Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following is used to distinguish primary, secondary and tertiary amines

The general outermost shell electronic configuration for Actinoids is:

In a mixture of ideal gases at a fixed temperature the heavier molecule has the lower average speed. This is easiest to conclude from the equation

Al and Ga have nearly the same covalent radii because of:

Find the ratio of energies of violet light $({\lambda }_1=4.10\times {10}^{-5}\text{cm})$ to that of red light $({\lambda }_2=6.56\times {10}^{-5}\text{cm})$.

If $\alpha$ is the degree of ionization, $C$ the concentration of a weak electrolyte and $K_a$ the acid ionization constant, then the correct relationship between $\alpha$, C and $K_a$ is

Starch paper is used to test for the presence of

1g of the Ag salt of an organic dibasic acid yields, on strong heating, 0.5934 g of silver. If the weight $\%$ of carbon in it is 8 times the weight $\%$ of hydrogen and half the weight percentage of oxygen, determine the molecular formula of the acid [Atomic wt of Ag = 108]

$D_{2}O$ is used more in

The rate constant, the activation energy and the Arrhenius parameter of a chemical reaction at ${25}^{\circ }C$ are $x,10xkJ/mol$ and $2x{s}^{-1}$. The value of the rate constant as $T\to \infty$ is:

One litre hard water contains 12 me Mg2+ ions. Milli equivalent of washing soda required to remove it's hardness is

a) 1

b12.26

c) 1*10^-3

d) 12.16*10^-3

Please sir/maam provide detailed explanation

Which of the sets of elements follows Newland’s octave rule:-

A)Be,Mg,Ca

B)Na,K,Rb

C)F,Cl,Br

D)B,Al,Ga

and how?

Calculate electrons, protons and neutrons in $H_{3}P{O}_4$.

Which of the following graphs show equilibrium:

An Electromagnetic radiation of wavelength 242 nm is just sufficient to ionize a sodium atom. Calculate the ionization energy of sodium in kJ ${mol}^{-1}$.

Conversion of chlorobenzene to a mixture of 2-chloroacetophenone and 4-chloroacetophenone Is an example of

Which of the following atoms has the highest first ionization energy?

The reaction of cyanamide, $N{H}_{2}C{N}_{\left(s\right)}$, with dioxygen was carried out in a bomb calorimeter, and $\Delta U$ was found to be $-742.7kJmo{l}^{-1}$ at 298 K. calculate enthalpy change for the reaction at 298 K.
$N{H}_{2}C{N}_{\left(g\right)}+\frac{3}{2}{O}_{2\left(g\right)}\to N_{2\left(g\right)}+C{O}_{2\left(g\right)}+H_2{O}_{\left(l\right)}$

$C_6{H}_{5}OH+CHC{l}_3+NaOH\to$Salicylaldehyde. The electrophile involved in the above reaction is.

The complementary strand for the following single strand of DNA is:
$5^{\prime }\leftarrow A-T-G-C-T\to 3^{\prime }$

Entropy change when 4 moles of an ideal gas expands reversibly from an initial volume of 1 $d{m}^3$ to a final volume of 10 $d{m}^3$ at a constant temperature of 298 K is

A hydrogen like species (atomic number $Z$) is present in a higher excited state of quantum number $n$. This excited atom can make a transition to the first excited state by successive emission of two photons of energies $10.20eV$ and $17.0eV$ respectively. Alternatively, the atom from the same excited state can make a transition to the second excited state by successive emission of two photons of energy $4.25eV$ and $5.95eV$ respectively. Determine the value of $Z$.
$(Given:\frac{27.2}{10.2}=2.66,\frac{60}{1.66}\approx 36,hc{R}_H=13.6eV)$

The order of dehydration of alcohols leading to the formation of ethers follows the sequence:

When both positive and negative ions of a salt are complex ions and the two isomers differs in the distribution of ligands in the cation and the anion; it is a type of:

The chemical formula of Chile salt petre is:

Which of the following method is used to prepare p-bromoaniline as the major product?

Which of the following is a carbanion?

For the redox reaction
$Mn{O}_4^{\ominus }+C_2{O}_4^{2-}+H^{\oplus }\to M{n}^{+2}+C{O}_2+H_{2}O$
The correct coefficients of the reactions for the balanced reaction are

Explain what is observed

(i) when a beam of light is passed through a colloidal sol.

(ii) an electrolyte, NaCl is added to hydrated ferric oxide sol.

(iii) electric current is passed through a colloidal sol?

least chemical activity is shown by

$C{O}_3^{2-}$ anion has which of the following characteristics