Chemistry questions
29404 published questions with worked solutions.
- The correct option with order of melting points of the pairs (Mn, Fe), (Tc, Ru) and (Re, Os) is :
- 1.24 g of AX_2 (molar mass 124 g mol⁻¹) is dissolved in 1 kg of water to form a solution with boiling point of 100.0156°C, while...
- The reaction A_2 + B_2 2AB follows the mechanism A_2 k_ -1 k_1 A + A (fast) A + B_2 k_2 AB + B (slow) A + B AB (fast) The overall...
- An element 'E' has the ionisation enthalpy value of 374 kJ mol⁻¹. 'E' reacts with elements A, B, C and D with electron gain...
- Match List – I with List – II. List – I (Carbohydrate): (A) Amylose (B) Cellulose (C) Glycogen (D) Amylopectin List – II (Linkage...
- Given below are two statements : Statement (I) : The radii of isoelectronic species increases in the order. Mg^ 2+ < Na^+ < F^- <...
- The sum of sigma (σ) and pi(π) bonds in Hex-1,3-dien-5-yne is _______.
- If A_2B is 30% ionised in an aqueous solution, then the value of van't Hoff factor (i) is _____×10⁻¹.
- The calculated spin-only magnetic moments of K_3[Fe(OH)_6] and K_4[Fe(OH)_6] respectively are :
- Statement (I) : In partition chromatography, stationary phase is thin film of liquid present in the inert support. Statement (II)...
- Identify the essential amino acids from below : (A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine Choose the correct...
- Consider the equilibrium CO(g) + 3H_2(g) CH_4(g) + H_2O(g) If the pressure applied over the system increases by two fold at...
- Statement (I) : NaCl is added to the ice at 0°C, present in the ice cream box to prevent the melting of ice cream. Statement (II)...
- Statement (I) : On nitration of m-xylene with HNO_3, H_2SO_4 followed by oxidation, 4-nitrobenzene-1, 3-dicarboxylic acid is...
- Match List-I with List-II : List-I (Applications): (A) Transistors (B) Hearing aids (C) Invertors (D) Apollo space ship List-II...
- O_2 gas will be evolved as a product of electrolysis of : (A) an aqueous solution of AgNO_3 using silver electrodes. (B) an...
- Identify the homoleptic complexes with odd number of d electrons in the central metal. (A) [FeO_4]^ 2- (B) [Fe(CN)_6]^ 3- (C)...
- Total number of sigma ( ) _____ and pi( ) _____ bonds respectively present in hex-1-en-4-yne are :
- Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of...
- Drug X becomes ineffective after 50% decomposition. The original concentration of drug in a bottle was 16 mg/mL which becomes 4...