Q. Explain the following :
(i) Available chlorine
(ii) Causes of inertness of noble gases.

Q. Bleaching of flowers by $C{l}_2$ is permanent while bleaching by $S{O}_2$ is temporary. Why?

Q. Match the following

Q. Who used the word 'catalyst' for the first time?

Q. Describe Brodie's ozonizer with diagram?

Q. Brass is:

1. liquid solution
2. gas solution
3. solid solution
4. All of these

Q. Ethyl alcohol and phenol both contain OH group. Why phenol is acidic and alcohol is neutral in nature? Give reason.

Q. Cleansing action of soap based on which principle?

Q. Starch is __________ saccharide.

Q. Silicon is a/an :

1. Good conductor
2. Bad conductor
3. Ore
4. Semiconductor

Q. Explain Siemens-Martin's open hearth process for the manufacture of steel with diagram.

Q. Write short notes on :
(i) Activation energy
(ii) Arrhenium equation.

Q. The substance which lowers the acidity of stomach is called ______________.

Q. Write the chemical reaction of chloroform with the following :
(i)Silver powder
(ii)Concentrate $HN{O}_3$
(iii)Acetone
(iv)Alkaline Solution of phenol

Q. The basic character of Amine is due to the presence of ________________ on Nitrogen atom.

Q. Xenon is a noble gas but it forms compounds, Why? Draw the structure of any two compounds:

Q. What are chelates? Giving one example and write the importance of chelate?

Q. Why does colloidal particle show Tyndall effect?

Q. The crystal lattice of NaCl is :

1. Face-centered Cubic lattice
2. Body-centered cubic lattice
3. Simple cubic lattice
4. Hexagonal close packing

Q. What is the main product of mustard oil reaction?

Q. A first order reaction is completed $90\%$ in 40 minutes. Calculate its half-life period. ($\log 10=1$).

Q. Which of the following is ferromagnetic?

1. Calcium metal
2. Iron metal
3. Sodium metal
4. Zinc metal

Q. What is Zeise's Salt and Ferrocene? Explain with structure?

Q. What is Lucas reagent? Distinguish primary secondary and tertiary alcohol using Lucas reagent.

Q. Why does aniline turn-blackish brown in open air?

Q. Give reasons: Haloarenes are less reactive than haloalkanes.

Q. What is Blue Vitriol? Write effect of heat on it.

Q. Catalysts which increase rate of a reaction are called ___________ catalyst.

Q. 'F' block elements ae known as _________ elements.

Q. Which kind of point defect is found in KCl crystal?

1. Frenkel
2. Schottky
3. Linear
4. Impurity