Chemistry questions
29404 published questions with worked solutions.
- The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are :
- Match List-I with List-II : List-I: (a) Lassaigne's Test (b) Cu(II) oxide (c) Silver nitrate (d) The sodium fusion extract gives...
- The INCORRECT statements below regarding colloidal solutions is :Not in JEE Main or NEET syllabus
- Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high...
- The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M H_3PO_3 solution and 100 mL of 2 M H_3PO_2 solution,...
- Ga (atomic mass 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g of Ga is _______...Not in JEE Main or NEET syllabus
- A 5.0 m mol dm ^ -3 aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell constant 1.3 cm ^ -1 . The molar...
- A and B decompose via first order kinetics with half-lives 54.0 min and 18.0 min respectively. Starting from an equimolar non...
- For, n = 5, = (0, 1, 2, 3, 4). If = 4, m = –4, –3, –2, –1, 0, +1, +2, +3, +4 . 5d, 5f and 5g subshell contain one-one orbital...
- Given P_A^0 = 21kPa, P_B^0 = 18kPa. An Ideal solution is prepared by mixing 1 mol A and 2 mol B. The total vapour pressure of the...
- H_2SO_3 [Dibasic acid] c = 0.588 M. The pH of 0.588 M H_2SO_3 is ________. (Round off to the Nearest Integer)
- 3Pb(NO_3)_2+Cr_2(SO_4)_3 3PbSO_4+2Cr(NO_3)_3 . 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic...
- At 25°C, 50 g of iron reacts with HCl to form FeCl_2 . The evolved hydrogen gas expands against a constant pressure of 1 bar. The...
- [Ti(H_2O)_6]^ 3+ absorbs light of wavelength 498 nm during a d – d transition. The octahedral splitting energy for the above...
- Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : Size of Bk^...
- Which among the following pairs of Vitamins is stored in our body relatively for longer duration ?
- Given below are two statements : Statement I : Both CaCl_2.6H_2O and MgCl_2.8H_2O undergo dehydration on heating. Statement II :...Not in JEE Main or NEET syllabus
- Given below are two statements : Statement I : The E^0 value for Ce^ 4+ /Ce^ 3+ is + 1.74 V. Statement II : Ce is more stable in...
- Which of the following is Lindlar catalyst ?
- Given below are two statements : Statement I : H_2O_2 can act as both oxidising and reducing agent in basic medium. Statement II...