Question 1 :
_________ is used to measure the pressure of liquids and gases.
Question 3 :
As a submarine descends into the deep ocean, the pressure it must withstand increase. At an altitude of $- 700$ meters, the pressure is $50$ atm (atmosphere), and at altitude of $- 900$ meters, the pressure is $70$ atm. For every $10$ meters the submarine descends, the pressure it faces increase by $n$, where $n$ is a constant. What is the value of $n$?
Question 4 :
Pressure of a gas mixture of air is measured by ____________.
Question 8 :
The weakest interparticle forces are found in which of the following?
Question 9 :
A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in the two phases have equal:
Question 10 : <div>Write 'true' or 'false' against the following statement.        <br/></div><div>In a physical change no net energy change is involved.<br/></div><div></div><br/>
Question 12 :
Solids which are formed by slow cooling will tend to be ________, while solids which are frozen rapidly are more likely to be _________ .
Question 13 : <div>Write 'true' or 'false' against the following statement.       <br/></div><div>Cutting of paper into pieces is a chemical change.</div><div></div>
Question 19 :
Pressure remaining constant, the volume of a fixed mass of a gas is directly proportional to its absolute temperature. This law is popularly known as :
Question 21 :
Which of the following gases is LEAST dense when all are measured under the same conditions?
Question 22 : <div>Choose the most appropriate answer:     </div><div>Rising and setting of the sun at a given place is a <br/></div>
Question 23 : <div>Write 'true' or 'false' against the following statement.         <br/></div><div>In a chemical change, rearrangement of molecules and atoms involves some energy changes.<br/></div><div></div><br/>
Question 26 : <div>Write 'true' or 'false' against the following statement.        <br/></div><div>New substances are formed in a chemical change.<br/></div><div></div><br/>
Question 29 : <div>Write 'true' or 'false' against the following statement.       <br/></div><div>During a physical change energy is neither given out or absorbed by the system.<br/></div><div></div><br/>
Question 30 : <div>Write 'true' or 'false' against the following statement.    </div><div>Earthquake is a desirable change.<br/></div>
Question 31 :
The fifth state of matter i.e. Bose-Einstein condensate was proved in:
Question 32 : <div>Write 'true' or 'false' against the following statement.    </div><div>Rusting of iron is a chemical change.<br/></div><br/>
Question 33 :
The boiling point of water, ethyl alcohol and diethyl ether are ${100}^{o}C, {78.5}^{o}C$ and ${34.6}^{o}C$ respectively. The intermolecular forces will be in the order of :
Question 36 :
How many grams of  aluminum will be completely oxidized by $2$ moles of oxygen at STP?
Question 37 :
The type of intermolecular force that is existing between the molecules of ${\text{BC}}{{\text{l}}_{\text{3}}}$ is
Question 39 :
$50$% of the reagent is used for dehydrohalogentaion of $6.45gm$ ${ CH }_{ 3 }{ CH }_{ 2 }Cl$. What will be the weight of the main product obtained?<br>(At. mass of $H,C$ and $Cl$ are $1,12$ and $35.5gm/{mole}^{-1}$ respectively)
Question 40 :
One litre of a gas is collected at STP. What would be the volume of the same gas at $2$ atmospheric pressure and $27^{\circ}C$:
Question 44 :
Under $STP$,  $22.4$ liters of $N_2(g)$ are made to combine completely with a sufficient quantity of $H_2(g)$. How much volume in litres of $NH_3(g)$ will be produced?<br/>
Question 46 :
When $CO_{2}(g)$ is passed over red-hot coke it partially gets reduced to $CO(g)$. Upon passing $0.5$ litre of $CO_{2}(g)$ over red-hot coke, the total volume of the gases increased to $700\ mL$. The composition of the gaseous mixture at STP is :
Question 47 :
What is the approximate mass of $1$ litre of nitrous oxide, $N_2O$, at $STP$ ? (Answer in grams)<br/>
Question 48 :
The halogen elements create diatomic, non-polar particles. Of the halogens, only iodine is a solid.What type of intermolecular forces are seen for this species?
Question 50 :
Assertion: On increasing the temperature, the fraction of molecules possessing most probable speed increases.
Reason: On increasing the temperature, the most probable speed of a gas increases.
