Chemistry questions
29404 published questions with worked solutions.
- Match List-I with List-II. List-I (Atomic number): A. 37 B. 78 C. 52 D. 65 List-II (Block of periodic table): I. p-block II....
- Which of the following is correct order of ligand field strength?
- Match List-I with List-II. List-I (Molecules/Ions): A. IF_7 B. ICl_4^- C. XeF_6 D. XeF_2 List-II (No. of lone pairs of e^- on...
- A solution containing 2 g of a non-volatile solute in 20 g of water boils at 373.52 K. The molecular mass of the solute is...
- A 300 mL bottle of soft drink has 0.2 M CO_2 dissolved in it. Assuming CO_2 behaves as an ideal gas, the volume of the dissolved...
- The energy of one mole of photons of radiation of frequency 2 10^ 12 Hz in J mol^ -1 is ________. (Nearest integer) [Given : h =...
- Some amount of dichloromethane (CH_2Cl_2) is added to 671.141 mL of chloroform (CHCl_3) to prepare 2.6 10^ -3 M solution of...
- If compound A reacts with B following first order kinetics with rate constant 2.011 10^ -3 s^ -1 . The time taken by A (in...
- The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is ________.
- 600 mL of 0.01 M HCl is mixed with 400 mL of 0.01 M H_2SO_4. The pH of the mixture is ________ 10^ -2 . (Nearest integer) Given...
- The normal rain water is slightly acidic and its pH value is 5.6 because of which one of the following ?
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason(R). Assertion (A) : The...
- Arrange the following orbitals in decreasing order of energy. A. n = 3, l = 0, m = 0 B. n = 4, l = 0, m = 0 C. n = 3, l = 1, m =...
- Evaluate the following statements for their correctness. A. The elevation in boiling point temperature of water will be same for...
- The Lewis acid character of boron tri halides follows the order
- A hydrocarbon 'X' with formula C_6H_8 uses two moles H_2 on catalytic hydrogenation of its one mole. On ozonolysis, 'X' yields...
- In the following halogenated organic compounds the one with maximum number of chlorine atoms in its structure is
- Which of the following elements have half-filled f-orbitals in their ground state ? (Given : atomic number Sm = 62; Eu = 63; Tb =...
- Which of the following compounds are not used as disinfectants ? (A) Chloroxylenol (B) Bithional (C) Veronal (D) Prontosil (E)...Not in JEE Main or NEET syllabus
- Incorrect statement for the use of indicators in acid-base titration is :