Practice/Question bank/JEE Main

JEE Main practice questions

NTA-style Physics, Chemistry and Maths MCQs with solutions. 2,688 questions in the bank.

1. 1The acid D obtained through the following sequence of reactions isChemistry· Carbonyl Compound (Aldehyde and Ketone)· Tough· figure
2. 2What is in the following reaction ? MgCl2.6H2O + HCl + H2OChemistry· S-block· Easy· figure
3. 3Which of the following oxides is amphoteric in nature?Chemistry· P-block VA, VIA, VIIA elements· Easy
4. 4Among the triatomic molecules/ions, BeCl2, N3-, N2O, NO2+, O3, SCl2, ICl2-, I3- and XeF2, the total number of linear molecules(s)/ion(s)…Chemistry· Chemical Bonding· Moderate· figure
5. 5Chromium metal crystallizes with a body centered cubic lattice. The length of the unit cell is found to be 287 pm. Calculate the atomic…Chemistry· Easy
6. 6Metallic magnesium has a hexagonal close-packed structure and a density of 1.74 g/cm3. Assume magnesium atoms to be spheres of radius r.…Chemistry· Tough
7. 7In the scheme given below, the total number of intermolecular aldol condensation products formed from isChemistry· Carbonyl Compound (Aldehyde and Ketone)· Moderate· figure
8. 8The numberof aldol reaction (s) that occurs in the given transformation isChemistry· Carbonyl Compound (Aldehyde and Ketone)· Tough· figure
9. 9Which is correct about the cyclic silicateChemistry· Chemical Bonding· Moderate· figure
10. 102(Na2CO3. NaHCO3. Which of the following is not product of this reaction?Chemistry· S-block· Moderate· figure
11. 11The common features of the species N22-, O2 and NO- areChemistry· Chemical Bonding· Tough
12. 12Which of the following explode on heating?Chemistry· Amines· Moderate
13. 13Which of the following statement is false for trisilylamine?Chemistry· Chemical Bonding· Moderate· figure
14. 14Nitration of aniline in the strong acidic medium also gives m -nitroaniline because A In absence of substituents nitro group always goes to…Chemistry· Amines· Tough
15. 15Iron has body centerd cubic lattice structure. The edge length of the unit cell is found to be 286 pm. What is the radius of an iron atom?Chemistry· Easy
16. 16For a reaction, $X(g) \rightarrow Y(g) + Z(g)$ the half life period is 10 min. In What period of time would the concentration of X be…Chemistry· Physical Chemistry· Moderate
17. 17The major product obtained when $Br_{2}/Fe$ is treated withChemistry· Organic Chemistry· Tough· figure
18. 18Identify the product D in the following series of reaction ${CH}_{3}COOH\overset{LLiHA}{\longrightarrow}A\frac{H^{+}}{443K} \rightarrow…Chemistry· Organic Chemistry· Easy
19. 192-Methylbutane on reacting with bromine in the presence of sunlight gives mainlyChemistry· Organic Chemistry· Easy· figure
20. 20A gas decolourised by ${KMnO}_{4}$ solution but givesno precipitate with ammoniacal cuprous chloride isChemistry· Organic Chemistry· Moderate· figure
21. 21Which set of quantum numbers are not possible from the followingChemistry· Inorganic Chemistry· Easy
22. 22Which of the following does not represent the correct order of the property indicatedChemistry· Inorganic Chemistry· Tough
23. 23In which of the following arrangements the order is NOT according to the property indicated against itChemistry· Inorganic Chemistry· Moderate
24. 24The correct sequence of increasing covalent character is represented byChemistry· Inorganic Chemistry· Easy