Question 51 :
With the decrease in thermal energy of gas molecules, attraction and repulsion forces :
Question 52 :
What volume of decinormal ${ K }_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 }$ solution would be needed to convert 1.19 g of tin to stannic chloride in an acidic medium? (${ A }_{ Sn }\ =\<br/><br/>119$)
Question 53 :
Barium chloride dissolving in water at room temperature is explained by which of the following forces?
Question 55 :
Water and chlorobenzene are immiscible liquids. Their mixture boils at ${ 89 }^{ o }C$ under a reduced pressure of $7.7\times { 10 }^{ 4 }Pa$. The vapour pressure of pure water at ${ 89 }^{ o }C$ is $7\times { 10 }^{ 4 }Pa$. Weight percent of chlorobenzene in the distillate is:
Question 56 :
Select the correct alternative <br> The inter-molecular space is maximum in
Question 57 :
Write true or false for the following statements:<br>The Celsius scale is an absolute temperature scale.
Question 59 :
In which of the following chemical equation, the abbreviations represent the correct states of the reactants and products involved at reaction temperature?
Question 61 :
What happens when a crystal structure of NaCl type is pressurized?
Question 63 :
Arrange the following in the increasing order of 'forces of attraction':
Question 64 :
At what temperature, the volume of '$V'$ of a certain mass of gas at ${37}^{o}C$ be doubled? (keeping pressure constant)
Question 65 :
Which of the following will respond to sublimation?<br>1.Sodium chloride 2. Dry ice 3. Naphthalene 4. Ammonium chloride
Question 66 :
Assertion: Statement-1 : The ionic character exist in $H_2$ molecule but no dipole movement exists permanently.
Reason: Statement-2 : It arises so, as the two ionic forms having bond moments in opposite directions contribute equally to nullify the effect.
Question 67 :
Which one of the following represents the correct arrangement in the increasing order of forces of attraction between their particles?
Question 68 :
Which one of the following is not a unit of pressure?
Question 69 :
Which of the following conditions is most favourable for converting a gas into liquid?
Question 70 : The $pH$ of pure water at ${25}^{o}C$ and ${60}^{o}C$ are $7$ and $6.5$ respectively. $HCl$ gas is passed through water at ${25}^{o}C$ till the resulting $1$ litre solution aquires a $pH$ of $3$. Now $4\times {10}^{-3}$ mole of $NaCN$ are added into this solution. Also a fresh $0.1M$ $HCN$ solution has $pH$ $5.1936$. Now in the one part of solution obtained after addition of $NaCN$, one millimole of $NaOH$ are added and in the second part of this solution $0.5$ miili mole of $HCl$ are added.<div>The volume of $HCl$ passed through the solution at ${25}^{o}C$ and $1$ atm is :</div>
Question 71 : Assertion: A vacuum is a space from which almost all gas has been removed.
Reason: A vacuum is produced by pumping out all the air and other gases.<br/><div>Choose the correct option.</div>
Question 72 :
Assertion: Increase in surface area, increase in rate of evaportion
Reason: Stronger the intermolecular attractive forces, fast is the rate of evaporation at a given temperature
Question 74 :
Assertion: Volumes of non-reacting gases are always additive.
Reason: Gases do not have their own volume.
Question 75 :
At $100^oC$ and $1$ atm, if the density of the liquid water is $1.0\: g\:cm^{-3}$ and that of water vapour is $0.0006$ $g\: cm^{-3}$, then the volume occupied by water molecules in $1$ L of steam at this temperature is :
Question 77 :
Which one of the following statements is not correct about the three states of matter i.e. solid, liquid and gaseous?<br/>
Question 78 :
Boiling point of hydrogen fluoride is highest amongst $HF,\ HCl,\ HBr$ and $HI$. Which type of intermolecular forces are present in hydrogen fluoride?
Question 80 :
Write whether the following statement is true or false.<br>Solids have the larger Inter-molecular space.<br><br>
Question 82 :
Densities of two gases are in the ratio $1 : 2$ and their temperature are in the ratio $2 : 1$, then the ratio of their respective pressure is :
Question 85 :
A gaseous mixture of ethene, ethane and methane having total volume $150\ ml$ is subjected to combustion in excess of oxygen. If percentage of methane in the original mixture is $20\%$ then calculate volume (in ml) of $C{ O }_{ 2 }\left( g \right)$ which will be obtained at same temperature and pressure.
