The reaction of C$_6$H$_5$CH$=$CHCH$_3$ with HBr produces

In Duma’s method for estimation of nitrogen, $0.25$ g of an organic compound gave $40$ mL of nitrogen collected at $300K$ temperature and $725$ mm pressure. If the aqueous tension at $300K$ is $25$ mm, the percentage of nitrogen in the compound is?

The K$_{sp}$ of Ag$_2$CrO$_4,$AgCl, AgBr, and AgI are respectively, $1.1 \times 10^{-12}, 1.8 \times 10^{-10}, 5.0 \times 10^{-13}$ and $8.3 \times 10^{-17}.$Which one of the following salts will precipitate last if AgNO$_3$ solution is added to the solution containing equal moles of NaCl, NaBr, NaI, and Na$_2$CrO$_4?$

Bithionol is generally added to the soaps as an additive to function as a/an

‘Metals are usually not found as nitrates in their ores’. Out of the following two (a and b) reasons, which is/are true for the above observation?$\\$(a) Metal nitrates are highly unstable.$\\$(b) Metal nitrates are highly soluble in water.

The correct bond order in the following species is

The species Ar, K$^+$ and Ca$^{2+}$ contain the same number of electrons. In which order do their radii increase?

The activation energy of a reaction can be determined from the slope of which of the following graphs?

Which of the following pairs of ions are isoelectronic and isostructural?

An organic compound ‘X’ having molecular formula C$_5$H$_{10}$O yields phenyl hydrazone and gives a negative response to the iodoform test and Tollen’s test. It produces n-pentane on reduction. ‘X’ could be

Which of the following options represents the correct bond order?

Treatment of cyclopentanone O with methyl lithium gives which of the following species?

The electrolytic reduction of nitrobenzene in strongly acidic medium produces

Magnetic moment 2.84 BM is given by (At. no. Ni = 28, Ti = 22, Cr = 24, Co = 27)

A given metal crystallizes out with a cubic structure having an edge length of $361$ pm. If there are four metal atoms in one unit cell, what is the radius of one atom?

Which of the following is the most correct electron displacement for a nucleophilic reaction to take place?

Which one of the following electrolytes has the same value of van’t Hoff’s factor (i) as that of $Al_2(SO_4)_3$ if all are 100$\%$ ionized?

Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other?

The total number of π-bond electrons in the following structure is

Solubility of the alkaline earth metal sulphates in water decreases in the sequence:

The maximum bond angle at nitrogen is present in which of the following?

If the value of an equilibrium constant for a particular reaction is $1.6 \times 10^{12},$ then at equilibrium the system will contain

The number of d-electrons in Fe$^{2+} (Z = 26)$ is not equal to the number of electrons in which one of the following?

In which of the following compounds, the C—Cl bond ionization shall give the most stable carbonium ion?

A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as

Consider the following compounds below. Hyperconjugation occurs in

The reaction below is called

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give a test of chloride ions with silver nitrate at $25^{\circ}C?$

A mixture of gases contains H$_2$ and O$_2$ gases in the ratio of 1:4 (w/w). What is the molar ratio of the two gases in the mixture?

Which of the following processes does not involve oxidation of iron?

Because of lanthanoid contraction, which of the following pairs of elements have nearly the same atomic radii? (Numbers in the parenthesis are atomic numbers.)

Which of the following statements is correct for a reversible process in a state of equilibrium?

The angular momentum of an electron in a $d$-orbital is equal to

The boiling point of 0.2 mol kg$^{-1}$ solution of X in water is greater than the equimolal solution of Y in water. Which one of the following statements is true in this case?

The function of the ‘Sodium pump’ is a biological process operating in each and every cell of all animals. Which of the following biologically important ions is also a constituent of this pump?

Given the three structures given below:$\\$The enthalpy of hydrogenation of these compounds will be in the order as

The enolic form of ethyl acetoacetate as below has:

Biodegradable polymer which can be produced from glycine and aminocaproic acid is

Which of the following species contains equal number of $\sigma$- and $\pi$-bonds?

Which of these statements about $[$Co(CN)$_6]^{3-}$ is true?

Which one is not equal to zero for an ideal solution?

Which property of colloidal solution is independent of charge on the colloidal particles?

Which of the given compounds can exhibit tautomerism?

When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is

A single compound of the structure is obtainable from ozonolysis of which of the following cyclic compounds?