Practice questions
88551 published questions with worked solutions.
- M grams of steam at 100° C is mixed with 200 g of ice at its melting point in a thermally insulated container. If it produces...
- Among the statements(a)-(d), the incorrect ones are : (a) Octahedral Co(III) complexes with strong field ligands have very high...
- Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non volatile solute are...
- A chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of...
- In the following reactions, products (A) and (B), respectively, are : NaOH + Cl_2 (A) + side products (hot and conc.) Ca(OH)_2 +...
- The ammonia ( NH_3 ) released on quantitative reaction of 0.6 g urea ( NH_2CONH_2 ) with sodium hydroxide (NaOH) can be...
- For the following reactions CH_3CH_2CH_2Br + Z^ k_s ( substitution ) CH_3CH_2CH_2Z + Br^ CH_3CH_2CH_2Br + Z^ k_e ( elimination )...
- The redox reaction among the following is :
- The bond order and the magnetic characteristics of CN^- are :
- Within each pair of element F & Cl, S & Se, and Li & Na, respectively, the elements that release more energy upon and electron...
- The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :Not in JEE Main or NEET syllabus
- The number of possible optical isomers for the complexes MA_2B_2 with sp^3 and dsp^2 hybridized metal atom, respectively, is :...
- The flocculation value of HCl for arsenic sulphide sol. is 30 m mol L ^ -1 . If H_2SO_4 is used for the flocculation of arsenic...Not in JEE Main or NEET syllabus
- 3 g of acetic acid is added to 250 mL of 0.1 M HCl and the solution made up to 500 mL. To 20 mL of this solution 1 2 mL of 5 M...
- The standard heat of formation ( _f H^0_ 298 ) of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite...
- The number of sp^2 hybridised carbons present in "Aspartame" is ____.
- The value of for which 4 _ -1 ^ 2 e^ - |x| dx=5, is:
- Let f(x) be a polynomial of degree 5 such that x= 1 are its critical points. If _ x 0 (2+ f(x) x^3 )=4, then which one of the...
- Let a , b and c be three unit vectors such that a + b + c = 0 . If = a b + b c + c a and d = a b + b c + c a , then the ordered...
- Let y = y(x) be a function of x satisfying y 1-x^2 =k-x 1-y^2 where k is a constant and y ( 1 2 )=- 1 4 . Then dy dx at x= 1 2 ,...