Question 86 : <p>Consider a classroom that is roughly $5m \times  10m \times  3m.$ Initially $T = 27^{\circ}C$ and $P = 1 atm$. There are $50$ people in an insulated class losing energy to the room at the average rate of $150 watt$ per person. How long can they remain in class if the body temperature is ${42^o}C$ and the person feels uncomfortable above this temperature?</p><p>[Molar heat capacity  of air = $(7/2)R$]<br/></p>
Question 87 :
$0.40\ g$ of helium in a bulb at a temperature of $T\ K$ had a pressure of $p$ atm. When the bulb was immersed in water bath at temperature $50\ K$ more than the first one, $0.08\ g$ of gas had to be removed to restore the original pressure. The temperature $T$ is:
Question 88 :
When $2$ g of gas A is introduced into an evacuated flask kept at $25^oC$, the pressure was found to be $1$ atmosphere. If $3$ g of another gas B is then added to the same flask, the pressure becomes $1.5$ atm. Assuming ideal behaviour, the ratio of molecular weights $(M_B:M_A)$ is :
Question 89 :
Two liters Duma's bulb contains nitrogen gas at $0.5 atm.$ On adding $0.01\ mol$ of $O_2$ gas it is necessary to cool bulb to a temperature $10^oC$ to maintain the same pressure. The temperature( in Celsius) of Duma's bulb is:
Question 90 :
In the equation of state of an ideal gas $PV = nRT$, the value of universal gas constant would depend only on:
Question 91 :
Consider a vessel filled with carbodioxide at $27^{\circ}C$ and $5$ atmospheric pressure. A part of the gas is removed at $27^{\circ}C$ and it fills a $3L$ container at $1\ atm$ and the pressure drops to $3.5\ atm$ in the vessel. The volume of the vessel is:
Question 92 :
When a drop of liquid splits up into a number of drops.
Question 93 :
The force which exists between particle of same kind of substance called cohesion force.
Question 94 :
The relative strength of interionic/ intermolecular forces in decreasing order is :
Question 95 :
At STP, a gas that contains $6.02\times 10^{23}$ atoms and it forms diatomic molecules will occupy :
Question 96 :
A vessel contains $1.6$ g of dioxygen at STP ($273.15$K, $1$ atm pressure). The gas is now transferred to another vessel at constant temperature, where pressure becomes half of the original pressure. The volume of the new vessel is:
Question 97 :
When $2$ g of gas A is introduced into an evacuated flask kept at $25^oC$, the pressure was found to be $1$ atm. If $3$ g of another gas B is then added to the same flask containing A, the pressure becomes $1.5$ atm. Assuming ideal behaviour, the ratio of molecular weights $(M_A:M_B)$ is :
Question 98 :
The volume of $HCl$ passed through the solution at ${25}^{o}C$ and $1$ atm is:
Question 99 :
The gaseous reaction $A_{(g)} \rightarrow 2B_{(g)} + C_{(g)}$ is found to be first order with respect to $A$. If the reaction is started with $p_{A} = 90\ mmHg$, the pressure after $10$ minutes found to be $180\ mmHg$. The rate constant of the reaction is?
Question 100 :
At STP, determine the amount of oxygen in liters that can be prepared from the decomposition of $212$ grams of sodium chlorate($1$ mol$=106$g).
Question 101 :
An open vessel containing air at 27$^o$C is heated to 127$^o$C. The fraction of air originally present in the bottle that is expelled is:
Question 102 :
Pressure of real gas is less than the pressure of ideal gas because:
Question 103 :
In a $13L$ vessel initially following reaction occur $C(s)+{S}_{2}(g)\rightleftharpoons {CS}_{2}(g)$ by $12g$ $C$, $64g$ ${S}_{2}$, $76g$ ${CS}_{2}$ at ${1027}^{o}C$ temperature then total pressure is:
Question 104 :
Which of the following order of molecular force of attraction among given species is incorrect ?
Question 105 :
$0.303$ g of the organic compound in Duma's method on combustion gave $32.27$ ml of moist nitrogen at $27^{\circ}$C and at P mm of Hg pressure. The vapour pressure at $ 27^{\circ}$C is $21$ mm of Hg. Find the value of P.
