Practice questions
88551 published questions with worked solutions.
- Which of the following phenomena can not be explained by wave theory of light ?
- Earth has mass 8 times and radius 2 times that of a planet. If the escape velocity from the earth is 11.2 km/s, the escape...
- Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Knowing...
- A concave mirror produces an image of an object such that the distance between the object and image is 20 cm. If the...
- A uniform rod of mass 250 g having length 100 cm is balanced on a sharp edge at 40 cm mark. A mass of 400 g is suspended at 10 cm...
- A 400 g solid cube having an edge of length 10 cm floats in water. How much volume of the cube is outside the water ? (Given :...
- The magnetic field of an E.M. wave is given by B = ( 3 2 i + 1 2 j )30 [ (t- z c ) ] (S.I. Units) The corresponding electric...
- A balloon and its content having mass M is moving up with an acceleration 'a'. The mass that must be released from the content so...
- An electric dipole of dipole moment 6 10^ -6 Cm is placed in uniform electric field of magnitude 10^6 V/m. Initially, the dipole...
- The volume contraction of a solid copper cube of edge length 10 cm, when subjected to a hydraulic pressure of 7 10^6 Pa, would be...
- A thin transparent film with refractive index 1.4, is held on circular ring of radius 1.8 cm. The fluid in the film evaporates...
- Consider the elementary reaction A(g) + B(g) → C(g) + D(g). If the volume of reaction mixture is suddenly reduced to 1 3 of its...
- The amphoteric oxide among V_2O_3, V_2O_4 and V_2O_5 upon reaction with alkali leads to formation of an oxide anion. The...
- Match List-I with List-II List-I (Saccharides): (A) Sucrose (B) Maltose (C) Lactose (D) Amylopectin List-II (Glycosidic-linkages...
- Identify product [A], [B] and [C] in the following reaction sequence : CH_3-C CH Pd/c, H_2 A (i)O_3 (ii)Zn,H_2O [B]+[C]
- Arrange the following in increasing order of solubility product : Ca(OH)2, AgBr, PbS, HgS
- The purification method based on the following physical transformation is : Solid (X) Heat Vapour (X) Cool Solid (X)
- Identify correct conversion during acidic hydrolysis from the following : (A) starch gives galactose. (B) cane sugar gives equal...
- Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is...
- Match List-I with List-II List-I (Complex): (A) [CoF6]³⁻ (B) [NiCl4]²⁻ (C) [Co(NH3)6]³⁺ (D) [Ni(CN)4]²⁻ List-II (Hybridisation of...