CBSE Questions for Class 11 Medical Chemistry Organic Chemistry Some Basic Principles And Techniques Quiz 6 - MCQExams.com

Which functional group is present in a molecule of $${CH}_{3}OH$$?
  • Ketone
  • Aldehyde
  • Ester
  • Alcohol
  • Halide
Which of the following factors can increase the amount of $$E_1$$ product in the following reaction?
1131144_24e06eb8da6048df8edc9d43583163a8.png
  • Increasing polarity of solvent
  • Using a strong base
  • Rising reaction temperature
  • Using a Lewis acid catalyst
Carbon dioxide formed after reaction with cupric oxide is tested by :
  • caustic soda
  • quick lime
  • lime water
  • baking soda
In the detection test of carbon and hydrogen with cupric oxide, carbon is oxidized to :
  • carbon monoxide
  • carbon dioxide
  • carbonic acid
  • copper sulphate
In the detection test of carbon and hydrogen with cupric oxide, hydrogen is oxidized to __________.
  • water
  • methane
  • hydride
  • lime water
$$2H+CuO \rightarrow X+Y$$

The compound $$X$$ and $$Y$$ are: 
  • $$H_2O, Cu$$
  • $$H_2, CuO$$
  • both $$A$$ and $$B$$
  • none of the above

The IUPAC name of the given compound is :
577099_3287d1616e104d7cbb5e89373894ee7d.png
  • $$3$$-Phenyl-$$4$$-methylhexene
  • $$3$$-Phenyl-$$4$$-methylhexane
  • $$3$$-Phenyl-$$4$$-methylhex-$$2$$-ene
  • $$4$$-methyl-$$3$$-phenylhexene
IUPAC name of given compound is :
577162_c13ce01f92be4433ba7155e8ac866881.png
  • Cyclohexanol
  • Cyclohexanone
  • Cyclohexanal
  • None of these
The given diagram is an apparatus for carbon detection. Fill in the blank of the labelled diagram.
577743.JPG
  • Cupric oxide
  • Anhydrous copper sulphate
  • Copper precipitate
  • Calcium carbonate
Carbon and hydrogen are detected by heating the organic compound with ________.
  • magnesium oxide
  • cupric oxide
  • zinc oxide
  • sulphur dioxide
Water formed is tested by :
  • Copper nitrate test
  • Anhydrous copper sulphate test
  • Aqueous copper sulphate test
  • Copper
$$C+2CuO \rightarrow X+Y$$

The compound $$X$$ and $$Y$$ are :
  • $$CO_2, \ 2Cu$$
  • $$CO, \ Cu_2O$$
  • both $$A$$ and $$B$$
  • none of the above
Carbon present in the compounds is oxidised to carbon dioxide which:
  • turns blue litmus red
  • turns lime water milky
  • turns solution to green
  • has no effect on solution
Amongst the following elements present in an organic compound, the one which has no direct test for detection is :
  • $$Cl$$
  • $$N$$
  • $$S$$
  • $$O$$
In Lassaigne's test, the organic compound is fused with a piece of sodium metal  in order to:
  • increase the ionisation of the compound
  • decrease the melting point of the compound
  • increase the reactivity of the compound
  • convert the covalent compound into a mixture of ionic compounds
Water turns anhydrous copper sulphate solution in the carbon-hydrogen detection experiment :
  • brown
  • red
  • blue
  • green
Among the following, which one is a wrong statement?
  • $${ SeF }_{ 4 }$$ and $${ CH }_{ 4 }$$ have same shape.
  • $${ PH }_{ 5 }$$ and $${ BiCl }_{ 5 }$$ do not exist.
  • $$\rho \pi -d\pi $$ bonds are present in $${ SO }_{ 2 }$$.
  • $${ I }_{ 3 }^{ + }$$ has bent geometry.
Which of the following elements in an organic compound cannot be detected by Lassaigne's test?
  • Nitrogen
  • Sulphur
  • Chlorine
  • Hydrogen
The I.U.P.A.C. name of acetylene is :
  • Propane
  • Propyne
  • Ethene
  • Ethyne
The _________ present in the compound is oxidised to water which condenses on the cooler parts of the test-tube or in the bulb of delivery tube :
  • Hydrogen
  • Copper
  • Carbon soot
  • None of the above
Which one of the following processes will produce hard water ?
  • Saturation of water with $$CaCO_3$$
  • Saturation of water with $$MgCO_3$$
  • Saturation of water with $$MgSO_4$$
  • none of the above
The presence of carbon in an organic compound is detected by heating it with :
  • sodium metal to convert it to $$NaCN$$
  • $$CaO$$ to convert it into $$CO$$ which burns with a blue flame
  • $$CuO$$ to convert it into $$CO_2$$ which turns lime water milky
  • $$Cu$$ wire to give a bluish-green flame
Identify the functional group present in acetic acid:
  • $$O-\underset{O}{\underset{||}{C}}-OH$$
  • $$O-\overset{C}{\overset{||}{\underset{O}{\underset{||}{C}}}}-OH$$
  • $$-\underset{O}{\underset{||}{C}}-OH$$
  • $$H-\overset{H}{\overset{|}{\underset{H}{\underset{|}{C}}}}=OH$$
The atom or the group of atoms by which the characteristic reactions of organic compounds are determined, that atom or group of atoms is called ____________.
  • hydrocarbon
  • functional group
  • atom
  • compound
Identify the correct decreasing order of priority of the functional groups from the following:
  • $$-CONH_2, -C=O, -HC=O, -CN$$
  • $$-CONH_2, -CN, -HC=O, -C=O$$
  • $$-CN, -CONH_2, -C=O, -HC=O$$
  • $$-CN, -CONH_2, -HC=O, -C=O$$
An organic compound is a clear liquid having a molecular formula $${C}_{4}{H}_{8}O$$. It has an open-chain structure. Without any carbon-carbon double bond. The compound can be:

