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In a reaction A+B₂ ----------> AB₂

Identify the limmiting reagent if any in the following reaction mixtures.

1) 300 atoms of A+ 200 molecules of B

2) 2mol A+ 100 mol B

3) 100 atoms of A+ 100 molecules of B

4) 5 Mol of A+ 2.5 mol B

5) 2.5 mol A + 5 mol of B

The basic character of oxides MgO, SrO, K2O, NiO, Cs2O increase in the order

For the reaction, $Fe(N{O}_3{)}_3+N{a}_{2}C{O}_3\to F{e}_2(C{O}_3{)}_3+NaN{O}_3$ Initially if 2.5 moles of $Fe(N{O}_3{)}_2$ and 3.6 moles of $N{a}_{2}C{O}_3$ is taken. If 6.3 moles of $NaN{O}_3$ is obtained then $\%$ yield of given reaction will be:

Question 53

Match the species in Column I with the geometry/shape in Column II.

$\begin{array}{cccc}& \text{Column~I}& & \text{Column~II}\\ A.& H_3{O}^{+}& 1.& \text{Linear}\\ B.& HC\equiv CH& 2.& \text{Angular}\\ C.& CL{O}_2^{-}& 3.& \text{Tetrahedral}\\ D.& N{H}_4^{+}& 4.& \text{Trigonal~bipyramidal}\\ & & 5.& \text{Pyramidal}\end{array}$

Maximum extent of steric inhibition of resonance can be expected in

${}_1^{1}H$, ${}_1^{2}H$ and ${}_1^{3}H$ differ in their

$200c.c.$ of a gas measured at S.T.P. has a mass of $0.268g$. Molecular weight of the gas is:

Write the formulae for the following compounds:

Mercury(II) chloride

Nickel(II) sulphate

Tin(IV) oxide

Thallium(I) sulphate

Iron(III) sulphate

Chromium(III) oxide

A certain oxide of iodine has been found to contain iodine and oxygen. The ratio ioidine : oxygen is 254 : 112. On being dissoved in water this oxide can produce ?

Which of the following group 13 elements oxide is acidic in nature?

Which of the following statements is incorrect about rate of reaction ?

The rate of effusion of LPG (a mixture of n-butane and propane) is 1.25 times that of $S{O}_3$. Hence, mass fraction of n-butane in LPG is :

If the diameter of a carbon atom is 0.15 nm, calculate the number of carbon atoms which can be placed side by side in a straight line across length of scale of length 20 cm long.

Which of the following compound would yield trialkyl borane as shown below when treated with $B{H}_3$ and THF ?

The equivalent weight of $MnS{O}_4$ is half its molecular weight when it is converted to
(IIT-JEE, 1988)

All bonds in benzene are equal due to?

Calculate the total number of electrons present in a pure sample of $H_{2}S{O}_4,$ if 5 moles of oxygen are present in the sample.

Ethylamine can be obtained by the

[CPMT 1985]

For the elementary reaction 2A $\rightleftharpoons$ B,The forward and backward rate constants are $k_1$ and $k_2$ respectively. Then the rate of disappearance of A is equal to:

The incorrect statement about DDT is

The shape of an orbital is given by the quantum number

A water sample has ppm level concentration of the following metals: Fe= 0.2; Mn= 5.0; Cu= 3.0; Zn= 5.0. The metal that makes the water sample unsuitable for drinking is:

Which of the following compounds has a zero dipole moment?

A new carbon-carbon bond formation is possible in

[IIT-JEE 1998]

Which among the following is colourless?

Which of the following solutions has highest osmotic pressure?

On heating potassium permangante, one of the following compound is not obtained.

The mineral hawleyite, one form of CdS, crystallizes in one of the cubic lattices, with edge length 5.87Å. The density of hawleyite is 4.63 g cm-3. The Schottky defect in g cm^-3 is (atomic mass of Cd = 112.41 and 'S' = 32)

A metal is present in plants, bones, egg shells and sea shells. It is also used to remove oxygen from molten steel. The metal is

Question 22

Arrange s, p and d subshells of a shell in the increasing order of effective nuclear charge $\left(Z_{eff}\right)$ experienced by the electron present in them.

The compound that has the least heat of decomposition among the following is

Thermal decomposition of gaseous $X_2$ to gaseous X at 298 K takes place according to the following equation:
$X_2\left(g\right)\rightleftharpoons 2X\left(g\right)$
The standard reaction Gibbs energy, ${\Delta }_r{G}^0,$ of this reaction is positive. At the start of the reaction, there is one mole of $X_2$ and no X. As the reaction proceeds, the number of moles of X formed is given by $\beta$. Thus, ${\beta }_{equilibrium}$ is the number of moles of X formed at equilibrium. The reaction is carried out at a constant total pressure of 2 bar. Consider the gases to behave ideally. (Given: R = 0.083 L bar $K^{-1}mo{l}^{-1}$)

The equilibrium constant $K_p$ for this reaction at 298 K, in terms of ${\beta }_{equilibrium},$ is:

What is meant by the conjugate acid-base pair? Find the conjugate acid/base for the following species:
$HN{O}_2,C{N}^{-},HCl{O}_4,F^{-},O{H}^{-},C{O}_3^{2-}$, and $S^{-2}$

Which decomposes on heating ?

A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?
(a) Thiosulphato
(b) Oxalato
(c) Glycinato
(d) Ethane-1, 2-diamine

Which of the following is a positive fractional number between -1 and 3?

if number of molecules of $H_2$ are double than that of $O_2$, then ratio of kinetic energy of hydrogen and that of oxygen at 300 K is

If ${10}^{-4}d{m}^3$ of water is introduced into a $1d{m}^3$ flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established. (Given vapour pressure of $H_{2}O$ at 300 K is 3170 Pa; R = 8.314 J/K/mol)