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. 1Compound A and B react to form C and D in a reaction that was found to be second-order over all and second-order in A. The rate constant…Chemistry· Chemical Kinetics· Moderate
2. 21 g of complex was passed through a cation exchanger to produce HCl. The acid liberated was diluted to 1 liter. What will be the molarity…Chemistry· Coordination Compounds· Tough· figure
3. 33 gram of activated charcoal was added to 50 mL of acetic acid solution (0.06N) in a flask. After an hour it was filtered and the strength…Chemistry· Surface Chemistry· Moderate
4. 4Find out the percentage of the reactant molecules crossing over the activation energy barrier at 325 K, given that DH325 = 0.12 kcal, Ea(b)…Chemistry· Chemical Kinetics· Tough
5. 5Finely divided catalyst has greater surface area and has greater catalytic activity than the compact solid. If a total surface area of…Chemistry· Surface Chemistry· Easy
6. 6A graph between log [IMAGE] and log a (abscissa) a being the initial concentration of A in the reaction. For reaction A→ Product, the rate…Chemistry· Chemical Kinetics· Moderate· figure
7. 7The correct IUPAC name for the compound [Co(NH3)4CI(ONO)]Cl isChemistry· Coordination Compounds· Moderate
8. 8Which of the following will exhibit maximum ionic conductivity?Chemistry· Coordination Compounds· Moderate· figure
9. 9A catalyst increases rate of reaction byChemistry· Surface Chemistry· Easy
10. 10Graph between concentration of the product and time of the reaction A→B is of the Hence graph between $- \frac{d\lbrack A\rbrack}{dt}$ and…Chemistry· Chemical Kinetics· Moderate· figure
11. 11Colloidal solution of gold prepared by different methods of different colors because ofChemistry· Surface Chemistry· Easy
12. 1220 ml of a gaseous hydrocarbon requires 100 ml of O_2 for complete combustion and produces 60 ml of CO_2 gas. Determine the molecular…Chemistry· Eudiometry· Tough· figure
13. 13Correct order of electronegativity of N, P, C and Si on Pauling scale isChemistry· Periodic table· Easy
14. 14The possible structure of monothiocarbonate ion isChemistry· Chemical Bonding· Moderate
15. 15The average charge on each O atom and average bond order of I-O bond in IO65- isChemistry· Chemical Bonding· Easy· figure
16. 16Among the species, which has the weakest carbon- oxygen bondChemistry· Chemical Bonding· Easy
17. 17Which of the following overlaps is z-axis to be the internuclear axis]? (a) $2p_{y} + 2p_{y} \rightarrow \pi 2p_{y}$ (b) $2p_{z} + 2p_{z}…Chemistry· Chemical Bonding· Moderate· figure
18. 18In the ionic equation $2K^{+}B{rO}_{3}^{-} + 12H^{+} + 10e^{-} \longrightarrow {Br}_{2} + 6H_{2}O + 2K^{+}$, the equivalent weight of KBrO3…Chemistry· Equivalent Concept· Moderate
19. 19How many millilitres of 0.1N H2SO4 solution will be required for complete reaction with a solution containing 0.125 g of pure Na2CO3Chemistry· Equivalent Concept· Easy
20. 20Which of the following solutions will exactly oxidize 25 mL of an acid solution of 0.1 M iron (II) oxalateChemistry· Equivalent Concept· Moderate
21. 21What can be the maximum percentage of available chlorine possible in a given bleaching powder sample (Take formula of bleaching powder as…Chemistry· Equivalent Concept· Moderate
22. 22What will the concentration of in a sample of 1 liter hard water if after treatment with washing soda 10 g insoluble CaCO3 is precipitated.Chemistry· Equivalent Concept· Moderate
23. 23The correct IUPAC name of following compound isChemistry· IUPAC and Structural Isomerism· Moderate· figure
24. 24The oxidation states of the most electronegative element in the products of the reaction of BaO_2with dilute H_2SO_4areChemistry· Redox Reaction· Easy