Heavy Water

Q.

Which pair will show common ion effect?

1. ${\mathrm{BaCl}}_2+\mathrm{Ba}{\left({\mathrm{NO}}_3\right)}_2$

2. $\mathrm{NaCl}+\mathrm{HCl}$

3. ${\mathrm{NH}}_4\mathrm{OH}+{\mathrm{NH}}_4\mathrm{Cl}$

4. $\mathrm{AgCN}+\mathrm{KCN}$

Q.

If 30mL of $H_2$ and 20mL of $O_2$ react to form water 5mL of $H_2$ is left at the end of reaction, is it correct assertion.

Q. Identify the correct statements from the following:
(1) $C{O}_2\left(g\right)$ is used as refrigerant for ice-cream and frozen food.
(2) The structure of $C_{60}$ contains twelve six carbon rings and twenty five carbon rings.
(3) $\text{ZSM−5}$ a type of zeolite, is used to convert alcohols into gasoline.
(4) $CO$ is colorless and odourless gas.

1. (1), (2) and (3) only
2. (1) and (3) only
3. (2) and (3) only
4. (3) and (4) only

Q. Mass percentage of deuterium in heavy water is:

1. Same as that of protium in water
2. $11.1$
3. $20.0$
4. Cannot be predicted

Q.

What happens when the common salt is dissolved in the water?

Q.

Is Uranium more dangerous than Plutonium?

Q. Hardness of water is expressed in terms of parts per million of calcium carbonate. A sample of water contains $0.02\%$ of calcium carbonate, hardness of the sample is

1. 
2. 
3. 
4. 

Q.

The velocity of neutrons in a nuclear reactor is slowed down by using:

1. heavy water $D_{2}O$

2. ordinary water $H_{2}O$

3. fused caustic soda

4. Zinc rod

Q. ______ is prepared on a large scale from water gas.

1. Methanol
2. Ethanol
3. Methane
4. Ethane

Q.

Some statements about heavy water are given below.

$\left(\mathrm{a}\right)$Heavy water is more associated than ordinary water

$\left(\mathrm{b}\right)$Heavy water is used as moderators in nuclear reactors

$\left(\mathrm{c}\right)$ Heavy water is a more effective solvent than ordinary water.

Which of the above statements are correct?

Q. What is difference between molecularity and order of reaction?

Q.

Knowing the properties of $H_{2}O$ and $D_{2}O$, do you think that $D_{2}O$ can be used for drinking purposes?

Q. Deutero methane is obtained by the deuterolysis of :

1. $M{g}_3{N}_2$
2. $Ca{C}_2$
3. $A{l}_4{C}_3$
4. $C{a}_3{P}_2$
   

Q. The percentage of para – hydrogen in ordinary hydrogen Increases when

1. temperature is lowered
2. temperature is increased
3. pressure is increased and temperature decreased
4. None of these

Q. Which of the following is used as moderator in nuclear reactor?

1. Heavy water
2. Ozone
3. Hydrogen peroxide
4. Heavy hydrogen

Q. Identify the correct statements from the following:
(a) $C{O}_2$ is used as refrigerant for ice-cream and frozen food
(b) The structure of $C_{60}$ contains twelve six-membered rings and twenty five-membered rings.
(c) ZSM-5, a type of zeolite, it used to convert alcohol into gasoline.
(d) CO is colorless and odourless gas.

1. (b) and (c) only
2. (c) and (d) only
3. (a), (b), (c) and (d)
4. (a) and (c) only

Q. Which of the following statements is incorrect about amorphous solids?

1. They are rigid and incompressible
2. They are anisotropic
3. They melt over a wide range of temperature
4. There is no orderly arrangement of particles

Q. Which one of the following has the highest dipole moment? (i)CH3CI2 (ii) CHCl3 (iii) CCI4

Q. Heavy water is obtained by

1. Boiling water
2. Fractional distillation of water
3. Prolonged electrolysis of water
4. Heating

Q. The reagent used in the conversion of C2H5NH2 to C2H5Cl would be- (1) Sulphuryl chloride (2) Thionyl chloride (3) Nitrosyl chloride (4) All

Q. 14. Why Ch3OH has higher boiling point than Ch3SH

Q.

Is tungsten heavier than gold?

Q. Which of the following is an example of an acid salt :

1. 
2. 
3. 
4. 

Q. Metaphosphoric acid has the formula:

1. $H_{3}P{O}_4$
2. $HP{O}_3$
3. $H_{2}P{O}_3$
4. $H_{2}P{O}_2$

Q. A two-step mechanism has been suggested for the reaction of nitric oxide and bromine: $NO\left(g\right)+B{r}_2\left(g\right)\stackrel{k_1}{\to }NOB{r}_2\left(g\right)$
$NOB{r}_2\left(g\right)+NO\left(g\right)\stackrel{k_2}{\to }2NOBr\left(g\right)$
Observed rate law is, rate = $k\left[NO{]}^2\right[B{r}_2]$ : Hence, rate determining step is

1. $NO\left(g\right)+B{r}_2\left(g\right)\to NOB{r}_2\left(g\right)$
2. $NOB{r}_2\left(g\right)+NO\left(g\right)\to 2NOBr\left(g\right)$
3. $2NO\left(g\right)+B{r}_2\left(g\right)\to 2NOBr\left(g\right)$
4. $Noneofthese$

Q. ntP2O5 on treatment with exces s of H2O followed by excess of NH4OH forms (NH4)2HPO4. If hundred gram of (NH4)2HPO4 is formed then find out the mass of p 2 o5 initial takenn

Q. Dumas method is used for the estimation of:

1. Nitrogen
2. Sulphur
3. Phosphorus
4. Halogens

Q.

$D_{2}O$ is used more in

1. Insecticide preparation

2. Chemical industry

3. Nuclear reactor

4. Pharmaceutical preparations

Q.

Van der waal forces are maximum in?

1 HBr. 2. LiBr 3. LiCl 4. AgBr

Q. Find the enthalpy of formation of Hydrogen flouride on the basis of following data :
Bond energy of $H-H=434kJmo{l}^{-1}$
Bond energy of $F-F=158kJmo{l}^{-1}$
Bond energy of $H-F=565kJmo{l}^{-1}$

1. $300kJmo{l}^{-1}$
2. $250kJmo{l}^{-1}$
3. $269kJmo{l}^{-1}$
4. $275kJmo{l}^{-1}$