Chemistry questions
29404 published questions with worked solutions.
- The covalency and oxidation state of boron in [BF_4]^-, are :
- Identify the correct order of standard enthalpy of formation of sodium halides.
- What happens when methane undergoes combustion in systems A and B respectively? (System A: Adiabatic, System B: Diathermic...
- Which of the following complexes will exhibit maximum attraction to an applied magnetic field?
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The diameter...Not in JEE Main or NEET syllabus
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Isotopes of...Not in JEE Main or NEET syllabus
- Compound A from the following reaction sequence is : (A [0-5°C] Br_2,CS_2 B NaNO_2/HCl C [ ] H_3PO_2 dibromobenzene product)
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Order of...
- The correct group of halide ions which can be oxidised by oxygen in acidic medium is :
- Given below are two statements : Statement I : SO_2 and H_2O both possess V-shaped structure. Statement II : The bond angle of...
- Given below are two statements : Statement I : Tropolone is an aromatic compound and has 8 electrons. Statement II : electrons of...
- The naturally occurring amino acid that contains only one basic functional group in its chemical structure is :
- The total number of stereoisomers for the complex [Cr(ox)_2ClBr]^ 3- (where ox = oxalate) is :
- 1g of a carbonate (M_2CO_3) on treatment with excess HCl produces 0.01 mol of CO_2. The molar mass of M_2CO_3 is _______g mol^ -1...
- 20 mL of 0.1 M NaOH is added to 50 mL of 0.1 M acetic acid solution. The pH of the resulting solution is _______ 10^ -2 ....
- If the formula of Borax is Na_2B_4O_x(OH)_y.zH_2O, then x + y + z = _______
- At 298 K, the standard reduction potential for Cu^ 2+ /Cu electrode is 0.34 V. Given : K_ sp Cu(OH)_2 = 1 10^ -20 Take 2.303RT F...
- See the following chemical reaction: Cr_2O_7^ 2- +XH^++6Fe^ 2+ YCr^ 3+ +6Fe^ 3+ +ZH_2O The sum of X, Y and Z is
- The orbital angular momentum of an electron in 3s orbital is xh 2 . The value of x is _________(nearest integer)
- Sodium metal crystallizes in a body centred cubic lattice with unit cell edge length of 4 Å. The radius of sodium atom is...Not in JEE Main or NEET syllabus