Practice questions
88551 published questions with worked solutions.
- 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...
- The value of the integral _ -2 ^ 2 ^2x [ x ] + 12 dx (where [x] denotes the greatest integer less than or equal to x) is:
- In a triangle, the sum of lengths of two sides is x and the product of the lengths of the same two sides is y. If x^2 - c^2 = y,...Not in JEE syllabus
- Let f(x) = cases -1, & -2 x < 0 x^2 - 1, & 0 x 2 cases and g(x) = |f(x)| + f(|x|). Then, in the interval (−2, 2), g is:
- The sum of an infinite geometric series with positive terms is 3 and the sum of the cubes of its terms is 27 19 . Then the common...
- The value of r for which ^ 20 C_r , ^ 20 C_0 + ^ 20 C_ r-1 , ^ 20 C_1 + ^ 20 C_ r-2 , ^ 20 C_2 + + ^ 20 C_0 , ^ 20 C_r is...
- Equation of a common tangent to the parabola y^2 = 4x and the hyperbola xy = 2 is: