Practice questions
88551 published questions with worked solutions.
- A cup of water at 5^ (system) is placed in a microwave oven and the oven is turned on for one minute during which, the water...
- Given below are two statements : Statement I : [CoBr_4]^ 2- ion will absorb light of lower energy than [CoCl_4]^ 2- ion....
- Given, (A) n=5, m_l=-1 (B) n=3, l=2, m_l=-1, m_s=+ 1 2 The maximum number of electron(s) in an atom that can have the quantum...
- The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are : A. It is red in colour B. It has a high...
- Identify the molecule X with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among HNO_3, H_2SO_4,...
- Given below are two statements : Statement-I : Sublimation is used for the separation and purification of compounds with low...
- The correct statements from the following are : (A) Ionic radii of trivalent cations of group 13 elements decreases down the...
- Consider the general reaction given below at 400 K xA(g) yB(g) The values of K_p and K_c are studied under the same condition of...
- For the following gas phase equilibrium reaction at constant temperature, NH_3(g) 1 2 N_2(g)+ 3 2 H_2(g) If the total pressure is...
- x mg of pure HCl was used to make an aqueous solution. 25.0 mL of 0.1M , Ba(OH)_2 solution is used when the HCl solution was...
- Consider all the structural isomers with molecular formula C_5H_ 11 Br are separately treated with KOH (aq) to give respective...
- If f(x) = cases a|x| + x^2 - 2 |x|( |x|) x & , x 0 b & , x = 0 cases is continuous at x = 0, then a + b is equal to :
- Let 2 < < and = - 1 2 2 . Then the value of ( 150 2 )( 8 + 8 ) + ( 150 2 )( 8 - 8 ) is equal to :
- Let a = i - 2 j + 3 k , b = 2 i + j - k , c = i + j + k and v = a b . If v c = 11 and the length of the projection of b on c is...
- Consider two sets A= x z:||(x-3)-3| 1 and B= x R- 1,2 : (x-2)(x-4) x-1 _ e (|x-2|)=0 Then the number of onto functions f: A B is...
- The system of linear equations x+y+z=6 2x+5y+az=36 x+2y+3z=b has
- The sum of all the real solutions of the equation _ (x+3) (6x^2+28x+30) = 5-2 _ (6x+10) (x^2+6x+9) is equal to :
- Let a , b , c be three vectors such that a b = 2( a c ). If | a | = 1, | b | = 4, | c | = 2, and the angle between b and c is 60^...
- The least value of ( ^2 - 6 + 3 ^2 + 2) is
- Let I(x) = 3dx (4x+6)( 4x^2+8x+3 ) and I(0) = 3 4 +20. If I ( 1 2 ) = a 2 b +c, where a, b, c N , gcd(a,b)=1, then a+b+c is equal...