In JEE Main 2018, Chemistry section consists of 30 questions. Chemistry section is far easier than Mathematics and Physics sections. Find solved practice paper of Chemistry based on the latest syllabus of JEE Main Entrance Examination 2018. It will help you to know the difficulty level of the questions which can be asked in JEE Main Examination 2018.
After analyzing the pattern of the previous year papers of JEE Main, our subject experts of Chemistry have designed this practice paper for JEE Main Examination 2018.
There are 30 questions in this practice paper of different difficulty level i.e., easy, moderate and tough. We have tried to cover every important topic of Physical Chemistry, Organic Chemistry and Inorganic Chemistry. All questions are of objective type having four options out of which only one is correct.
After attempting this paper, students must revise all the concepts and theory where they have done the wrong answers.
Few sample questions from the Practice Paper are given below:
Q. Which of the statements about solutions of electrolytes is not correct?
(a) Conductivity of solution depends upon size of ions
(b) Conductivity depends upon viscosity of solution
(c) Conductivity does not depend upon solvation of ions present in solution
(d) Conductivity of solution increases with temperature
Solution consists of electrolytes is known as electrolytic solution and conductivity of electrolytic solution depends upon the following factors
(i) Size of ions: As ion size increases, ion mobility decreases and conductivity decreases.
(ii) Viscosity of solution: Greater the viscosity of the solvent lesser will be the conductivity of the solution.
(iii) Solvation of ions: Greater the solvation of ions of an electrolyte lesser will be the electrical conductivity of the solution.
(iv) Temperature of medium: Conductivity of solution increases with increase in temperature.
Q. There are 14 elements in actinoid series. Which of the following elements does not belong to this series?
Tm (Z = 69) do not belong to actinoid series. The actinoid series is with atomic numbers 90 to 103. Thulium (Tm) has atomic number 69 belongs to lanthanoids (4 f series).
Q. The correct IUPAC name of [Pt(NH3)2Cl2] is
(a) Diamminedichloridoplatinum (II)
(b) Diamminedichloridoplatinum (IV)
(c) Diamminedichloridoplatinum (0)
The complex compound is [Pt(NH3)2Cl2]. The ligands present in the compound are
(i) NH3 -neutral ligand represented as amine.
(ii) Cl-anion ligand (ending with-o-) represented as chlorido di prefixed to represent two ligands.
The oxidation number of platinum in the compound is 2. Hence, correct IUPAC name of [Pt (NH3)2Cl2] is
Diammine dichloridoplatinum (II)
Q. Which of the following compounds will give butanone on oxidation with alkaline KMn04 solution?
(c) Both (a) and (b)
(d) None of these
Butan-2-ol on oxidation with alkaline KMn04 solution produces butanone as follows
Q. Which statement about aspirin is not true?
(a) Aspirin belongs to narcotic analgesics
(b) It is effective in relieving pain
(c) It has anti-blood clotting action
(d) It-s a neurologically active drug
Aspirin can be prepared as follows
Aspirin inhibits the synthesis of compounds known as prostaglandins which stimulate inflammation in the tissues and cause pain. So, it is effective in. relieving pain.
Beside this, aspirin has many other effects such as reducing fever (antipyretic) and preventing blood platelet coagulation. Because of this anti-blood clotting action, it is widely used to prevent heart attacks. It does not make a person addictive as it is non-narcotic drug.
Q. Read the following statements:
(i) KO2 is more stable than NaO2.
(ii) (NH4)2Cr2O7 shows self-redox reaction on heating.
(iii) Products in reaction of metal and nitric acid are independent of concentration.
Select the correct set of statements.
(b) (ii) and (iii)
(i) Na forms on reaction with O2 while K forms KO2. The increasing stability of superoxide, as the size of the metal cation increases is due to the stabilization of large anions by larger cations.
(ii) The heating of is a thermal decomposition reaction.
(iii) Different products are obtained in the reaction of metal and nitric acid by varying concentrations.