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The correct order of increasing $+I$ effect is :

Which of the following is/are false about diamond?

Which of the following compounds contain an electron withdrawing group ?

Which of the following is true for carbocations?

A gas occupies volume of $580mL$ at $17{}^{o}C.$ It is heated to $100{}^{o}C$ at constant pressure. Calculate the final volume of the gas -

If $\alpha$ is the degree of dissociation of $N{a}_{2}S{O}_4$, the vant Hoff's factor (i) used for calculating the molecular mass is

Cimetidine acts as an ________ drug.

Calculate the minimum and the maximum number of electrons which may have magnetic quantum number, $m=+1$ and spin quantum number, $s=-\frac{1}{2}$ in chromium $\left(Cr\right)$.

An alkene "A" on reaction with $O_3$ and $Zn–$$H_{2}O$ gives propanone and ethanal in equimolar ratio. Addition of $HCl$ to the alkene "A" gives "B" as the major product. The structure of the product "B" is:

Sulfuryl chloride $\left(S{O}_{2}C{l}_2\right)$ reacts with water to give a mixture of $H_{2}S{O}_4$ and HCl. How many moles of baryta would be required to neutralize the solution formed by adding 1 mole of $S{O}_{2}C{l}_2$ to excess of water ?

Two glass bulbs A and B are connected by very small tube having a stop cock. Bulb A has a volume of 100 ml and contained the gas while bulb B was empty and has a volume of 150 ml. On opening the stop cock, the pressure of the gas in bulb A will fall down to___.

The species present in the solution when $C{O}_2$ is dissolved in water are:

Which of the following represents the correct order of increasing first ionization enthalpy for $Ca$, $Ba$, $S$, $Se$ and $Ar$?

Which of the following molecule does not produce $HCl$ as one of the hydrolysed product?

The equilibrium constant for the reaction in aqueous solution

$H_{3}B{O}_3\left(aq\right)+glycerin\left(aq\right)\rightleftharpoons (H_{3}B{O}_3-glycerin)\left(aq\right)is0.90$.

How many moles of glycerin should be added per litre of $0.10M{H}_{3}B{O}_3$ so that $80\%$ of the $H_{3}B{O}_3$ is converted to the boric acid -glycerin complex?

Two metallic oxides contain 27.6 % and 30 % oxygen respectively. If the formula of the first oxide is $X_3{O}_4$, what will be the formula of the second oxide?

For the gaseous elementary reaction:

$2A\left(g\right)+B\left(g\right)⟶\text{product}$ , if the pressure is increased three times keeping temperature and volume constant then the rate of reaction will be increased by how many times?

What is the threshold below which, if the pH of rain water drops, it is called ‘acid rain’?

The balanced equation for the preparation of $NaBr$ is as follows:

$Fe+B{r}_2\to FeB{r}_2\text{…(i) (yield: 100 \%)}$

$3FeB{r}_2+B{r}_2\to F{e}_{3}B{r}_8\text{...(ii) (yield: 100 \%)}$

$F{e}_{3}B{r}_8+4N{a}_{2}C{O}_3\to 8NaBr+4C{O}_2+F{e}_3{O}_4\text{…(iii) (yield: 60 \%)}$

Calculate the mass of iron required to produce $2.06\times {10}^3\text{g}$ of $NaBr$.

(Considering $N{a}_{2}C{O}_3$ and $B{r}_2$ to be present in excess)

(molar mass of $Fe=56\text{g/mol},Br=80\text{g/mol},Na=23\text{g/mol}$)

Picric acid is[CPMT 1971, 80, 81; DPMT 1983;MP PMT 1990; BHU 1996]

In the following questions two Statement-1 (Assertion) and Statement-2 (Reason) are provided. Each questions has 4 choices (a), (b), (c) and (d) for its answer, out of which ONLY ONE is correct. Mark your responses from the following options:

Statement- 1: 1-Butene on reaction with HBr in the presence of a peroxide produces 1-bromobutane.

Statement- 2: It involves the formation of a primary radical.

Which of the following are true for n type semiconductor?

When benzoic acid dissolve in benzene, the observed molecular mass is:

$C{a}_2{B}_6{O}_{11}+N{a}_{2}C{O}_3\stackrel{Fused}{\to }\left(A\right)+\left(B\right)+CaC{O}_3\left(A\right)+C{O}_2\to \left(B\right)+N{a}_{2}C{O}_3\text{Solution}\left(B\right)+Conc.HCI\to NaCI+Acid\downarrow H_{2}O\left(C\right)\underset{heated}{\overset{Strongly}{\to }}\left(D\right)\text{Acid}\left(C\right)\left(D\right)+CuS{O}_4\underset{inflame}{\overset{Heated}{\to }}\text{Blue coloured}\left(E\right)\text{compound}\text{compound (E) is -}$

Regarding X and Y the correct statements are

A. Both X and Y are transitional elements

B. Atomic size of Y < Atomic size of X

C. Y is also catalyst in Sabatier - Senderen's reaction

D. X is also a catalyst in dehydrogenation of alcohols

Nylon - 6,6 is a

Which of the following diagrams is of impurity defect?

If uncertainty in position and momentum of a particle are numerically equal, then the uncertainty in the speed of the particle should be:

Which of the following reaction will not be affected by increasing the pressure?

The major product formed in the following reaction is :

A metallic element crystallizes into a lattice containing a sequence of layers of ABABAB. . . .Percentage of empty space (by volume) is

In $C+H_{2}O⟶CO+H_2,H_{2}O$ acts as a:

Cyclobutylamine is treated with sodium nitrite and aqueous $HCl$ at $0-5^{\circ }C$. The products formed are:

Which one of the following ions will be smallest in size?

An element A has 3 electrons in the outermost orbit and element B has 6 electrons in the outermost orbit. What will be the formula of the compound formed?

Blood has been found to be isotonic with

Consider the following partially labelled figure for an ideal binary solution of benzene and toluene and answer the following questions:

What is $p_{\text{toluene}}^{\circ }\left({25}^{\circ }\text{C}\right)$?

Let the bond order of ${O_2}^{2-}$ be X and that of $CO$ be Y. Then the value of XY is _____?

Which of the following will show tautomerism?

In the detection of carbondioxide gas, lime water turns milky due to the formation of:

Among the following a natural polymer is



[MP PET 1993; BCECE 2005]

A non ideal solution was prepared by mixing 30 ml chloroform and 50 ml acetone. The volume of mixture will be

The first and second dissociation constant of an acid $H_{2}A$ are $1.0\times {10}^{-5}$ and $5.0\times {10}^{-10}$ respectively. The overall dissociation constant of the acid will be: