JEE Main Sample Paper Chemistry by NTA

Sample Questions for Section on Numerical Value-Chemistry Q.1: The hardness of a water sample (in terms of equivalents of CaCO 3) containing 10–3M CaSO4 is : (molar mass of CaSO4 = 136g/mol). Answer : 100 ppm Q.2: 50mL of 0.5M Oxalic Acid is needed to neutralize 25mL of sodium hydroxide solution. The amount of NaOH in 50mL of the given sodium hydroxide solution is ______________. . Answer : 2g Q.3: The standard electrode potential Eº and its temperature coefficient (dEº/dT)p for a cell are 2V and –5×10–4 VK–1 at 300K respectively. The cell reaction is Zn(s) + Cu2+(aq)→ Zn2+(aq) + Cu(s). The standard reaction enthalpy (ΔrHº) at 300K is _________________ kJ/mol (F= 96485 C mol-1) Answer : -414.9 Q.4: In the following reaction sequence, the mass percentage of carbon in the major product P is______________. - OH 2C6H5CHO + CH3COCH3 P Heat Answer : 87.18% Q.5: The number of monochlorinated product obtained on chlorination of 2 methylbutane is_________. Answer : 4