a) An alcohol
b) An ester
c) An aldehyde
d) A ketone
  • (a) and (b)
  • (c) and (d)
  • (b) and (d)
  • (d) and (a)
How many delocalised $$\pi$$- electrons are there in the following compound?
641198_20477ad98ef34431a78d6ea2a367af3c.png
  • 1
  • 2
  • 4
  • 6
The IUPAC name of compound $$CH_2 = CH -CH(CH_{3})_2$$ is:
  • 1, 1-dimethyl-2-propane
  • 2-vinyl propene
  • 3-methyl-1-butene
  • 2-vinyl propane
The functional group present in a molecule having the formula $${C}_{12}{O}_{9}$$ is
  • Carboxylic acid
  • Anhydride
  • Aldehyde
  • Alcohol

Among the given compounds 2, 3-dimethylhexane is:
632978_025d9bcc4a9d4d3db219eccbdd7d6444.png
  • i
  • ii
  • iii
  • iv
Which substance has the lowest boiling point?
  • $$CH_3 CH_2 CH_2 CH_2 OCH_3$$
  • $$CH_3 CH_2 OCH_2 CH_3$$
  • $$CH_3 CH_2 CH_2 CH_3$$
  • $$CH_3 CH_2 C = OCH_3$$
$$O=C=O$$
How many pi bonds does given compound have?
  • 2
  • 3
  • 4
  • 5
The IUPAC name for the hydrocarbon represented by:
668935_e87c4cfd76f14c85aa590e014ab0599b.png
  • 3, 3-diethylpentane
  • 2-ethylpentane
  • tetraethyl carbon
  • neo-nonane
Passing $${H}_{2}S$$ gas into a mixture of $${ Mn }^{ 2+ },{ Ni }^{ 2+ },{ Cu }^{ 2+ },{ Hg }^{ 2+ }$$ ions in acidified aqueous solution precipitates:
  • $$CuS$$ and $$HgS$$
  • $$MnS$$ and $$CuS$$
  • $$MnS$$ and $$NiS$$
  • $$NiS$$ and $$HgS$$
Which of the following is a 3-methylbutyl group?
  • $$ CH_3 CH_2 CH_2 CH_2- $$
  • $$ ( CH_3 CH_2 )_2 CH-$$
  • $$ (CH_3)_3 CCH_2- $$
  • $$ (CH_3)_2 CHCH_2CH_2-$$
The molecular formulae for phosgene and tear gas are .......... and ......... respectively. 
  • $$COCl_2$$ and $$CCl_3 NO_2$$
  • $$SOCl_2$$ and $$CCl_3 NO_2$$
  • $$COCl_2$$ and $$CCI_3NO_2$$
  • $$SOCl_2$$ and $$CCI_3 NO_2$$
Pi bond is formed between the two atoms when their is a:
  • donation of electron pair from one atom to another.
  • axial overlapping of atomic orbitals
  • transfer of one or more than one electron from one atom to another
  • lateral overlapping of atomic orbitals
Among the xylenes, which is thermodynamically most stable?
  • All are equally stable
How do we differentiate between $${ Fe }^{ 3+ }$$ and $${ Cr }^{ 3+ }$$ in group III?
  • By taking excess of $${ NH }_{ 4 }OH$$
  • By increasing $${ NH }_{ 4 }^{ + }$$ ion cocentration
  • By decreasing $${ OH }^{ - }$$ ion concentration
  • Both (b) and (c)
