JEE Main questions
34495 published questions with worked solutions.
- If the boiling point of H_2O is 373 K, the boiling point of H_2S will be-
- Tyndall effect is observed when-Not in JEE Main or NEET syllabus
- The mechanism of S_N1 reaction is given as : R - X R^ X^ R^ ||X^ Y^ R - Y+X^ (Ion pair → Solvent separated ion pair) A student...
- The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products ? (a) nitrobenzene Sn/HCl (b)...
- Let C_ NaCl and C_ BaSO_4 be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO_4 , respectively,...
- In a molecule of pyrophosphoric acid, the number of P – OH, P = O and P – O – P bonds/moiety (ies) respectively are :
- The mole fraction of glucose ( C_6H_ 12 O_6 ) in an aqueous binary solution is 0.1. The mass percentage of water in it, to the...
- The volume strength of 8.9 M H_2O_2 solution calculated at 273 K and 1 atm is _______. (R = 0.0821 L atm K ^ -1 mol ^ -1 )...
- The total number of monohalogenated organic products in the following reaction (including stereoisomers) is _________ . A...
- The photoelectric current from Na (work function, w_0 = 2.3 eV) is stopped by the output voltage of the cell Pt(s) | H_2 (g, 1...
- An element with molar mass 2.7 10^ -2 kg mol ^ -1 forms cubic unit cell with edge length 405 pm. If its density is 2.7 10^3 kg m...Not in JEE Main or NEET syllabus
- The proposition p (p q) is equivalent toNot in JEE syllabus
- The area (in sq. units) of the region (x,y): 0 y x^2+1, 0 y x+1, 1 2 x 2 is
- If the number of integral terms in the expansion of (3^ 1/2 +5^ 1/8 )^n is exactly 33, then the least value of n is-
- 2 - ( ^ -1 4 5 + ^ -1 5 13 + ^ -1 16 65 ) is equal to-
- The lines r =( i - j )+l(2 i + k ) and r =(2 i - j )+m( i + j - k )
- _ - ^ | -|x| |dx is equal to-
- Consider the two sets : A= m R: both the roots of x^2-(m+1)x+m+4=0 are real and B=[-3,5). Which of the following is not true ?
- If and are the roots of the equation x^2+px+2=0 and 1 and 1 are the roots of the equation 2x^2+2qx+1=0, then ( - 1 ) ( - 1 ) ( +...
- Let P be a point on the parabola, y^2=12x and N be the foot of the perpendicular drawn from P on the axis of the parabola. A line...