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Which of the following represents Claisen - Schmidt reaction

Select the correct curve(s).

If v = velocity of electron in Bohr's orbit

r = Radius of electron n Bohr's orbit

P.E = Potential energy of electron in Bohr's orbit

K.E = Kinetic energy of electron in Bohr's orbit

Ethanol and dimethyl ether are examples of:

Primary and secondary valency of $Pt$ in $\left[Pt\right(en{)}_{2}C{l}_2]$ are

Which is the strongest base that can exist in water?

Benzyl bromide, on treatment with a nucleophile - triphenylphosphine, is then made to react with b-Butyl lithium - a strong base to give a yhosphorus ylid.

Which of the following would yield the hydrocarbon:

Alkynes could be synthesized by:

An inorganic compound (A) is made of two most occuring elements in the Earth's crust and has a polymeric tetrahedral network structure. With carbon, compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be

The ratio of number of atoms present in a simple cubic, body centered cubic and face centered cubic structure, respectively, are :

Which of the following is the Fischer projection of L – threonine (also known as 2S, 3R-2-amino- 3-hydroxy butanoic acid)?

Which of the following is the weakest acid, in the following compounds?

Inversion of sucrose $\left(C_{12}{H}_{22}{O}_{11}\right)$ is a first order reaction and is studied by measuring angle of rotation at different intervals of time $\underset{\text{d-Sucrose}}{C_{12}{H}_{22}{O}_{11}}+H_{2}O\stackrel{H^{+}}{\to }\underset{\text{d -Glucose}}{C_6{H}_{12}{O}_6}+\underset{\text{l -Fructose}}{C_6{H}_{12}{O}_6}$

$r_0$ = angle of rotation at the start, $r_t$ = angle of rotation at time ti, and $r_{\infty }$ = angle of rotation at the complete reaction, if 50% of sucrose undergoes inversion, then

Mark the oxide which is amphoteric in character

Which of the following free radical is most stable?

For the reaction $CO\left(g\right)+\frac{1}{2}{O}_2\left(g\right)\to C{O}_2\left(g\right),\Delta H$ and $\Delta S$ are $-283\text{kJ}$ and $-87{\text{J K}}^{-1}{\text{mol}}^{-1}$ respectively. It was intended to carry out this reaction at $1000,1500,3000$ and $3500\text{K}$. At which of these temperatures would this reaction be thermodynamically spontaneous?

Melting point is maximum for:

A mineral consists of an equimolar mixture of the carbonates of two bivalent metals. One metal is present to the extent of $12.5$ by weight. $2.8g$ of the mineral on heating lost $1.32g$ of $C{O}_2.$ What is the $\%$ by weight of the other metal?

An atom with high electron affinity generally has

The number of tripeptides formed by 3 different amino acids is:

When water is cooled to ice, its entropy

A green ball weighs 80 g and comes travelling towards you at 900 m/s. A photon of light emitted from green ball has a wavelength of $6\times {10}^{-7}$ m. Assuming that the error in the position of ball is the same as the wavelength of its photon, calculate error in the momentum (kgm/s) of the green ball.

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

The prefix and suffix used for -OH are respectively

The radial wave function for an orbital in a hydrogen atom is:

$\psi =\frac{1}{16\sqrt{3}}{\left(\frac{1}{a_0}\right)}^{\frac{3}{2}}\left[\right(x-1\left)\right(x^2-8x+12\left)\right]e^{-\frac{x}{2}}$

where, $x=\frac{2r}{a_0};a_0=$ radius of first Bohr's orbit. The minimum and maximum position of radial nodes from the nucleus are:

Which of the following sequence converts benzaldehyde into phenylacetaldehyde?



1: $PB{r}_3$

2: Mg in THF

3: $NaB{H}_{4}followedby{H}_3{O}^{+}$

4: $HCHOfollowedby{H}_3{O}^{+}$

5: PCC

Electron gain enthalpy depends on:

What is the hybridization of Xe in the product formed on reaction of XeF₄ with SbF₅?



SbF₅ के साथ XeF₄ की अभिक्रिया पर बने उत्पाद में Xe का संकरण क्या है?

The average osmotic pressure of human blood is 7.8 bar at 37⁰C. What is the concentration of an aqueous NaCl solution that could be used in the blood stream

A sample of chloroform before being used as an anaesthetic agent is tested by

The correct statement(s) for orthoboric acid is(are)

Calculate the solubility of $A_2{X}_3$ in pure water, assuming that neither kind of ion reacts with water. The solubility product of $A_2{X}_3,K_{sp}=1.1\times {10}^{-23}.$

The degree of hydrolysis and pH of $0.1M$ sodium acetate solution are:

Hydrolysis constant of sodium acetate is $5.6\times {10}^{-10}$.

A 0.6% solution of urea (molar mass = 60) would be isotonic with

Which one of the following is not a member of 3d-transition series?

In a living organism, the C-14 concentration

Which of the following behaves as both oxidising and reducing agents

The order of the oxidation state of the phosphorous atom in $H_{3}P{O}_2,H_{3}P{O}_4,H_{3}P{O}_3$ and $H_4{P}_2{O}_6$ is:

The following reaction is performed at 298K

$2NO\left(g\right)+O_2\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)$

The standard free energy of formation of NO(g) is 86.6kJ/mol at 298K. What is the standard free energy of formation of $N{O}_2\left(g\right)$ at 298 K? $K_p=1.6\times {10}^{12}$

The spin magnetic momentum of electrons in an ion is 4.84 BM. Its total electronic spin will be

Then the formula of C₃H₉N is

\(N_2 ~+ ~O_2 ~\rightleftharpoons~ 2NO ~+~ (-Q cals)\)

In the above reaction which is the essential condition for the higher production of $NO$

Hybridisation of carbon atom in $C{O}_3^{2-}$ is

A pure sample of $N_2{O}_5$ gas contains 0.01 moles. Find the volume occupied by the gas sample at standard temperature and pressure conditions (STP).

While denoting an organic compound in the form , which type of representation is used?

The average velocity of a gas is $400m{s}^{-1}$.Find the rms velocity of the gas.

How many C-atoms are present in 2.6 micromoles of $C_6{H}_{12}{O}_6$?

The reaction between ethylene and bromine is an example of:

Diethylether may be regarded as an anhydride of:

During the process of electrolytic refining of copper, some metals present as impurity settle as anode mud. These are-