Nucleophilic Substitution Reaction

Q.

The number of liters of air required to burn 8 litres of ethene is

Q. An excess of AgNO3 is added to 100mL of a 0.01M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be ?

Q.

A mixture of CaCl^2 and NaCl weighing 4.44g is treated with sodium carbonate solution to precipitate all the calcium ions as calcium carbonate . The calcium carbonate so obtainable is heated strongly to get 0.56g of CaO . The percentage of NaCl in mixture is

Q.

Calculate the amount of water(g) produced by the combustion of 16 gram of Methane.

Q. For the reaction, N2O5 gives 2NO2 + 1/2O2 Given - d[N2O5]/dt = K1[N2O5], d[NO2] /dt = K2[N2O5] d[O2] /dt =K3[N2O5] The relation between K1, K2 and K3 is

Q. In an experiment it is shown that 10 mL of 0.05 M solution of chloride required 10 mL of 0.1 M solution of $AgN{O}_3$, which of the following will be the formula of the chloride?
(X stands for the symbol of the element other than chlorine)

1. $X_{2}C{l}_2$
2. $XC{l}_2$
3. $XC{l}_4$
4. $X_{2}Cl$

Q. Heat of combustion of CH4, C2H4, C2H6 are -890, -1411, -1560 kJ/mol respectively. Which calorific fuel value in kJ/g?

Q.

The reaction:
$C{H}_{3}C{H}_{2}I+KO{H}_{aq}\to C{H}_{3}C{H}_{2}OH+KI$ is classified as :
(a) electrophilic substitution (b) nucleophilic substitution (c) elimination (d) addition

Q.

A sample containing only caco3 and Mgco3 is ignited to CaO and Mgo . The mixture of oxides produced weight exactly half as much as the original sample .

Calculate the percentage of caco3 and mgco3 in the sample

Q.

Following compounds are given

i) CH₃CH₂OH ii)CH₃COCH₃ iii) (CH₃)₂ CHOH iv) CH₃OH Which of the above compound/s on being warmed with iodine solution and NaOH will give iodoform?

1. I and ii

2. I, ii and iv

3. only ii

4. I, ii and iii

Q. Bacl2+k2so4=Baso4+2kcl why this reaction happens very fastly?

Q.

Find the purity percentage of ${\mathrm{H}}_2{\mathrm{SO}}_4$with density$1.8$, if $5\mathrm{ml}$ of ${\mathrm{H}}_2{\mathrm{SO}}_4$ is neutralized completely by $84.6\mathrm{ml}$of $2\mathrm{N}$ $\mathrm{NaOH}$ solution.

Q.

Which of the following fuels has the lowest calorific value?

1. ${\mathrm{C}}_2{\mathrm{H}}_6$

2. ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$

3. ${\mathrm{H}}_2$

4. ${\mathrm{C}}_2{\mathrm{H}}_4$

Q. The structural formula of cocaine is shown below. How many stereogenic carbon atoms are there in this molecule ?

1. $6$
2. $3$
3. $5$
4. $4$

Q.

An alkyl halide with molecular formula C₆H₁₃Br on dehydro halogenation gave two isomeric alkenes X and Y with molecular formula C₆H₁₂. On reductive Ozonolysis, X and Y gave four compounds CH₃COCH₃, CH₃CHO, CH₃CH₂CHO and (CH₃)₂ CHCHO. The alkyl halide is

1. 2, 2 - Dimethyl - 1 - bromobutane

2. 2 - Bromo - 2, 3 - dimethyl butane

3. 3 - Bromo - 2 - methyl pentane

4. 2 - Bromo hexane

Q. 38. One mole of gaseous aliphatic compound CxHyOz undergo complete combustion. Find the volume of O2, volume of CO2 evolved, volume of O2 required for complete combustion.

Q. The element having lowest first ionization potential among Sr, As, S and F and why ?

Q. Hg2Cl2 (s) + SnCl4 (aq) → 2HgCl2 (aq) +SnCl2(aq)
​​. Removal of
electropositive element

how is this a oxidation reaction ? And which element is oxidised ? Please explain this reaction step by step .

Q.

An alkene gives two moles of $HCHO$, one mole of $C{O}_2$ and one mole of on ozonolysis follows by hydrolysis. The structure of this alkene is:

1. 
2. 
3. 
4. 

Q. 10g of a sample of a mixture of CaCl2 and NaCl is treated to precipitate all the Ca as CaCO3. This CaCO3 is heated to convert all the Ca to CaO and the final mass of CaO is 1.62g. The percent by mass of CaCl2 in the original mixture is.

Q.

Find out the amount of oxygen required to burn 39g benzene completely.?

Q. The number of optically active products obtained from the complete ozonolysis of the compound is

1. 0
2. 1
3. 2
4. 4

Q. 32. Write the number of structural isomers of : (a) C3H7OH (b)C4H9OH

Q.

How do you test for organic compounds?

Q. Predict the starting material required to produce the product.

1. 
2. 
3. 
4. 

Q. Total number of structural isomers form on monochlorination of isopentane is:

Q. the possible structural isomers of c5h10 which do not decolourise bromine water

Q. Structural isomers possible for C4H8Br2 are: __________.

Q. find the no. of isomers for Pd[(NH3)2(ONO)2]

Q. Arrange the following compounds in the decreasing order of reactivity with $HBr$:

1. $a>b>c$
2. $b>a>c$
3. $b>c>a$
4. $a>c>b$