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Which of the following structures represents neoprene polymer ?

Acetylene when reacts with two molecules of HBr, it gives :

During the discharge of a lead storage battery the density of sulphuric acid fell from $1.294$ to $1.139{\text{g mL}}^{-1}$ . $H_{2}S{O}_4$ of density $1.294{\text{g mL}}^{-1}$ is 39% and that of density $1.139{\text{g mL}}^{-1}$ is 20% by weight. The battery holds $3.5\text{L}$ of acid and the volume practically remains constant during the discharge. Calculate the number of Ampere hours for which the battery must have been used. The discharging reactions are:

$Pb+S{O}_4^{2-}\to PbS{O}_4+2e^{-}\left(\text{anode}\right)$

$Pb{O}_2+4H^{+}+S{O}_4^{2-}+2e^{-}\to PbS{O}_4+2H_{2}O\left(\text{cathode}\right)$

Henrys law constant for $C{O}_2$ in water is $1.6\times {10}^8$ Pa at 298K.

Calculate quantity of $C{O}_2$ in 500 mL of soda water when packed under 2.5 atm $C{O}_2$ pressure at 298K.

The correct order of acid character of the following compounds is:

For the elementary reaction $A+B\to 2C$ the experiment data suggested that $\text{Rate}\left(r\right)=k\left[A\right]\left[B\right]$. The molecularity and order of the reaction are respectively:

Which of the following has an aldehyde functional group?

Which of the following dilute solutions have vant hoff factor equal to 4?

(Assume complete ionisation)

Calculate n-factor of $N{a}_{3}P{O}_4$ in the following reaction.

\(2 Na_3PO_4\) +\(3 BaCl_2\) $\to$ 6NaCl + $B{a}_3(P{O}_4{)}_2$

Ethyl amine undergoes oxidation in the presence of to form

[CPMT 1985]

Which of the following compounds is a peroxide?

A 2 $V$ battery is connected across the points A and B as shown in the figure given below. Assuming that the resistance of each diode is zero in forward bias and infinity in reverse bias, the current supplied by the battery when one of the diodes has its positive terminal is connected to $A$ (as shown in figure) is

Match each set of hybrid orbitals from LIST -I was complex(es given in LIST - II.

$\begin{array}{cc}\text{LIST-I}& \text{LIST-II}\\ P.ds{p}^2& 1.[Fe{F}_6{]}^{4-}\\ Q.s{p}^3& 2.\left[Ti\right(H_{2}O{)}_{3}C{l}_3]\\ R.s{p}^3{d}^2& 3.\left[Cr\right(N{H}_3{)}_6{]}^{3+}\\ S.d^{2}s{p}^3& 4.[FeC{l}_4{]}^{2-}\\ & 5.Ni(CO{)}_4\\ & 6.\left[Ni\right(CN{)}_4{]}^{2-}\end{array}$

Aniline reacts with excess $B{r}_2/H_{2}O$ to give product identify the major product:

The initial rate of hydrolysis of methyl acetate (1M) by a weak acid (HA, 1M) is 1/100th of that of a strong acid (HX, 1M), at ${25}^{o}C.$ The $K_a$ of HA is

On adding a white solid ‘X’ to water, a hissing sound is heard and a lot of heat is produced along with the formation a product ‘Y’.

The solution of ‘Y’ is applied on the walls of buildings during whitewashing. It reacts with carbon dioxide in air to form 'Z'. This Z gives a shiny finishing to the walls after 2-3 days of whitewashing.



(iv) The chemical formula of product Z is ______.

Which of the following are benzylic alcohols?
(a) $C_6{H}_5-C{H}_2-C{H}_{2}OH$
(b) $C_6{H}_5-C{H}_{2}OH$
(c) $C_6{H}_5-\underset{\underset{C{H}_3}{|}}{CH}-OH$
(d) $C_6{H}_5-C{H}_2-\underset{\underset{C{H}_3}{|}}{CH}-OH$

• What is shielding or screening effect?

In the $V-T$ graph of a gas shown below, process $P\text{to}R$ represents:

The complex ion that has the minimum wavelength of absorption in the visible region is: