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The element evolving two different gases on reaction with conc. Sulphuric acid is (a) P (b) C (c) Hg (d) S (e) sn The element evolving two different gases on reaction with conc. Sulphuric acid is (a) P (b) C (c) Hg (d) S (e) sn November 17, 2020 Category: Uncategorised (JEE Advanced Physics by [...]

Which of the following is a mixed oxide (a) Fe2O3 (b) PbO2 (c) Pb3O4 (d) BaO2 Which of the following is a mixed oxide (a) Fe2O3 (b) PbO2 (c) Pb3O4 (d) BaO2 November 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Solubility product constant ( Ksp )of salts of types MX1,MX2 and M3X at temperature -T are 4.0×10^−8,3.2×10^−14 and 2.7×10^−15, respectively. Solubilities (mol dm^−3 ) of the salts at temperature T” are in the order 3.2×10^−14 and 2.7×10^−15 MX2 and M3X at temperature -T are 4.0×10^−8 respectively. Solubilities (mol dm^−3 ) of the salts at temperature [...]

How many litres of water must be added to 1L of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2? > How many litres of water must be added to 1L of an aqueous solution of HCl with a pH of 1 to create an [...]

PbO2 is (a) Basic (b) Acidic (c) Neutral (d) amphoteric PbO2 is (a) Basic (b) Acidic (c) Neutral (d) amphoteric November 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

The products of the following reaction are SiO2 + C to (a) SiC and CO2 (b) SiO and CO (c) SiC and CO (d) Si and CO2 The products of the following reaction are SiO2 + C to (a) SiC and CO2 (b) SiO and CO (c) SiC and CO (d) Si and CO2 November [...]

pKa of a weak acid (HA) and pKb ​of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is : pKa of a weak acid (HA) and pKb ​of a weak base (BOH) are 3.2 and 3.4 respectively. The pH of their salt (AB) solution is : November [...]

On controlled hydrolysis and condensation, R3SiCl yields (a) R3Si-O-SiR3 On controlled hydrolysis and condensation R3SiCl yields (a) R3Si-O-SiR3 November 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

A convex lens form a real image of a point object placed on its principal axis. if the upper half of the lens is painted black, A convex lens form a real image of a point object placed on its principal axis. if the upper half of the lens is painted black November 17, 2020 [...]

A convex lens is made of 3 layers of glass of 3 different materials as in the figures. A point object is placed on its axis . The number of images of the object are A convex lens is made of 3 layers of glass of 3 different materials as in the figures. A point [...]