Chemistry questions
29404 published questions with worked solutions.
- The IUPAC name of the complex - [ Ag ( H _2 O )_2][ Ag ( CN )_2] is :
- The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is : [Given pK_a of CH_3COOH = 4.57]
- Match List - I with List - II. List-I (Products formed): (a) Cyanohydrin (b) Acetal (c) Schiff's base (d) Oxime List-II (Reaction...
- Given below are two statements : Statement I : The boiling points of aldehydes and ketones are higher than hydrocarbons of...
- Given below are two statements Statement I : The boiling points of the following hydrides of group 16 elements increases in the...
- In one molal solution that contains 0.5 mole of a solute, there is :
- Gadolinium has a low value of third ionisation enthalpy because of :
- Compound X on reaction with O_3 followed by Zn/H_2O gives formaldehyde and 2-methyl propanal as products. The compound X is :
- For a first order reaction A Products, initial concentration of A is 0.1 M, which becomes 0.001 M after 5 minutes. Rate constant...
- In the neutral or faintly alkaline medium, KMnO_4 oxidises iodide into iodate. The change in oxidation state of manganese in this...
- A 10.0 L flask contains 64 g of oxygen at 27ºC. (Assume O_2 gas is behaving ideally). The pressure inside the flask in bar is :...
- Given below are two statements: Statement I : In Lucas test, primary, secondary and tertiary alcohols are distinguished on the...
- 3 O _2(g) 2 O _3(g) for the above reaction at 298 K, K_c is found to be 3.0 10^ -59 . If the concentration of O_2 at equilibrium...
- Match List - I with List - II. List-I (Ores): (a) Haematite (b) Magnetite (c) Calamine (d) Kaolinite List-II (Composition): (i)...Not in JEE Main or NEET syllabus
- Copper crystallises in fcc unit cell with cell edge length of 3.608 10^ -8 cm. The density of copper is 8.92 g cm^ -3 . Calculate...Not in JEE Main or NEET syllabus
- Find the emf of the cell in which the following reaction takes place at 298 K Ni (s)+2 Ag ^ + (0.001 M ) Ni ^ 2+ (0.001 M )+2 Ag...
- The order of energy absorbed which is responsible for the color of complexes (A) [ Ni ( H _2 O )_2( en )_2]^ 2+ (B) [ Ni ( H _2 O...
- If radius of second Bohr orbit of the He^ + ion is 105.8 pm, what is the radius of third Bohr orbit of Li^ 2+ ion?
- Activation energy of any chemical reaction can be calculated if one knows the value of :
- Which one of the following alcohols reacts instantaneously with Lucas reagent?