Chemistry Aptitude Quiz
Dear Readers,
IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies.
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..
Q1. Statement 1: Electrophile are electron rich in nature
Statement 2: H3O^+,BF_3 and AlCl_3 are electrophile and can accept electron pair
Statement 2: H3O^+,BF_3 and AlCl_3 are electrophile and can accept electron pair
Solution
(d)
Electrophiles are electron deficient while nucleophiles are electron rich in nature, ie, electrophile can accept an electron pair while nucleophile donates an electron pair
(d)
Electrophiles are electron deficient while nucleophiles are electron rich in nature, ie, electrophile can accept an electron pair while nucleophile donates an electron pair
Q2. Statement 1: The empirical formula of glucose is CH_2 O which represents the relative number of atoms of each atom present in this molecule
Statement 2: In glucose, the elements C, H, O have combined in the ratio 1:2:1
Statement 2: In glucose, the elements C, H, O have combined in the ratio 1:2:1
Solution
(a)
The empirical formula of compound in the simplest formula deduced from its percentage composition showing its composition by mass
(a)
The empirical formula of compound in the simplest formula deduced from its percentage composition showing its composition by mass
Q3. 
Solution
Q4. S Statement 1: Equivalent of K2 Cr2O7 has 1 equivalent of K and Cr and O each.
Statement 2: A species contains same number of equivalents of its components.
Statement 2: A species contains same number of equivalents of its components.
Solution
Part A
Part A
Q5. Statement 1: The IUPAC name of isoprene is 2-methyl buta-1,3-diene
Statement 2: Isoprene unit is a monomer of natural rubber
Statement 2: Isoprene unit is a monomer of natural rubber
Solution
Q6.
Statement 1: p-methyl benzyl carbocation (I) is more stable than benzyl carbocation (II)
Statement 2: Heterovalent or no bond resonance
Statement 2: Heterovalent or no bond resonance
Solution
(d)
(A) is false. They are not position isomers; since the position of the double bond has not changed, they are chain isomers.
(d)
(A) is false. They are not position isomers; since the position of the double bond has not changed, they are chain isomers.
Q7.Statement 1: Carbanion like ammonia have pyramidal shape
Statement 2: The carbon atom carrying negative charge has an octet of electrons
Statement 2: The carbon atom carrying negative charge has an octet of electrons
Solution
(b)
Carbon in carbanion is sp^3-hybridised with one orbital occupied by a lone pair
(b)
Carbon in carbanion is sp^3-hybridised with one orbital occupied by a lone pair
Q8. Statement 1: Hydroxylamine (NH_2 OH) contains N, and hence gives Prussian blue colour in Lassaigne's test
Statement 2: Hydroxylamine does not contain C, so with Na metal, CN^⊖ ion is not formed
Statement 2: Hydroxylamine does not contain C, so with Na metal, CN^⊖ ion is not formed
Solution
(d)
(A) is wrong. It does not give positive test for N, since it does not contain C. So CN^⊖ ion is not obtained which is anessential condition for the test for N. But (R) is correct
(d)
(A) is wrong. It does not give positive test for N, since it does not contain C. So CN^⊖ ion is not obtained which is anessential condition for the test for N. But (R) is correct
Q9. Statement 1: A solution which contains one gram equivalent of solute per litre of solutions is known as molar solution.
Statement 2: Normality=normality ×(mol.wt.of solute)/(eq.wt.of solute)
Statement 2: Normality=normality ×(mol.wt.of solute)/(eq.wt.of solute)
Solution
(d)
A solution; which contains one gram mole of solute per litre of solution is known as molar solution (M).
(d)
A solution; which contains one gram mole of solute per litre of solution is known as molar solution (M).
Q10. Statement 1: Methylene has a sextet of e ̅'s
Statement 2: Methylene behaves as a nucleophile
Statement 2: Methylene behaves as a nucleophile
Solution
(c)
Here, :CH2 has six e ̅'s and behaves as an electrophile
(c)
Here, :CH2 has six e ̅'s and behaves as an electrophile
Chemistry Aptitude Quiz
Dear Readers,
IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies.
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..
Q1. Statement 1: Electrophile are electron rich in nature
Statement 2: H3O^+,BF_3 and AlCl_3 are electrophile and can accept electron pair
Statement 2: H3O^+,BF_3 and AlCl_3 are electrophile and can accept electron pair
Solution
(d)
Electrophiles are electron deficient while nucleophiles are electron rich in nature, ie, electrophile can accept an electron pair while nucleophile donates an electron pair
(d)
Electrophiles are electron deficient while nucleophiles are electron rich in nature, ie, electrophile can accept an electron pair while nucleophile donates an electron pair
Q2. Statement 1: The empirical formula of glucose is CH_2 O which represents the relative number of atoms of each atom present in this molecule
Statement 2: In glucose, the elements C, H, O have combined in the ratio 1:2:1
Statement 2: In glucose, the elements C, H, O have combined in the ratio 1:2:1
Solution
(a)
The empirical formula of compound in the simplest formula deduced from its percentage composition showing its composition by mass
(a)
The empirical formula of compound in the simplest formula deduced from its percentage composition showing its composition by mass
Q3.
Solution
Q4. S Statement 1: Equivalent of K2 Cr2O7 has 1 equivalent of K and Cr and O each.
Statement 2: A species contains same number of equivalents of its components.
Statement 2: A species contains same number of equivalents of its components.
Solution
Part A
Part A
Q5. Statement 1: The IUPAC name of isoprene is 2-methyl buta-1,3-diene
Statement 2: Isoprene unit is a monomer of natural rubber
Statement 2: Isoprene unit is a monomer of natural rubber
Solution
Q6.
Statement 1: p-methyl benzyl carbocation (I) is more stable than benzyl carbocation (II)
Statement 2: Heterovalent or no bond resonance
Statement 2: Heterovalent or no bond resonance
Solution
(d)
(A) is false. They are not position isomers; since the position of the double bond has not changed, they are chain isomers.
(d)
(A) is false. They are not position isomers; since the position of the double bond has not changed, they are chain isomers.
Q7.Statement 1: Carbanion like ammonia have pyramidal shape
Statement 2: The carbon atom carrying negative charge has an octet of electrons
Statement 2: The carbon atom carrying negative charge has an octet of electrons
Solution
(b)
Carbon in carbanion is sp^3-hybridised with one orbital occupied by a lone pair
(b)
Carbon in carbanion is sp^3-hybridised with one orbital occupied by a lone pair
Q8. Statement 1: Hydroxylamine (NH_2 OH) contains N, and hence gives Prussian blue colour in Lassaigne's test
Statement 2: Hydroxylamine does not contain C, so with Na metal, CN^⊖ ion is not formed
Statement 2: Hydroxylamine does not contain C, so with Na metal, CN^⊖ ion is not formed
Solution
(d)
(A) is wrong. It does not give positive test for N, since it does not contain C. So CN^⊖ ion is not obtained which is anessential condition for the test for N. But (R) is correct
(d)
(A) is wrong. It does not give positive test for N, since it does not contain C. So CN^⊖ ion is not obtained which is anessential condition for the test for N. But (R) is correct
Q9. Statement 1: A solution which contains one gram equivalent of solute per litre of solutions is known as molar solution.
Statement 2: Normality=normality ×(mol.wt.of solute)/(eq.wt.of solute)
Statement 2: Normality=normality ×(mol.wt.of solute)/(eq.wt.of solute)
Solution
(d)
A solution; which contains one gram mole of solute per litre of solution is known as molar solution (M).
(d)
A solution; which contains one gram mole of solute per litre of solution is known as molar solution (M).
Q10. Statement 1: Methylene has a sextet of e ̅'s
Statement 2: Methylene behaves as a nucleophile
Statement 2: Methylene behaves as a nucleophile
Solution
(c)
Here, :CH2 has six e ̅'s and behaves as an electrophile
(c)
Here, :CH2 has six e ̅'s and behaves as an electrophile
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