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Number of moles of sulphur present in 1 mole of $H_{2}S{O}_4$ are?

Which of the following diene will have the least heat of hydrogenation?

Ground state electronic configuration of P atom can be represented as

Which of the following expressions is correct for the rate of reaction given below? $5B\stackrel{-}{r}\left(aq\right)+Br{0}_3^{-}\left(aq\right)+6H^{+}\left(aq\right)\to 3B{r}_2\left(aq\right)+3H_{2}O\left(l\right)$

$\left(a\right)\frac{\Delta \left[B{r}^{-}\right]}{\Delta t}=5\frac{\Delta \left[H^{+}\right]}{\Delta t}\left(b\right)\frac{\Delta \left[B{r}^{-}\right]}{\Delta t}=\frac{6}{5}\frac{\Delta \left[H^{+}\right]}{\Delta t}\left(c\right)\frac{\Delta \left[B{r}^{-}\right]}{\Delta t}=\frac{5}{6}\frac{\Delta \left[H^{+}\right]}{\Delta t}\left(d\right)\frac{\Delta \left[B{r}^{-}\right]}{\Delta t}=6\frac{\Delta \left[H^{+}\right]}{\Delta t}$

The equivalent weight of chlorine molecule in the given equation is

$3C{l}_2+6NaOH\to 5NaCl+NaCl{O}_3+3H_{2}O$

In which of the following reactions correct product is given?

Which of the following derivatives of alcohols is unstable in an aqueous base?

Gas (E) is

A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speed of light is $3\times {10}^{8}m{s}^{-1}$. The final momentum of the object is

Calculate the no. Of Na2CO3 molecule and no. Of oxygen atoms in 21.2g of Na2CO3

Please!!!!!

According to MOT, which of the following species has only $\pi$ electrons involved in bonding?

If the shortest wavelength of the Lyman series of H atom is x, then the wavelength of the first line of Balmer series of H atom will be:

In which of the following cases, the reaction goes farthest to completion?

The kinetic energy of an electron is $4.55\times {10}^{-25}J$. The mass ofelectron is $9.1\times {10}^{-31}kg$. Calculate velocity of the electron.

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1:8. The ratio of number of their molecule is

Upon reaction of ethanol with ethanoic acid in concentrated $H_{2}S{O}_4$, a compound of ___is produced.

Which of the following orbitals has a zero probability of finding electrons in the $XY$ plane?

Two charges q1 and q2 are placed 30 cm apart as shown. A third charge q3 is moved along the arc of a circle of radius 40 cm from C to D. The change in the potential energy of the system is $\frac{q_3}{4\pi {\in }_0}k$, where k is

Match the column I and II.

Which of the following compounds will not undergo Friedal-Crafts reaction easily?

Which alky1 halide is preferentially hydrolysed by $S_{N}1$ mechanism?

Given:
$E_{A{g}^{+}/Ag}^0=0.80V$,
$E_{M{g}^{2+}/Mg}^0=-2.37V$,
$E_{C{u}^{2+}/Cu}^0=0.34V$,
$E_{H{g}^{2+}/Hg}^0=0.79V$
Which of the following statements is/are correct ?

The correct order of acidic strength for the following compounds is:
(A) Phenol
(B) p-cresol
(C) m-nitrophenol
(D) p-nitrophenol

Select the incorrect overlap if $z$-axis is the inter-nuclear axis:

Salts of sorbic acid and propionic acid are used as:

In the reaction scheme shown below, Q, R, and S are the major products.

The correct structure of:

Arrange the following.
$Ca{H}_2,Be{H}_2$ and $Ti{H}_2$ in order of increasing electrical conductance.

LiH, NaH and CsH in order of increasing ionic character.

H - H, D - D and F - F in order in order of increasing bond dissociation enthalpy.

$NaH,mg{H}_2$ and $H_{2}O$ in order of increasing reducing property.

For the reaction, 4NH₃ + 5H₂O -----> 4NO + 6H₂0 when 1 mol of ammonia and 1 mol of O₂ are allowed to react then

(1) 1 mol of H₂O is produced

(2) 1 mol of NO is produced

(3) 1 mol of O₂ is consumed

(4) 1 mol of NH₃ is consumed

Cathode rays consist of

The number of neutrons released when ${}_{92}^{235}U$ undergoes fission by absorbing ${}_0^{1}n$ and $\left({}_{56}^{144}Ba{+}_{36}^{89}Kr\right)$ are formed