Question Answers

A potentiometer wire AB is 100 cm long and has total resistance of 10Ω. If the galvanometer shows zero deflection at the position C, then find value of unknown resistance R. A potentiometer wire AB is 100 cm long and has total resistance of 10Ω. If the galvanometer shows zero deflection at the position C [...]

Ozone is used for purifying water because (a) It dissociates and release oxygen (b) Do not leave any foul smell like chlorine Ozone is used for purifying water because (a) It dissociates and release oxygen (b) Do not leave any foul smell like chlorine November 13, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

The angle of a prism is 6^0 and its refractive index for green light is 1.5. If a green ray passes through it, the deviation will be The angle of a prism is 6^0 and its refractive index for green light is 1.5. If a green ray passes through it the deviation will be : [...]

The boiling point of water is exceptinally high because (a) There is covalent bond between H and O (b) Water molecule is linear (c) Water molecules associate due to hydrogen bonding The boiling point of water is exceptinally high because (a) There is covalent bond between H and O (b) Water molecule is linear (c) [...]

Why do calcium ions make water hard but sodium ions do not (a) Calcium forms insoluble compounds with stearater ions present in soap Why do calcium ions make water hard but sodium ions do not (a) Calcium forms insoluble compounds with stearater ions present in soap November 13, 2020 Category: Uncategorised (JEE Advanced Physics by [...]

Which of the following is correct about heavy water (a) Water at 4 C having maximum density is known as heavy water (b) It is heavier than water (H20) Which of the following is correct about heavy water (a) Water at 4 C having maximum density is known as heavy water (b) It is heavier [...]

Temporary hardness may be removed from water by adding (a) CaCO3 (b) Ca(OH)2 (c) CaSO4 (d) HCl Temporary hardness may be removed from water by adding (a) CaCO3 (b) Ca(OH)2 (c) CaSO4 (d) HCl November 13, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

H20 is hard if it contains (a) NaHCO3 (b) MgSO4 (c) KCl (d) NaCl H20 is hard if it contains (a) NaHCO3 (b) MgSO4 (c) KCl (d) NaCl November 13, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Synthetic detergents are more effective in hard water than soaps because (a) They are highly soluble in water (b) Their Ca ++ and Mg ++ salts are water soluble Synthetic detergents are more effective in hard water than soaps because (a) They are highly soluble in water (b) Their Ca ++ and Mg ++ salts [...]

The alum used for purifying water is (a) Ferric alum (b) Chrome alum (c) Potash alum (d) Ammonium alum The alum used for purifying water is (a) Ferric alum (b) Chrome alum (c) Potash alum (d) Ammonium alum November 13, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,