Question 1 :
Which of the following properties is not true regarding organic compounds ?
Question 4 :
The percentage of s-character of the hybrid orbital of C involved in the bond formation of $> C = C < $ is?
Question 6 :
In ${ PO }_{ 4 }^{ 3- }$ ion the formal charge on the oxygen atom of P-O bond is:
Question 8 :
Which of the following atom can not make a compound with $Na$?
Question 9 :
Which among the following elements has the tendency to form covalent compounds?
Question 11 :
The kinetic energy of one mole of hydrogen gas at $127^{o}C$ in $cal/mol$ is __________.
Question 12 :
At the same temperature and pressure, ratio of RMS velocities of $CH_{4}$ and $SO_{2}$ is:
Question 13 :
Which of the following order of root mean square speed of different gases at the same temperature is true?<br/>
Question 14 :
At what temperature would the rms speed of a gas molecule have twice its value at $100^{\circ}C$?
Question 15 :
Molecular velocities of two gases at the same temperature are $U_{1}$ and $U_{2}$ and their molecular masses are $m_{1}$ and $m_{2}$ respectively. Which of the following expression is correct?
Question 17 :
In a reaction, $4$ moles of electrons are transferred to $1$ mole of $HNO_3$ when acted as an oxidant. The possible reduction product is:
Question 18 :
The species reduce in the following reaction is :<br/>$Fe_2O_3+3CO \rightarrow2 Fe+3CO_2$
Question 19 : <span>The reaction given below is interpreted as:</span><div><br/><div>$H_2S(g)+ Cl_2(g)\rightarrow 2HCl(g) + S(s)$</div></div>
Question 20 : <p>Reaction of iron filings with powdered sulfur is a _____ process.<br/></p>
Question 22 :
Which of the following aqueous solutions would have a $pH$ greater than $7.0$?<br/>
Question 23 :
At $80^o$C, distilled water has $[H_3O^+]$ concentration equal to $1\times 10^{-6}$ mole/litre. The value of $K_w$ at this temperature will be:
Question 24 :
A solution was made up of $0.01M$ in chloroacetic acid $Cl{CH}_{2}COOH$ and also $0.002M$ in sodium chloracetate $Cl{CH}_{2}COONa$. What is $[{H}^{+}]$ in the solution? ${K}_{a}=1.5\times {10}^{-3}$.
Question 25 :
A strong acid is titrated with weak base. At equivalence point, pH will be
Question 26 :
$25.0 \,ml$ of $HCl$ solution gave, on reaction with excess $AgNO_3$ solution $2.125g$ of $AgCl$. The molarity of $HCl$ solution is:
Question 27 :
What will be the molarity of $30mL$ of $0.5M$ ${H}_{2}{SO}_{4}$ solution diluted to $500mL$?
Question 28 :
1.2 g of a substance $A$ is dissolved in $250\, cm^3$ of the solution to give a 0.1 molar solution. What is the molar mass of the compound $A$?
Question 29 :
A sulphuric acid solution contains $98\%$ $(m/v)H_{2}SO_{4}$. The density of the solutions is $1.98 \ gcm^{3}$. The molarity and molatity respectively of the solution are:
Question 33 :
In the periodic table, vertical columns of elements are called ..... and horizontal rows of elements are called .....
Question 34 :
The element placed with nickel in the table formed by Newlands was :
Question 35 :
Which of the following statement (s) about the Modern Periodic Table are incorrect? <br/>(i) The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number.<br/>(ii) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses. <br/>(iii) Isotopes are placed in adjoining group (s) in the Periodic Table. <br/><span>(iv) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number.</span>
Question 36 :
The amount of heat required to increase the temperature of 1 mol of a triatomatic gas (non-linear) at constant volume is n times the amount of heat required for 1 mol of monatomic gas. The value of n will be
Question 37 :
$m$ grams of a gas of molecular weight $M$ is flowing in an isolated tube with velocity $V$. If the gas flow is suddenly stopped the rise in its temperature is ($\gamma =$ratio of specific heats, $R$ <br> $=$ universal gas constant, $J$ $=$ mechanical equivalent of heat):<br/>
Question 38 :
The temperature of $5\ moles$ of a gas which was held at constant volume was changed from $100^oC$ to $120^oC$. The change in the internal energy of the gas was found to be $80\ J$. The total heat capacity of the gas at constant volume will be equal to
Question 39 :
For the process ${ H }_{ 2 }O(l)\rightarrow H_2O(1bar,\ 373K)$, the correct set of thermodynamic parameters is:
Question 40 :
Find the change in the internal energy when 15 gm of air is heated from $0^{o}C$ to $5^{o}C$. The specific heat of air at constant volume is 0.2 cal/gm$^{o}C$.<br/>
Question 41 :
Which of the following given element has one electron, one proton and no neutron?
Question 44 :
Hydrogen exists in atomic state in which of the following compounds?
Question 45 :
The atomic mass of deuterium isotope of hydrogen is $2$. The atomic mass of oxygen is $16$. Then what is  the molecular mass of heavy water ?
Question 46 :
If the radius of first orbit of $H-atom$ is $x \overset { o }{ A } ,$ then the radius of the second orbit of $Li^{2+}ion$ will be
Question 47 :
In a hydrogen atom, if energy of an electron in the ground state is 13.6 eV, then that in the 2nd excited state is:
Question 48 :
Consider the following statement<br/>I) Splitting of spectral lines in magnetic field is due to the presence of degenerate orbitals  <br/>II) In presence of electric field energy value of  $P_{x} ,P_{y}$ and  $P_{z}$ of same orbit are different<br/>III) Degenerate orbitals differs only in their orientation<br/><span>The correct combination is:</span>
Question 49 :
To which Bohr's orbit in hydrogen atoms, the electrons transition corresponds to the third line in Balmer series:
