Chemistry questions
29404 published questions with worked solutions.
- A molecule with the formula AX₄Y has all its elements from p-block. Element A is rarest, monoatomic, non-radioactive from its...
- An optically active alkyl halide C₄H₉Br [A] reacts with hot KOH dissolved in ethanol and forms alkene [B] as major product which...
- If equal volumes of AB₂ and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a...
- On complete combustion 1.0g of an organic compound (X) gave 1.46 g of CO₂ and 0.567 g of H₂O. The empirical formula mass of...
- The property/properties that show irregularity in first four elements of group-17 is/are (A) Covalent radius (B) Electron...
- Choose the correct tests with respective observations. (A) CuSO₄ (acidified with acetic acid) + K₄[Fe(CN)₆] → Chocolate brown...
- According to Bohr's model of hydrogen atom, which of the following statement is incorrect?
- CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l) Consider the above reaction, what mass of CaCl₂ will be formed if 250 mL of...
- Consider the following equilibrium, CO(g) + 2H₂(g) CH₃OH(g) 0.1 mol of CO along with a catalyst is present in a 2 dm³ flask...
- Consider the following electrochemical cell at standard condition. Au(s)|QH₂,Q|NH₄X(0.01 M)||Ag⁺(1 M)|Ag(s) Ecell = + 0.4 V The...
- Given below are two statements: Statement I : Hyperconjugation is not a permanent effect. Statement II : In general, greater the...
- Identify the diamagnetic octahedral complex ions from below : A. [Mn(CN)_6]^ 3- B. [Co(NH_3)_6]^ 3+ C. [Fe(CN)_6]^ 4- D....
- Given below are two statements: Statement I: CrO_3 is a stronger oxidizing agent than MoO_3. Statement II: Cr(VI) is more stable...
- Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of...
- Compounds that should not be used as primary standards in titrimetric analysis are : A. Na_2Cr_2O_7 B. Oxalic acid C. NaOH D....
- Consider the following statements related to temperature dependence of rate constants. Identify the correct statements. A. The...
- In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at 300 K temperature...
- The standard cell potential (E_ cell ^ ) of a fuel cell based on the oxidation of methanol in air that has been used to power...
- The correct orders among the following are Atomic radius : B < Al < Ga < In < Tl Electronegativity : Al < Ga < In < Tl < B...
- The sequence from the following that would result in giving predominantly 3, 4, 5-Tribromoaniline is