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The most stable ion is:

The refractive index of a material changes by 0.014 as the colour of the light changes from red to violet. A rectangular slab of height 2.00 cm made of this material is placed on a newspaper. When viewed normally in yellow light, the letters appear 1.32 cm below the top surface of the slab. Calculate the dispersive power of the material.

What is the percent yield of the following reaction if $42g$ of $MgC{O}_3$ is heated to give $10g$ of $MgO$?
$MgC{O}_3\to MgO+C{O}_2$

A monoatomic gas follows cyclic process ABCA, heat supplied to the gas in these steps are: for $AB\to x$, for $BC\to y$ and for $CA\to z$, then what is the efficiency of engine based on cyclic process ABCA.
(B and C lie on same isothermal curve)

Two different adiabatic parts for the same gas intersect two isothermals at $T_1$ and $T_2$ as shown in P-V diagram. Then the ratio of $\frac{V_a}{V_b}$ will be

A solution A has 10 gm of solute B dissolved in 2 moles of solvent. What is the mole fraction of the solute?

Sn when fused with $NaOH$ will form.

The reaction of phenol with chloroform in the presence of dilute sodium hydroxide introduces which of the following functional group?

Increase in ionic character of LiF,K2O,SO2,N2,ClF3. sir please explain in detail

Which of the following contains the maximum number of atoms at STP?

Which of these substances is the best reducing agent

What Is Isotones , Isodaiphers , Isoelectronic And Isosters

The number of donor sites in dimethyl glyoxime, glycinato, diethylene triamine and EDTA are respectively.

Which of the following reactions are comproportionation reactions?

In which of the following has the average oxidation number of oxygen been arranged in increasing order ?

The species that can act both as a Bronsted acid as well as a base?

Which of the following is the correct structure of Ethanenitrile?

Q. Depression of freezing point of 0.01 molal aqueous Acetic Acid solution is 0.0204 degree Celsius. 1 molal urea solution freezes at -1.86 degree Celsius. Assuming molality equal to molarity, pH of Acetic Acid solution.

Which of the following compounds are formed by the oxidation of 3 - methyl butane 1, 2, 3 - triol with $HI{O}_4$?

The IUPAC name of the following compound is:

$Cl|C{H}_3-C-C{H}_2-CH=CH-C{H}_3|H$

What is black body and what are black body radiation

What is the molality of pure water

The set representing the correct order of first ionization potential is

Molar conductivity=kaapa/concentration how this formula can be converted to kaapa×1000/molarity

A solution of solute 'X' contains 30% X by weight of solution. 500 g of this solution was cooled when 50 g of solute gets precipitated. The % age composition of the remaining solution is ?

Pick out an example of paramagnetic molecule from the following:

Enthalpy of hydrogenation is the enthalpy change when one mole of unsaturated compound is converted to saturated compound. Heat of hydrogenation helps to calculate resonance energy.
The heats of neutralization of $C{H}_{3}COOH,HCOOH,HCN$ and $H_{2}S$ are –12.8, –13.2, –3.2 and –3.9 kcal per equivalent. Arrange these acids in increasing order of strength.

Crinoline and croquet are out. As yet, no political activists have thrown themselves in front of the royal horse on Derby Day. Even so, same historians can spat the parallels. It is a time of rapid technological change. It is a period when the dominance of the world’s superpower is coming under threat. It is an epoch when prosperity masks underlying economic strain. And, crucially, it is a time when policy-makers are confident that all is for the best in the best of all possible worlds. Welcome to the Edwardian Summer of the second age of globalisation.

Spare a moment to take stock of what’s been happening in the past few months. Let’s start with the oil price, which has rocketed to more than $\$$65 a barrel, more than double its level 18 months ago. The accepted wisdom is that we shouldn’t worry our little heads about that, because the incentives are there for business to build new production and refining capacity, which will effortlessly bring demand and supply back into balance and bring crude prices back to $\$$25 a barrel. As Tommy Cooper used to say, ‘just like that’. Then there is the result of the French referendum on the European Constitution, seen as thick-headed luddites railing vainly against the modem world. What the French needed to realise, the argument went, was that there was no alternative to the reforms that would make the country more flexible, more competitive, more dynamic. Just the sort of reforms that allowed Gate Gourmet to sack hundreds of its staff at Heathrow after the sort of ultimatum that used to be handed out by Victorian mill owners. An alternative way of looking at the French “non” is that our neighbours translate “flexibility” as “you’re fired”.

Finally, take a squint at the United States. Just like Britain a century ago, a period of unquestioned superiority is drawing to a close. China is still a long way from matching America’s wealth, but it is growing at a stupendous rate and economic strength brings geopolitical clout. Already, there is evidence of a new scramble for Africa as Washington and Beijing compete for oil stocks. Moreover, beneath the surface of the US economy, all is not well. Growth looks healthy enough, but the competition from China and elsewhere has meant the world’s biggest economy now imports far more than it exports. The US is living beyond its means, but in this time of studied complacency a current account deficit worth 6 percent of gross domestic product is seen as a sign of strength, not weakness. In this new Edwardian summer, comfort is taken from the fact that dearer oil has not had the savage inflationary consequences of 1973-74, when a fourfold increase in the cost of crude brought an abrupt end to a postwar boom that had gone on uninterrupted for a quarter of a century. True, the cost of living has been affected by higher transport costs, but we are talking of inflation at 2.3 percent and not 27 percent. Yet the idea that higher oil prices are of little consequence is fanciful. If people are paying more to fill up their cars it leaves them with less to spend on everything else, but there is a reluctance to consume less. In the 1970s, unions were strong and able to negotiate large, compensatory pay deals that served to intensify inflationary pressure. In 2005, that avenue is pretty much closed off, but the abolition of all the controls on credit that existed in the 1970s means that households are invited to borrow more rather than consume less. The knock-on effects of higher oil prices are thus felt in different ways - through high levels of indebtedness, in inflated asset prices, and in balance of payments deficits.

There are those who point out, rightly, that modern industrial capitalism has proved mightily resilient these past 250 years, and that a sign of the enduring strength of the system has been the way it apparently shrugged off everything - a stock market crash, 9/11, rising oil prices - that have been thrown at it in the half decade since the millennium. Even so, there are at least three reasons for concern. First, we have been here before. In terms of political economy, the first era of globalisation mirrored our own. There was a belief in unfettered capital flows, in free trade, and in the power of the market. It was a time of massive income inequality and unprecedented migration. Eventually, though, there was a backlash, manifested in a struggle between free traders and protectionists, and in rising labour militancy.

Second, the world is traditionally at its most fragile at times when the global balance of power is in flux. By the end of the nineteenth century, Britain’s role as the hegemonic power was being challenged by the rise of the United States, Germany, and Japan while the Ottoman and Hapsburg empires were clearly in rapid decline. Looking ahead from 2005, it is clear that over the next two or three decades, both China and India - which together account for half the world’s population - will flex their muscles. Finally, there is the question of what rising oil prices tell us. The emergence of China and India means global demand for crude is likely to remain high at a time when experts say production is about to top out. If supply constraints start to bite, any declines in the price are likely to be short-term cyclical affairs punctuating a long upward trend.

Which of the following best represents the key argument made by the author?

Unit of rate constant for a second order reaction is:

What is the value of Z for He⁺ ion?

A physical quantity is measured and the result is
expressed as nu where u is the unit used and n is the
numerical value. If the result is expressed in various
units then relation between n and u.

(a) n c< size of u . (b) n c< u^2

(c). n c<√u. (d) n c< 1/u

Which one of the following is an example of positive ion and negative ion that is isoelectronic with $F^{-}$?