Q. The hybridization of $N,C$ and $O$ shown in the following compound respectively, are:

1. $s{p}^2,sp,s{p}^2$
2. $s{p}^2,s{p}^2,s{p}^2$
3. $s{p}^2,sp,sp$
4. $sp,sp,s{p}^2$

Q. The following compounds are:

1. geometrical isomers
2. positional isomers
3. optical isomers
4. functional group isomers

Q. The major product in the second step of the following reaction is:

Q. The IUPAC name of the given compound is:

1. 1-hydroxycyclohex-4-en-3-one
2. 1-hydroxycyclohex-3-en-5-one
3. 3-hydroxycyclohex-5-en-1-one
4. 5-hydroxycyclohex-2-en-1-one

Q. In water-gas shift reaction, hydrogen gas is produced from the reaction of steam with:

1. methane
2. coke
3. carbon monoxide
4. carbon dioxide

Q. Treatment with lime remove hardness of water caused by:

1. $CaC{l}_2$
2. $CaS{O}_4$
3. $Ca(HC{O}_3{)}_2$
4. $CaC{O}_3$

Q. The most polarizable ion among the following is:

1. $F^{-}$
2. $I^{-}$
3. $N{a}^{+}$
4. $C{l}^{-}$

Q. Among the following, the correct statement about cathode ray discharge tube is:

1. the electrical discharge can only be observed at high pressure and at low voltages
2. in the absence of external electrical or magnetic field, cathod rays travel in straight lines
3. the chatacteristics of cathode rays depend upon the material of electrodes
4. the chatacteristics of cathode rays depend upon the gas present in the cathod rays tube

Q. For a spontaneous process:

1. enthalpy change of the system must be negative
2. entropy change of the system must be positive
3. entropy change of the surrounding must be positive
4. entropy change of the system plus surrounding must be positive

Q. For one mole of a van der Waals gas, the compressibility factor $Z(=\frac{PV}{RT})$ at a fixed volume will certainly decrease if:
[Given: "a", "b" are standard parameters for van der Waals gas]

1. "b" increases and "a" decreases at constant temperature
2. "b" decreases and "a" increases at constant temperature
3. temperature increases at constant "a" and "b" values
4. "b" increases at constant "a" and tempeature