Explore topic-wise InterviewSolutions in Current Affairs.

Question 22

One of the statements of Dalton's atomic theory is given below "Compounds are formed when atoms of different elements combine in a fixed ratio"

(a) Law of conservation of mass (b) Law of definite proportions

(c) Law of multiple proportions (d) Avogadro law

An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulphide is passed thorugh the hot acidic solution, a black precipitate is obtained. The substance is a:

what are the importance if coordination compounds?

State function among the following is

How many moles of NaCl should be dissolved in 100 mL of water to get 0.2 M solution?

100
g of liquid A (molar mass 140 g mol⁻¹)
was dissolved in 1000 g of liquid B (molar mass 180 g mol⁻¹).
The vapour pressure of pure liquid B was found to be 500 torr.
Calculate the vapour pressure of pure liquid A and its vapour
pressure in the solution if the total vapour pressure of the solution
is 475 Torr.

Highlight any two serious adverse environmental consequences of development in India. India's environmental problems pose a dichotomy- they are poverty induced and at the same time arise due to affluence in living standards. Is this true?

A sample of an ideal gas occupies volume V at a pressure P and absolute temperature T. The mass of each molecule is m. Which of the following expressions gives the density of the gas?

Where can I study all organic reaction mechanisms ?

Starting
with sodium chloride how would you proceed to prepare (i) sodium
metal (ii) sodium hydroxide (iii) sodium peroxide (iv) sodium
carbonate?

Which of the following is true for conformational isomerism?

A gas in an open container is heated from 27^{0C TO 1270C.} What will be the ratio of the gas left in the container to the original amount of gas?

Is rubber a primary metabolite or a secondary metabolite ? Write four sentences about rebber.

Match the polymers in column-A with their main uses in column-B and choose the correct answer:

$\begin{array}{cc}\text{Column-A}& \text{Column-B}\\ \text{(A) Polystyrene}& \text{(i) Paints and lacquers}\\ \text{(B) Glyptal}& \text{(ii) Rain coats}\\ \text{(C) Polyvinyl chloride}& \text{(iii) Manufacture of toys}\\ \text{(D) Bakelite}& \text{(iv) Computer discs}\end{array}$

(IIT-JEE-2015(M))

An aqueous solution of a weak monobasic acid containing 0.1 g in 21.7g of water freezes at 272.813 K. If the value of K_f for water is 1.86 K/m, what is the molecular mass of the monobasic acid?

Major end product of the following reaction is:

The major product obtained when N-methylaniine is treated with $NaN{O}_2$ and $HCl$ at 0 - 5 ${}^{\circ }C$ is:

For a reaction carried out at constant volume of 1 litre :

$N_2\left(g\right)+3H_2\left(g\right)\to 2N{H}_3\left(g\right)$

The rate of formation of $N{H}_3\left(g\right)$ at particular temperature and pressure conditions was found out to be $3.4g/min$.

What will be the rate of consumption of $N_2\left(g\right)$ at the same temperature and pressure conditions?

Aqueous solutions of 0.004 M sodium sulphate and 0.01 M glucose are isotonic. The degree of dissociation of sodium sulphate is -

Major product in the reaction is ______.

An organic compound containing $C$ and $H$ gave the following analysis: $C=40\%,H=6.7\%$ and the remaining, oxygen. Its empirical formula would be:

Arrange the following in the increasing order of their basicity.

CH₃NH₂(I) ;(CH₃)₂NH(II) ;C₆H₅NH₂(III) ;(CH₃)₃N(IV)

Which of the following represents the anode half-cell reaction for the following galvanic cell: $Cu\left(s\right)|C{u}^{2+}\left(aq\right)||A{g}^{+}\left(aq\right)|Ag\left(s\right)$

Which of the following is not true about $S{O}_3$?