Practice questions
88551 published questions with worked solutions.
- The maximum number of possible oxidation states of actinoides are shown by:
- In the following reaction: carbonyl compound + MeOH ⇌ acetal. Rate of the reaction is the highest for:
- Among the following species, the diamagnetic molecule is:
- The correct statements among I to III regarding group 13 element oxides are, (I) Boron trioxide is acidic. (II) Oxides of...
- A solution of Ni(NO_3)_2 is electrolysed between platinum electrodes using 0.1 Faraday electricity. How many mole of Ni will be...
- Molal depression constant for a solvent is 4.0 K kg mol^ -1 . The depression in the freezing point of the solvent for 0.03 mol...
- The correct statements among I to III are: (I) Valence bond theory cannot explain the color exhibited by transition metal...
- HF has highest boiling point among hydrogen halides, because it has:
- What would be the molality of 20% (mass/mass) aqueous solution of KI? (molar mass of KI = 166 g mol^ -1 )
- The peptide that gives positive ceric ammonium nitrate and carbylamine tests is:
- 10 mL of 1 mM surfactant solution forms a monolayer covering 0.24 cm^2 on a polar substrate. If the polar head is approximated as...Not in JEE Main or NEET syllabus
- Assertion: For the extraction of iron, haematite ore is used. Reason: Haematite is a carbonate ore of iron.Not in JEE Main or NEET syllabus
- At a given temperature T, gases Ne, Ar, Xe and Kr are found to deviate from ideal gas behaviour. Their equation of state is given...
- The amorphous form of silica is:
- Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect? (The Bohr radius is...
- If the system of equations 2x + 3y - z = 0, x + ky - 2z = 0 and 2x - y + z = 0 has a non-trivial solution (x, y, z), then x y + y...
- The common tangent to the circles x^2 + y^2 = 4 and x^2 + y^2 + 6x + 8y - 24 = 0 also passes through the point:
- If e^ x ( x x ,f(x) + ( x x + ^2x) )dx = e^ x f(x) + C, then a possible choice of f(x) is:
- If the tangent to the parabola y^2 = x at a point (α, β), (β > 0) is also a tangent to the ellipse, x^2 + 2y^2 = 1, then α is...
- The total number of matrices A = pmatrix 0 & 2y & 1 2x & y & -1 2x & -y & 1 pmatrix , (x, y ∈ R, x ≠ y) for which A^TA = 3I_3 is: