Chemistry questions
29404 published questions with worked solutions.
- The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range 900...Not in JEE Main or NEET syllabus
- Among the following, the correct statement(s) about polymers is(are)Not in JEE Main or NEET syllabus
- Atom X occupies the fcc lattice sites as well as alternate tetrahedral voids of the same lattice. The packing efficiency (in %)...Not in JEE Main or NEET syllabus
- The correct statement(s) related to processes involved in the extraction of metals is(are)Not in JEE Main or NEET syllabus
- On decreasing the pH from 7 to 2, the solubility of a sparingly soluble salt (MX) of a weak acid (HX) increased from 10^ -4 mol...
- The stoichiometric reaction of 516 g of dimethyldichlorosilane with water results in a tetrameric cyclic product **X** in 75%...
- A gas has a compressibility factor of 0.5 and a molar volume of 0.4 dm^3 mol^ -1 at a temperature of 800 K and pressure **x**...
- Consider the following statements related to colloids. (I) Lyophobic colloids are **not** formed by simple mixing of dispersed...Not in JEE Main or NEET syllabus
- Among [ I _3]^+, [ SiO _4]^ 4- , SO _2 Cl _2, XeF _2, SF _4, ClF _3, Ni(CO) _4, XeO _2 F _2, [ PtCl _4]^ 2- , XeF _4, and SOCl...
- Consider the following molecules: Br _3 O _8, F _2 O , H _2 S _4 O _6, H _2 S _5 O _6, and C _3 O _2. Count the number of atoms...
- For He ^+, a transition takes place from the orbit of radius 105.8 pm to the orbit of radius 26.45 pm. The wavelength (in nm) of...
- 50 mL of 0.2 molal urea solution (density = 1.012 g mL^ -1 at 300 K) is mixed with 250 mL of a solution containing 0.06 g of...
- The reaction of 4-methyloct-1-ene (**P**, 2.52 g) with HBr in the presence of ( C _6 H _5 CO )_2 O _2 gives two isomeric bromides...
- At room temperature, disproportionation of an aqueous solution of *in situ* generated nitrous acid ( HNO _2) gives the species
- Among the following options, select the option in which each complex in **Set-I** shows geometrical isomerism and the two...
- Among the following, the correct statement(s) for electrons in an atom is(are)
- The option(s) in which at least three molecules follow Octet Rule is(are)
- Consider the following reaction, 2 H _2(g) + 2 NO (g) N _2(g) + 2 H _2 O (g) which follows the mechanism given below: 2 NO (g) k_...
- Complete reaction of acetaldehyde with excess formaldehyde, upon heating with conc. NaOH solution, gives **P** and **Q**....
- Among V(CO) _6, Cr(CO) _5, Cu(CO) _3, Mn(CO) _5, Fe(CO) _5, [ Co(CO) _3]^ 3- , [ Cr(CO) _4]^ 4- , and Ir(CO) _3, the total number...