Chemistry questions
29404 published questions with worked solutions.
- Match the metals (Column I) with the coordination compound(s)/enzyme(s) (Column II): List-I: (A) Co (B) Zn (C) Rh (D) Mg List-II:...
- The chloride that CANNOT get hydrolysed is:
- The correct statements among (a) to (d) regarding H_2 as a fuel are: (a) It produces less pollutants than petrol. (b) A cylinder...Not in JEE Main or NEET syllabus
- Peroxyacetyl nitrate (PAN), an eye irritant is produced by:Not in JEE Main or NEET syllabus
- For the cell Zn(s)|Zn^ 2+ (aq)||M^ x+ (aq)|M(s), different half cells and their standard electrode potentials are given below: |...
- A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25 ml of CO_2 at T = 298.15 K and p = 1 bar....
- The correct order of the atomic radii of C, Cs, Al, and S is:
- Match the ores (column A) with the metals (column B): List-I: (I) Siderite (II) Kaolinite (III) Malachite (IV) Calamine List-II:...Not in JEE Main or NEET syllabus
- An example of solid sol is:Not in JEE Main or NEET syllabus
- NaH is an example of:Not in JEE Main or NEET syllabus
- A solid having density of 9 10^ 3 kg m^ -3 forms face centred cubic crystals of edge length 200 2 pm. What is the molar mass of...Not in JEE Main or NEET syllabus
- For the chemical reaction X ⇌ Y, the standard reaction Gibbs energy depends on temperature T (in K) as _rG° (in kJ mol^ -1 ) =...
- Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H-atom is suitable for...
- The freezing point of a diluted milk sample is found to be −0.2°C, while it should have been −0.5°C for pure milk. How much water...
- Two blocks of the same metal having same mass and at temperature T_1 and T_2, respectively, are brought in contact with each...
- A reaction of cobalt(III) chloride and ethylenediamine in a 1 : 2 mole ratio generates two isomeric products A (violet coloured)...
- The pair that contains two P–H bonds in each of the oxoacids is:
- In the reaction of oxalate with permanganate in acidic medium, the number of electrons involved in producing one molecule of CO_2...
- The reaction that is NOT involved in the ozone layer depletion mechanism in the stratosphere is:
- For an elementary chemical reaction, A_2 k_ -1 k_1 2A, the expression for d[A] dt is: