Explore topic-wise InterviewSolutions in Current Affairs.

Hyperconjugation occurs in which of the following?

A gas expands by 0.5 litre against a constant pressure of one atmosphere. The work done is as follows.

Cortisone is a molecular substance that has $21$ atoms of carbon per molecule. The mass percentage of carbon in cortisone is 69.98%. Its molar mass is:

R(alkyl) should not be:

Arrange the following in increasing order of the atomic sizes and give reasons

Na⁺ , Mg²⁺ , Al³⁺ , F^- , O^2- , C^4-

Sir pressure increses or decreses with increse in temperature for solution of gases in liquid and how

How many state are in colloidal solution?

1)1

2)2

3)3

4)4

At what temperature the reading on Kelvin scale is three times that on Celsius scale

Identify the correct statements for the given compounds

where x & y are O – F bond lengths a & b are O – O bond lengths.

(p)$O_2{F}_2$ and $H_2{O}_2$ both are having same shape (q) a > b and y > x

(r) b > a and y > x (s) b > a and x = y

Which of the following are homocyclic aromatic compounds?

pH of a saturated solution of $Ba\left(OH\right){)}_2$ is $12$. Its solubility product is -

Which quantity out of ${\Delta }_{r}G$ and ${\Delta }_r{G}^{\ominus }$ will be zero at equilibrium?

The work done in blowing a soap bubble of radius r of the solution of surface tension T will be

Let f: {1, 2, 3} → {1, 2, 3} be an onto function. Then, f is

What does the following figure depict?

If one electron has been removed from an atom, it becomes increasingly difficult to remove the second and subsequent electrons from the resulting positively charged ions on account of electrostatic attraction.
Suppose a gas mixture of F, Cl, Br, and I is irradiated with photons of frequency appropriate to ionize Cl. What ion(s) will be present in the mixture?

Methyl cyanide on hydrolysis gives:

A dye absorbs a photon of wavelength λ and re-emits the same energy into two photons of wavelength ${\lambda }_1$ and ${\lambda }_2$ respectively. The wavelength λ is related with ${\lambda }_1$ and ${\lambda }_2$ as:

Temporary hardness is due to

Schiff's base is prepared from:

Lithium (Z = 3) has two stable isotopes ${}^6\text{Li}$ and ${}^7\text{Li}$ . When neutrons are bombarded on lithium sample, electrons and $\alpha$ - particles are ejected. Write down the nuclear processing taking place.

Balmer gave an equation for wavelength of visible region of H-spectrum as $\lambda =\frac{K{n}^2}{n^2-4}$. Where n = principal quantum number of energy level, K = constant in terms of R (Rydberg constant).
The value of K in term of R is:

Nylon – 6,6 is

4 moles of A are mixed with 4 moles of B. At equilibrium for the reaction

A + B $\rightleftharpoons$ C + D, 2 moles of C and D are formed. The equilibrium constant for the

reaction will be

Complete each synthesis by giving missing starting material, reagent or products.

Glycerol is used in the manufacture of [SCRA 1991]

1kg of Ethylene undergo polymerisation completely, then the weight of polyethylene obtained is _______________gm.

A solution containing one mole per litre of each and is being electrolysed by using inert electrodes. The values of standard electrode potentials in volts (reduction potentials) are

with increasing voltage, the sequence of deposition of metals on the cathode will be

[IIT 1984; AMU 1999; Kerala PMT 2004]

For the reaction $A{g}_{2}O\left(s\right)\to 2Ag\left(s\right)+\frac{1}{2}{O}_2\left(g\right)$ which one of the following is true?

Atoms of element B from HCP lattice and those of element A occupy two thirds of tetrahedral voids. What is the formula of the compound formed by elements A and B.

The usefulness of fermentation as a means of deriving energy is limited because

Which of the following alkenes is most reactive towards cationic polymerisation?

Write the Nernst equation and emf of the following cells at 298 K:

(i) $Mg\left(s\right)|M{g}^{2+}\left(0.001M\right)||C{u}^{2+}\left(0.001M\right)|Cu\left(s\right)$

(ii) $Fe\left(s\right)|F{e}^{2+}\left(0.001M\right)||H^{+}\left(1M\right)|H_2\left(g\right)\left(1bar\right)|Pt\left(s\right)$

(iii) $Sn\left(s\right)|S{n}^{2+}\left(0.050M\right)||H^{+}\left(0.020M\right)|H_2\left(g\right)\left(1bar\right)|Pt\left(s\right)$

(iv) $Pt\left(s\right)|B{r}_2\left(l\right)|B{r}^{-}\left(0.010M\right)||H^{+}\left(0.030M\right)|H_2\left(g\right)\left(1bar|Pt\right(s\left)\right)$

$E_{\left(\frac{M{g}^{2+}}{Mg}\right)}^{\circ }=-2.37V;E_{\left(\frac{C{u}^{2+}}{Cu}\right)}^{\circ }=+0.34V;E_{\left(\frac{F{e}^{2+}}{Fe}\right)}^{\circ }=-0.44V;E_{\left(\frac{S{n}^{2+}}{Sn}\right)}^{\circ }=-0.14V;E_{\left(\frac{\frac{1}{B{r}_2}}{B{r}^{-}}\right)}^{\circ }=+1.08V,$

Define hydrogen bond. Is it weaker or stronger than the van der Waals forces?

A steel bottle contains $20\text{L}$ of gas at $10\text{atm}$ and $27{}^{\circ }\text{C}$. What is its volume at STP?