Chemistry questions
29404 published questions with worked solutions.
- Match List-I with List-II. List-I (Compound): (A) Carbon tetrachloride (B) Methylene chloride (C) DDT (D) Freons List-II (Use):...
- Solubility of calcium phosphate (molecular mass, M) in water is W g per 100 mL at 25°C. Its solubility product at 25°C will...
- The number of radial node/s for 3p orbital is:
- Consider the following redox reaction: MnO_4^- + H^+ + H_2C_2O_4 ⇌ Mn^ 2+ + H_2O + CO_2. The standard reduction potentials are...
- 10 mL of gaseous hydrocarbon of combustion gives 40 mL of CO_2(g) and 50 mL of water vapour. Total number of carbon and hydrogen...
- For a certain reaction at 300 K, K = 10, then ΔG° for the same reaction is –_____ × 10^ -1 kJ mol^ -1 . (Given R = 8.314 JK^ -1...
- The amount of electricity in Coulomb required for the oxidation of 1 mol of H_2O to O_2 is _____ × 10^5 C.
- Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2-methylbutane is _____.
- Mass of ethylene glycol (antifreeze) to be added to 18.6 kg of water to protect the freezing point at –24°C is ______ kg (Molar...
- The following data were obtained during the first order thermal decomposition of a gas A at constant volume: A(g) → 2B(g) + C(g)...
- Given below are two statements: one is labeled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): PH_3 has...
- Match List - I with List - II. List-I: (A) CH_3(CH_2)_5–C(=O)–OC_2H_5 → CH_3(CH_2)_5CHO (B) C_6H_5COC_6H_5 → C_6H_5CH_2C_6H_5 (C)...
- We have three aqueous solutions of NaCl labeled as 'A', 'B' and 'C' with concentration 0.1 M, 0.01 M and 0.001 M, respectively....
- Which of the following reactions are disproportionation reactions? (A) Cu^+ → Cu^ 2+ + Cu (B) 3MnO_4^ 2- + 4H^+ → 2MnO_4^- +...
- Given below are two statements: Statement (I): The NH_2 group in Aniline is ortho and para directing and a powerful activating...
- Given below are two statements: Statement (I): A solution of [Ni(H_2O)_6]^ 2+ is green in colour. Statement (II): A solution of...
- In case of isoelectronic species the size of F^-, Ne and Na^+ is affected by:
- Arrange the bonds in order of increasing ionic character in the molecules. LiF, K_2O, N_2, SO_2 and ClF_3.
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A):...
- In acidic medium, K_2Cr_2O_7 shows oxidising action as represented in the half reaction: Cr_2O_7^ 2- + XH^+ + Ye^ → 2A + ZH_2O....