What is the IUPAC name of the following compound ?
641706_718961b847174875bbc62371ce7afd9e.png
  • 1, 2 - dimethyl cyclopropyl cyclohexane
  • 1, 2 - dimethyl spiro [2, 5] octane
  • 7, 8 - dimethyl spiro [5, 2] octane
  • 1, 2 - dimethyl bicyclo [5, 2] octane
In presence of $$HCl(aq.);{H}_{2}S$$ gas results the precipitation of group-2 cations but not of group-4 cations during qualitative analysis. It is due to:
  • Lower concentration of $${ S }^{ 2- }$$
  • Higher concentration of $${ S }^{ 2- }$$
  • Lower concentration of $${ H }^{ + } $$
  • Higher concentration of $${ H }^{ + }$$
How many $${1}^{o},{2}^{o}$$ and $${3}^{o}$$ $$H$$ atoms are present in toluene?
781284_903e7f2e1aca4c82ba456008dd4e6f10.png
  • $$3,0,5$$
  • $$3,5,0$$
  • $$4,3,0$$
  • $$3,6,0$$
$$HCHO$$ and $$HCOOH$$ are detected by
  • $$NaH{ CO }_{ 3 }$$
  • $$Cu{ SO }_{ 4 }/NaOH$$
  • $$Ag{ NO }_{ 3 }/{ NH }_{ 4 }OH$$
  • All of these
The IUPAC name of dimethyl ether is :
  • ethoxymethane
  • methoxymethane
  • methoxyethane
  • ethoxyethane
IUPAC name of above compound is:
770154_122103e9d79246a996d9ff445395c6ca.png
  • 5-ethenyleyclopenta-1,3-diene
  • 3-ethenylcyclopenta-1,4-diene
  • 1-ethenylcyclopenta-2,4-diene
  • 2-ethenylcyclopenta-1,3-diene
The IUPAC name of the following structure $$CH_3CH=C(CH_3)C\equiv CCH_3$$ is:
  • 3-methylhex-2-en-4-yne
  • 3-methylhex-2-yn-4-ene
  • 4-methylhex-4-yn-4-ene
  • all are correct
IUPAC name of the given is
695680_17df5476ae0d441389d5cf5c4b76d4b4.PNG
  • 3-hydroxymethylbenzoate
  • 4-hydroxy ethylbenzoate
  • 2-hydroxyethylbenzoate
  • 2-hydroxymethylbenzoate
$$CH_3-CH_2-\underset{CH_2}{\underset{||}{C}-}COOH$$
The correct IUPAC name of the above compound is:
  • $$2$$-methyl butanoic acid
  • $$2$$-Ethylprop-$$2$$-enoic acid
  • $$2$$-carboxy-$$1$$-butene
  • none of these
Which of the following is least stable?
  • $$CH_{3} - \overset {(+)}{CH} - CH_{3}$$
  • $$CH_{3}CH_{2} -\overset{(+)} CH_{2}$$
  • $$CH_{3} - \underset {\underset {CH_{3}}{|}}{\overset {(+)}{C}} - CH_{3}$$
  • $$(CH_{3})_{3}C - \underset {\underset {C_{6}H_{5}}{|}}{\overset {(+)}{C}}-H$$
Which of the following can have vacant $$p-$$orbital?
  • $${ _{ }^{ \bullet }{ CH } }_{ 3 }$$
  • $$\overset { \oplus }{ C } { H }_{ 3 }$$
  • $$\upharpoonleft \downharpoonright { CH }_{ 2 }$$
  • Both (b) and (c)
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