Practice questions
88551 published questions with worked solutions.
- If an alpha particle with energy 7.7 MeV is bombarded on a thin gold foil, the closest distance from nucleus it can reach is...
- An aluminium and steel rods having same lengths and cross-sections are joined to make total length of 120 cm at 30°C. The...
- Two strings (A, B) having linear densities _A = 2 10^ -4 kg/m and _B = 4 10^ -4 kg/m and lengths L_A = 2.5 m and L_B = 1.5 m...
- Initially a satellite of 100 kg is in a circular orbit of radius 1.5R_E. This satellite can be moved to a circular orbit of...
- A point charge of 10^ -8 C is placed at origin. The work done in moving a point charge 2 C from point A(4,4,2) m to B(2,2,1) m is...
- 10 mole of oxygen is heated at constant volume from 30°C to 40°C. The change in the internal energy of the gas is _____ cal. (The...
- In a microscope the objective is having focal length f_0 = 2 cm and eye-piece is having focal length f_e = 4 cm. The tube length...
- Consider the following reactions. PbCl_2 + K_2CrO_4 (Hot solution) A + 2KCl A + NaOH B + Na_2CrO_4 PbSO_4 + 4CH_3COONH_4...
- Which of the following represents the correct trend for the mentioned property? A. F > P > S > B − First Ionization Energy B. Cl...
- A hydrocarbon 'P' (C_4H_8) on reaction with HCl gives an optically active compound 'Q' (C_4H_9Cl) which on reaction with one mole...
- Given below are two statements : Statement I: The number of pairs among [SiO_2, CO_2], [SnO, SnO_2], [PbO, PbO_2] and [GeO,...
- Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and PQ_2. When 1 g of PQ is dissolved in 50 g of...
- An organic compound (P) on treatment with aqueous ammonia under hot condition forms compound (Q) which on heating with Br_2 and...
- An organic compound "P" of molecular formula C_6H_ 12 O_3 gives positive Iodoform test but negative Tollen's test. When "P" is...
- MnO_4^ 2- , in acidic medium, disproportionates to :
- Given below are two statements: Statement I: The number of species among SF_4, NH_4^+, [NiCl_4], XeF_4, [PtCl_4]^ 2- , SeF_4 and...
- Given below are two statements: Statement I: Among [Cu(NH_3)_4]^ 2+ , [Ni(en)_3]^ 2+ , [Ni(NH_3)_6]^ 2+ and [Mn(H_2O)_6]^ 2+ ,...
- Identify correct statement from the following : A. Propanal and propanone are functional isomers. B. Ethoxyethane and...
- Identify the correct statements. A. Arginine and Tryptophan are essential amino acids. B. Histidine does not contain heterocyclic...
- Given below are two statements: Statement I: When an electric discharge is passed through gaseous hydrogen, the hydrogen...