Chlorination

Q.

What are stereoisomers? Give an example.

Q. 24.Which of the following isomer having molecular formula C6H14 will give minimum number of monochloro derivatives? 1.Hexane 2. 2 methyl pentane 3. 3 methyl pentane 4. 2, 3 dimethylbutane

Q.
The number of monochlorinated products formed and the number of fractions, respectively are:

1. 6, 5
2. 6, 4
3. 5, 4
4. 6, 3

Q.

How does a substitution reaction differ from an addition reaction?

Q. Which of the following statement is correct in relation to the halogenation of alkane?

1. The reactivity of chlorine is less than bromine towards alkanes.
2. Free radical are pyramidal intermediate, stabilised by hyperconjugation and resonance.
3. Bromine has much higher regioselectivity than chlorine in abstracting $3^{\circ }$ hydrogen.
4. All of the above.

Q. 3-phenyl propene on reaction with HBr in presence of benzoyl peroxide gives (major product) explai

Q. In the free radical chlorination of methane, the chain initiating step involves the formation of -

1. Chlorine radical
2. Hydrogen chloride
3. Methyl radical
4. Chloromethyl radical

Q.

Which of the following is not formed by the reaction of Cl₂ on CH₄ in sunlight

1. CHCl₃

2. CH₂Cl₂

3. CH₃Cl

4. CH₃CH₂CH₃

Q.
What is the ratio of monochlorinated product(s) formed from the above reaction, if all the hydrogens were abstracted at equal rates?

1. $1:1$
2. $1:3$
3. $3:1$
4. $1:9$

Q. otal number of isomeric products (includingtereoisomers) obtained when 2-chlorobutane isheated with alcohölic KOH isTwo(1) Oneс.(4) FourThree

Q. Explain resonance in 2chloro but-1, 3-diene

Q.

1. (a)Ethylene bromide

2. (c)Ethyl bromide

3. (d)Ethylidene bromide

4. (b)Ethanol

Q. The compound with molecular formula C8H10which will give only two isomers on electrophilicsubstitution with Cl2/FeCl3 or with HNO3/H2SO4 is(a) p-dimethylbenzene (b) m-dimethylbenzene c) o-dimethylbenzene (d) ethylbenzene

Q. 0.5 L of gaseous hydrocarbon when burnt in excess of O_2 gave 3.5 L of CO_2 and 4L of water vapours under same conditions. Molecular formula of the hydrocarbon will be 1)C_4H_8 2)C_4H_{10} 3)C_7H_{16} 4)C_5H_1

Q.

The silver salt of a monobasic acid on ignition gave $60\%$ of Ag. The molecular weight of the acid is(aomic weight of Ag is 108)

1. 73

2. 77

3. 33

4. 37

Q. 30.A hydrocarbon contain 10.5g of carbon per gram of hydrogen.one litre vapour of hydrocarbon at 127C and 1atm pressure weight 2.8g.The molecular formula of hydrocarbon is

Q. Which of the following is not a possible termination step in the free radical chlorination of methane?

1. $\stackrel{\bullet }{C}{H}_3+C{l}_2\to C{H}_3-Cl+\stackrel{\bullet }{C}l$
2. $\stackrel{\bullet }{C}{H}_3+\stackrel{\bullet }{C}{H}_3\to C{H}_3-C{H}_3$
3. $\stackrel{\bullet }{C}{H}_3+\stackrel{\bullet }{C}l\to C{H}_3-Cl$
4. $\stackrel{\bullet }{C}l+\stackrel{\bullet }{C}l\to C{l}_2$

Q. hydrocarbon contain 91.3% carbon by mass. find the emprical formula of hydrocarbo

Q. Write formulae for the first five members of each homologous series beginning with the following compound, $H-CH=C{H}_2$.

Q. Between emission spectrum and absorption spectrum

Q. How many products (including stereo isomers) would you expect to obtain upon mono-chlorination of the indicated substrate under the conditions shown?

1. 2
2. 3
3. 4
4. 5

Q. The number of possible enantiomeric pairs that can be produced during monochlorination of 2-methylbutane is

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

Q.

The no. of Ring or cyclic Isomers for (pent - 1 - yne), excluding stereoisom is __

Q. 71. 100 ml of 0.5M H2SO4 is mixed with 50ml of 0.1N Ca(OH)2. The final solution is a) acidic 19/30N b) basic 19/30 N c) acidic 1/15 N d) basic 1/30 N

Q. Reactivity of hydrogen atoms attached to different carbon atoms in alkane has the order:

1. secondary > tertiary > primary
2. tertiary > primary > secondary
3. tertiary > secondary > primary
4. secondary = tertiary = primary

Q. Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is

1. n-hexane
2. 2, 3-dimethylbutane
3. 2, 2-dimethylbutane
4. 2-methylpentane

Q. Select the correct order of thermal stability of bicarbonates :

1. $NaHC{O}_3>KHC{O}_3>RbHC{O}_3>CsHC{O}_3$
2. $NaHC{O}_3<KHC{O}_3<RbHC{O}_3<CsHC{O}_3$
3. $RbHC{O}_3>CsHC{O}_3>NaHC{O}_3>KHC{O}_3$
4. $KHC{O}_3>RbHC{O}_3>CsHC{O}_3>NaHC{O}_3$

Q. 31. Why +R is not effective on meta hydroxy benzene

Q.

With dinitrogen, dihydrogen forms:

1. Ammonia

2. Ethanal

3. Silicon

4. Diamond

Q. how carbon hybridisation found for compounds