where, $R$ is radius of sphere

$r$ is radius of octahedral void

$a$ is edge length of unit cell

$H_2{O}_2$ cannot oxidize:

The nitrogen oxides that contain N – N bond(s) is:

The number of structural isomers possible from the molecular formula $C_3{H}_{9}N$ is:

The wave number of the limiting line of Balmer series of hydrogen spectrum is