Question

SHORT ANSWER

Q1. What type of crystalline solid do the following substance form? i) Diamond ii) Ice iii) Cu iv) Boron nitrite

Q2. What do you understand by hcp and ccp?

Q3. Which type of crystals explains the following properties? a} Very hard b} Very soft c} High boiling point d) Electrical conductivity

Q4. A solid AB has NaCl type of lattice. If the radius of cation A* is 140 pm what will be the radius of anion B-?

Q5. KF has NaCl type of crystal. If the density of it is 2.48g/ cm3. What is the distance between K + and F-ion?

Q6. 10.3 grams of sodium bromide is dissolved in 50 ml of water. What is the molality of the solution?

Q7. What is Raoult's Law of lowering of vapour pressure? What are its limitations?

Q8. In a solution of ethanol in water, 54% is water, what are the mole fraction of ethanol and water in the solution?

Q9. What is the osmotic pressure of a 5% Urea solution at 27°C ?

Q10.7.5 g of a substance is dissolved in 75 g of water, the depression in freezing point is 1.2°C. What is molar mass of the substance? (Kf = 1.86 k molal - 1)

Q11. The freezing point of Urea in water is 0.400 ° C. What will be its boiling point? (Kf and Kb of water are 1.86 K Kg/mol and 0.52 K Kg/mol)

Q12.93% of H2S04 (by mass) has a density of 1.83 g/cm3. What is the molarity of the solution? ​

Answer 1

Answer:

KLJHGDSAG

Explanation:

Answer 2

Explanation:

to reduce or eliminate pathogenic agents (such as bacteria) on the surfaces of (something) : to make (something) sanitary (as by cleaning or disinfecting) You can use sponges and dishcloths safely if you take care to sanitize them, says Dean Cliver, a professor of food safety at the University of California, Davis.