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Which
of the following is most effective in coagulating a ferric hydroxide sol [MP
PET 1993, 97; M

An oxide of nitrogen has a molecular weight 92. Find the total number of electrons in one gram mole of that oxide

Oxygen can form bonds.

Assertion: Frenkel defect doesn’t have any effect on density of the crystal.

Reason: Dislocated cation occupies the interstitial site

Which of the following exhibits the weakest intermolecular forces

Compressibility factor for $C{O}_2$ at $400\text{K}$ and $71.0\text{bar}$ is $0.8697$. Molar volume of $C{O}_2$ under these conditions is:

Find the product 'X' in the given reaction :

$C{H}_4+H_{2}O\underset{△\left(1273K\right)}{\overset{Ni}{\to }}X+3H_2$

What is the molality of a solution having 14.2 gm of $N{a}_{2}S{O}_4$ dissolved in 1 liter solution?

Which of the following relations do not represent the correct relation of the potential energy of an electron in the $n^{th}$ shell of an hydrogen atom?

Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution

[MP PET 2001]

Atomic number of $Ag$ is $47$. In the same group, the atomic number of elements placed above and below $Ag$ in the long form of periodic table will be $x$ and $y$ respectively. Give the value of $\frac{x+y}{12}$.

Which of these methods would serve to prepare 1-Phenyl-2-propanol?

$\begin{array}{cc}\text{a.}& \text{Addition of benzyl Grignard reagent to acetaldehyde (ethanal)},\\ & \text{followed by hydrolysis.}\\ \text{b.}& \text{Addition of phenyl lithium to propylene oxide (methyloxirane)},\\ & \text{followed by hydrolysis.}\\ \text{c.}& \text{Addition of phenyl Grignard reagent to acetone (2- propanone)}\\ & \text{followed by hydrolysis.}\\ \text{d.}& \text{Acid- catalysed hydration (addition of water to) of 2-Phenyl-1-}\\ & \text{propene.}\\ \text{e.}& \text{Addition of methyl Grignard reagent to acetophenone (methyl phenyl}\\ & \text{ketone), followed by hydrolysis.}\\ \text{f.}& \text{Addition of methyl Grignard reagent to phenylacetaldehyde, followed}\\ & \text{by hydrolysis.}\end{array}$

Which of the following has longest C-O bond length? (Free C-O bond length in CO is 1.128 A.)

Which of the following reaction(s) occur during calcination?

When an electron jumps from L to K shell

The correct order of boiling point of $K,Ca,Sc$ is:

Acetic anhydride is prepared by:

On a ship sailing in the Pacific ocean, where the temperature is 23.4${}^{\circ }$C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches the Indian ocean where the temperature is 26.1${}^{\circ }$C ?

Which of the following pairs is/are tautomers of each other?

Crystal field splitting energy (CFSE) for the complex $\left[Fe\right(CN{)}_4{]}^{-}$ is ____ ,when $\Delta >P$.

Which of the following mixtures in aqueous solution acts as a buffer?

The correct structure of 2-Ethyl-3-methylhexa-1,4-diene is:

Ionic radii of $M{g}^{2+}$ and $O^{2-}$ ions are 66 pm and 140 pm respectively. The type of interstitial void and coordination number of $M{g}^{2+}$ ion respectively are

Which of the following gem diols is stable:



$\left(a\right)H_{3}C-\stackrel{OH}{\stackrel{|}{\underset{O{H}_3}{\underset{|}{C}}}}-H\left(b\right)B{r}_{3}C-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-H$

$\left(c\right)F_{3}C-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-H\left(d\right)H_5{C}_6-\stackrel{OH}{\stackrel{|}{\underset{OH}{\underset{|}{C}}}}-C_6{H}_5$

In the following reactions, the major product W is:

HNCO (isocyanic acid) has following resonating structures:

$\underset{I}{H-N=C=O}\leftrightarrow \underset{II}{H-\stackrel{\ominus }{N}-C\equiv \stackrel{\oplus }{O}}\leftrightarrow \underset{III}{H-\stackrel{\oplus }{N}\equiv C-\stackrel{\ominus }{O}}$

The order of stability is:

The close packing arrangement of ABCABC in 3-D refers to which of the following?

A gas sample is cooled and loses 65 J of heat. The gas contracts as it cools and work done on the system equal to 20 J. What are q, w and $△U$ ?

Which of the following molecules has the lowest bond angle?

Predict the major product 'A' and 'B'

The volume of the HCP unit cell is

The average molecular speed is the greatest in which of the following gas samples?

The momentum of a particle with de-Broglie wavelength $1\stackrel{\circ }{A}$ is: $(h=6.62\times {10}^{-34}Js)$

Which of the following is the most powerful oxidizing agent

The temperature to which a gas must be cooled before it can be liquefied by compression is called as___.

A cylinder contains $0.9$ moles of benzene vapour and $0.1$ moles of toluene vapour at $50{}^{o}C$ . The pure vapour pressure of benzene liquid and the pure vapour pressure of toluene liquid at $50{}^o$C are 600 torr and 200 torr respectively.

What is the mole fraction of liquid benzene in the solution?

Arrange the following alkenes in the order of their stability.

1. 389.6

The branch of electrometallurgy comprises

An alkyne can be reduced to alkene via:

Ammonia is manufactured by the:

An advice is given by the government of India to all the pharmaceutical companies for the manufacture of a medicine having a concentration of 2700 ppb used for treating Covid-19 patients. The concentration of medicine in %(w/w) is: