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The correct statements among the following are:



I. Due to greater polarizing power of $L{i}^{+}$, $L{i}_{2}C{O}_3$ is most stable

II. $LiHC{O}_3$ does not exist as solid

III. $NaN{O}_3$ on strong heating gives $NaN{O}_2$ whereas $LiN{O}_3$ will give $L{i}_{2}O$

IV. Sodium & Potassium ions are involved in the transport of sugars and amino acids into the cells

V. $LiF$ is less soluble due to smaller hydration energy of $L{i}^{+}$ ion

Match the following:

$$\begin{array}{cc}\text{List- I}& \text{List - II}\\ \text{(Molecule)}& \text{(number of lone pairs on central atom)}\\ \left(A\right)N{H}_3& \text{(i) Two}\\ \left(B\right)H_{2}O& \text{(ii) three}\\ \left(C\right)Xe{F}_2& \text{(iii) zero}\\ \left(D\right)C{H}_4& \text{(iv) Four}\\ & \text{(v) One}\end{array}$$

Which of the following is a colorless complex ion?

Find the total number of oxygen atoms in $3\times {10}^3$ formula units of $\left[Ni\right(H_{2}O{)}_6]C{l}_2$.

(+) Glucose and (-) fructose can be differentiated by ?

The following cyclic polymerization is called

The order in which the following oxides are arranged according to decreasing basic nature is

Two moles of an ideal gas is heated at a constant pressure of one atmosphere from ${27}^{\circ }C$ to ${127}^{\circ }C$. If $C_{v,m}=20+{10}^{-2}TJ{K}^{-1}mo{l}^{-1}$, then $q$ and $\Delta U$ for the process are:

The ${p{K}_a}^o$of acetylsalicyclic acid (aspirin) is 3.5. The pH of gastric juice in the human stomach is about 2 to 3 and the pH in small intestine is about 8. Aspirin will be

If the dispersed phase is a
liquid and the dispersion medium is a solid, the

colloid is known as

[NCERT 1981; CBSE PMT 1989; KCET
1998]

If the velocity of hydrogen molecule is $5\times {10}^{4}cmse{c}^{-1}$, then its de-Broglie wavelength is

The work done by $200calorie$ of heat in isothermal expansion of ideal gas is:

Consider an endothermic reaction $X\to Y$ with the activation energies $E_b$ and $E_f$ for the backward and forward reactions, respectively. IN general

If P⁰ and P are the vapour pressure of a solvent and its solution respectively and N₁ and N₂ are the mole fractions of the solvent and solute respectively, then correct relation is

Identify 'Z' in the sequence:



$C_6{H}_{5}N{H}_2\underset{273K}{\overset{NaN{O}_2+HCl}{\to }}X\stackrel{CuCN}{\to }Y\underset{H^{+}/H_{2}O}{\overset{Boil}{\to }}$

The correct order of increasing acidic strengths is:

The diagram given below is a vapour pressure for a binary solution of A and B. In the solution,

A - B interactions are

The compound A, B and C in the following reaction sequence are (in the order A, B, C):

$C{H}_3-C{H}_2-OH\stackrel{PB{r}_3}{\to }\left(A\right)\stackrel{alc.KOH}{\to }\left(B\right)\stackrel{B{r}_2/CC{l}_4}{\to }\left(C\right)$

A neutral atom will have the lowest ionization potential when electronic configuration is:-

An element having the fcc lattice structure has a cell edge of 120 pm. The density of the element is $6.8g/c{m}^3$. How many atoms are present in 408 g of the element?

In a constant volume calorimeter, $3.5g$ of a gas with molecular weight 28 g/mol was burnt in excess of oxygen at $298K$. The temperature of the calorimeter was found to Increase from $298K$ to $298.45K$ due to the combustion process. Given that the heat capacity of the calorimeter is $2.5kJ/K$. The Numerical value for the enthalpy of combustion of the gas in kJ/mol is

Among the following, the ion with highest magnetic moment is .

In the standardization of $N{a}_2{S}_2{O}_3$ using $K_{2}C{r}_2{O}_7$ by iodometry, the equivalent weight of $K_{2}C{r}_2{O}_7$ is:

Find the molality of a 8 M NaOH solution having a density of 1 g/mL.

What would be the functional isomer of the compound

Pure 'X' is a colourless liquid but on standing changes to brown colour.'X' has no action on litmus but forms salt with HCl and H2SO4. It is steam volatile. Then 'X' would be

Correct order of electronegativity for the given elements is:

The number of stereoisomeric forms in which $\left[Co\right(N{H}_3{)}_{4}C{l}_2{]}^{+}$ ion can occur is:

Which condition is not satisfied by an ideal solution?

Use the following data to calculate second electron affinity of oxygen for the process

$O^{-}\left(g\right)+e^{-}\left(g\right)\to O^{2-}\left(g\right)$.

Heat of sublimation of $Mg\left(s\right)=147.7\text{kJ/mol}$

Ionisation energy of $Mg\left(g\right)$ to form

$M{g}^{2+}\left(g\right)=2189\text{kJ/mol}$

Bond dissociation energy for $O_2$ $=498.4\text{kJ/mol}$

First electron affinity of $O\left(g\right)=-141\text{kJ/mol}$

Heat formation of $MgO\left(s\right)=-601.7\text{kJ/mol}$

lattice energy of $MgO=-3791\text{kJ/mol}$

Which is the correct statement about proton?

Carbon and hydrogen in an organic compound are detected as:

When vapour of alcohol is passed over Ag powder at ${300}^{\circ }C$ the product is isobutene. Alcohol in this reaction will be:



$\left(a\right)C{H}_3-C{H}_2-\stackrel{OH}{\stackrel{|}{CH}}-C{H}_3\left(b\right)C{H}_3-2-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3$



$\left(c\right){}_{\underset{C{H}_3}{╱}}^{\stackrel{C{H}_3}{╲}}CH-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3\left(d\right)C{H}_3-\underset{C{H}_3}{\underset{|}{\stackrel{OH}{\stackrel{|}{C}}}}-C{H}_3$

When the mixture of $[A+B+C]$ is dissolved in $NaHC{O}_3,$ A dissolve in $NaHC{O}_3,$ $BandC$ remains as a residue. After that residue dissolves in $aq.NaOH,C$ dissolves in it and $B$ remains as residue. $A,B,C$ can be respectively.

The equation

$\underset{\left(aq\right)}{Mn{O}_4^{-}}+\underset{\left(aq\right)}{B{r}^{-}}\to \underset{\left(s\right)}{Mn{O}_2}+\underset{\left(aq\right)}{Br{O}_3^{-}}$

when balanced in a basic medium by oxidation number method will be :

Which among the following molecules is polar?

The edge length of a F.C.C. cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is

The highest stable oxidation state exhibited by sulphur in its compounds is:

The concentration in gms per litre of a solution of cane sugar (M=342) which is isotonic with a solution containing 6 gms of urea (M = 60) per litre is:

What is the loss in mass during the change: ${}_{3}L{i}^7{+}_1{H}^1\to 2{}_{2}H{e}^4+17.25MeV$

Among the following oxides, which has the maximum lattice energy?

On addition of 0.5 mL of solution of 10% NaCl to 20 mL of red gold sol in presence of 0.025 g of starch, the coagulation is just prevented. The gold number of starch is

Which of the following is an ionic compound?