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In Zeise's salt $C=C$ bond length is:
Note: $\left\{\begin{array}{c}C-C\text{bond length in ethane is}1.54\stackrel{\circ }{A}\\ C=C\text{bond length in ethene is}1.34\stackrel{\circ }{A}\\ C\equiv C\text{bond length in ethyne is}1.20\stackrel{\circ }{A}\end{array}\right\}$

Which of the following exhibits the weakest inter-molecular forces?

As the temperature is raised from 20${}^{\circ }$ C to 40${}^{\circ }$ C the average kinetic energy of neon atoms changes by a factor of which of the following

Ethylene may be obtained by dehydration of which of the following with concentrated$H_{2}S{O}_{4}at160-{170}^{0}C$

Why $PC{l}_5$ exist but not $NC{l}_5$

In a Millikan's oil drop experiment, the charge on an oil drop is calculated to be $-6.4\times {10}^{-19}\text{C}$. The number of excess electrons on the drop is:

How small are electrons?

Rotation at high speed makes the colloid settle down and the impurities remain in solution. What is this process called?

For which of the following sets of four quantum numbers, an electron will have the highest energy?

Properties of solution which depend on only number of solute particles but not on nature of solute are called

The rate of esterification of alcohols is more for:

Which of the following statement is not true about low density polyethene?

(a) Tough

(b) Hard

(c) Poor conductor of electricity

(d) Highly branched structure

Question 46
Give an example of a material used for making semipermeable membrane for carrying out reverse osmosis.

The staggered form of ethane has:

Calculate the $pOH$ and $pH$ of a 0.1 M $C{H}_{3}COOH$ solution ($K_a$ = $1.8\times {10}^{-5}$). There is $7.5\times {10}^{-3}\%$ yield of $O{H}^{-}$ ions in the given reaction $C{H}_{3}CO{O}^{-}+H_{2}O\rightleftharpoons C{H}_{3}COOH+O{H}^{-}$

What will be the $K_b$ value of a weak base (BOH) of which a 0.1 M solution has a pH of 8, when it is half neutralized with 0.1 M $HN{O}_3$?

For zero order reaction, the integrated rate equation is:

In which of the following molecules bond angle is the largest?

In Haber's process, the equivalent weight of nitrogen gas is:

What is obtained when phenol is treated with Br₂ in CS₂?

Predict the nature of P in the following reaction

The compound X on heating gives a colourless gas . The residue is dissolved in water to obtain Y. Excess CO₂ is bubbled through aqueous solution of Y,Z is formed . Z on gentle heating gives back X. The compound X is:

In an experiment during the analysis of a carbon compound, 145 l of $H_2$ was collected at 760 mm Hg pressure and ${27}^{\circ }$C temperature. The mass of $H_2$ is nearly

Protein is a polymer of:

The order of decreasing reactivity towards an electrophilic reagent, for the following, would be:

(a) Benzene
(b) Toluene
(c) Chlorobenzene
(d) Phenol

Which of the following is/are wrong order(s)?

Equation $H_{2}S+H_2{O}_2\to S+2H_{2}O$ represents

Which of the following are aromatic?

In which of the following compound transition metal has 0 oxidation state

Which of the following compounds exhibits geometrical iosmerism?

The following figure represents the liquid drop model of nuclear fission. The energies of these states are $E_1,E_{2}and{E}_3$ respectively. Which option is correct?

Calculate the maximum work done, when pressure on $14gram$ of hydrogen gas is reduced from $20$ to $2atm$ at a constant temperature of $273K$. Consider the gas behave ideally.

250 ml solution of unknown molarity of CuSO₄ in water was electrolysed using platinum anode and copper cathode after the passage of a current of 2×10^-3 A for 19.3 minute the absorbance power of CuSO₄(aq.) was reduced to 50% of it's original value . The molarity of CuSO₄ was :

The correct match is

A solid crystal is composed of X, Y and Z atoms. Y atoms are occupying 50% of octahedral voids, whereas X atoms are occupying the 100% tetrahedral void with Z atoms present in the ccp array arrangement, then the formula of the compound in the given crystal is

Calculate the number of sodium atoms present in $5.3\text{g}$ of $N{a}_{2}C{O}_3$.

In a face centred cubic cell, an atom at the face contributes to the unit cell

[Karnataka (Engg./Med.) 2000; AFMC 2001]

The coulombs of electricity required for reduction of 1 mole of $Mn{O}_4^{-}$ to $M{n}^{2+}$ are

To 1L solution containing 0.1 mol each of $N{H}_3$ and $N{H}_{4}Cl,0.05$ mol of NaOH is added. The change in pH will be $(p{K}_{b}forN{H}_3=4.74)$