Practice questions
88551 published questions with worked solutions.
- On heating, lead (II) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on...
- Match the following : List-I: (i) Foam (ii) Gel (iii) Aerosal (iv) Emulsion List-II: (a) smoke (b) cell fluid (c) jellies (d)...Not in JEE Main or NEET syllabus
- The pair in which both the species have the same magnetic moment (spin only) is-
- For one mole of an ideal gas, which of these statements must be true ? (a) U and H each depends only on temperature (b)...
- Among statements (a) – (d), the correct ones are- (a) Lime stone is decomposed to CaO during the extraction of iron from its...Not in JEE Main or NEET syllabus
- The ionic radii of O^ 2- , F^- , Na^+ and Mg^ 2+ are in the order
- At 300 K, the vapour pressure of a solution containing 1 mole of n-hexane and 3 moles of n-heptane is 550 mm of Hg. At the same...
- The mass of ammonia in grams produced when 2.8 kg of dinitrogen quantitatively reacts with 1 kg of dihydrogen is _______ .
- If 75% of a first order reaction was completed in 90 minutes, 60% of the same reaction would be completed in approximately (in...
- A 20.0 mL solution containing 0.2 g impure H_2O_2 reacts completely with 0.316 g of KMnO_4 in acid solution. The purity of H_2O_2...
- Given the following two statements : (S₁) : (q ∨ p) → (p ↔ q) is a fallacy. Then :Not in JEE syllabus
- If (a+ 2 b x)(a- 2 b y)=a^2-b^2 where a > b > 0, then dx dy at ( 4 , 4 ) is :
- The integral ( x x x+ x )^2dx is equal to (where C is a constant of integration) :
- A triangle ABC lying in the first quadrant has two vertices as A(1, 2) and B(3, 1). If ∠BAC = 90°, and ar(ΔABC) = 5 5 sq. units,...
- The value of _ r=0 ^ 20 ^ 50-r C_6 is equal to :
- Let P(3, 3) be a point on the hyperbola, x^2 a^2 - y^2 b^2 =1. if the normal to it at P intersects the x-axis at (9, 0) and e is...
- Let y = y(x) be the solution of the differential equation, xy'-y=x^2(x x+ x), x > 0. if y( ) = , then y'' ( 2 )+y ( 2 ) is equal...
- Let [t] denote the greatest integer ≤ t. Then the equation in x, [x]^2+2[x+2]-7=0 has :
- A survey shows that 63% of the people in a city read newspaper A whereas 76% read newspaper B. If x% fo the people read both the...
- Let f(x) = |x – 2| and g(x) = f(f(x)), x ∈ [0, 4]. Then _0^3(g(x)-f(x)) ,dx is equal to :