(Paper) Chemistry Objective Type Questions with Answers for the preparation of Engineering Entrance Test : AIEEE, IIT-JEE, CET
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Chemistry Objective Type Questions with Answers for the preparation of
Engineering Entrance Test : AIEEE, IIT-JEE, CET
(Important For 10+1 & 10+2 Science Students)
Test 2
(1) A reaction was found to be second order
with respect to the concentration of carbon monoxide. If the concentration of
carbon monoxide is doubled, with everything else kept the same, the rate of
reaction will
(a) remain unchanged
(b) triple
(c) increase by a factor of 4
(d) double
Answer (c) increase by a factor of 4
(2) HBr reacts with CH2 = CH – OCH3 under
anhydrous conditions at room temperature to give
(a) CH3CHO and CH3Br
(b) BrCH2CHO and CH3OH
(c) BrCH2 – CH2 – OCH3
(d) H3C – CHBr – OCH3
Answer (d) H3C – CHBr – OCH3
(3) The IUPAC name for the complex
[Co(NO2)(NH3)5]Cl2 is
(a) nitrito-N-pentaamminecobalt (III)
chloride
(b) nitrito-N-pentaamminecobalt (II)
chloride
(c) pentaammine nitrito-N-cobalt (II)
chloride
(d) pentaammine nitrito-N-cobalt (III)
chloride
Answer (d) pentaammine nitrito-N-cobalt
(III) chloride
(4) The term anomers of glucose refers to
(a) isomers of glucose that differ in
configurations at carbons one and four (C-1 and C-4)
(b) a mixture of (D)-glucose and
(L)-glucose
(c) enantiomers of glucose
(d) isomers of glucose that differ in
configuration at carbon one (C-1)
Answer (d) isomers of glucose that
differ in configuration at carbon one (C-1)
(5) Phenyl magnesium bromide reacts with methanol to give
(a) a mixture of anisole and Mg(OH)Br
(b) a mixture of benzene and Mg(OMe)Br
(c) a mixture of toluene and Mg(OH)Br
(d) a mixture of phenol and Mg(Me)Br
Answer (b) a mixture of benzene and
Mg(OMe)Br
(6) The pyrimidine bases present in DNA are
(a) cytosine and adenine
(b) cytosine and guanine
(c) cytosine and thymine
(d) cytosine and uracil
Answer (c) cytosine and thymine
(7) Among the following mixtures, dipole-dipole
as the major interaction, is present in
(a) benzene and ethanol
(b) acetonitrile and acetone
(c) KCl and water
(d) benzene and carbon tetrachloride
Answer (b) acetonitrile and acetone
(8) Fluorobenzene (C6H5F) can be synthesized in the laboratory
(a) by heating phenol with HF and KF
(b) from aniline by diazotisation
followed by heating the diazonium salt with HBF4
(c) by direct fluorination of benzene
with F2 gas
(d) by reacting bromobenzene with NaF
solution
Answer (b) from aniline by diazotisation
followed by heating the diazonium salt with HBF4
(9) A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the
following statements about these chlorides is correct?
(a) MCl2 is more volatile than MCl4
(b) MCl2 is more soluble in anhydrous
ethanol than MCl4
(c) MCl2 is more ionic than MCl4
(d) MCl2 is more easily hydrolysed than
MCl4
Answer (c) MCl2 is more ionic than MCl4
(10) Which of the following statements is true?
(a) H3PO3 is a stronger acid than H2SO3
(b) In aqueous medium HF is a stronger
acid than HCl
(c) HClO4 is a weaker acid than HClO3
(d) HNO3 is a stronger acid than HNO2
Answer (d) HNO3 is a stronger acid than
HNO2