List of top Chemistry Questions asked in TS EAMCET

IUPAC names of benzene derivatives are respectively:
An alcohol 'X' (C$_4$H$_{10}$O) reacts with conc. HCl at room temperature and gives chloride. 'X' on dehydration followed by ozonolysis gives 'Y' and 'Z'. Find 'Y' and 'Z'.
The pair of molecules having same number of lone pair of electrons on central atom is
The slope of isobar of one mole of an ideal gas at p (atm) is 0.082 L K$^{-1}$. What is the value of p in atm? (R=0.082 L atm mol$^{-1}$K$^{-1}$)
Elements A and B form two non-volatile compounds (AB$_2$ and AB$_4$). When 1 g of AB$_2$ is added to 20 g of C$_6$H$_6$ (molar mass =78 gmol$^{-1}$) the freezing point of C$_6$H$_6$ is lowered by 2.3 K. When 1 g of AB$_4$ is added to 20 g of C$_6$H$_6$, the freezing point of C$_6$H$_6$ was lowered by 1.3 K. The atomic masses of A and B are respectively (K$_f$(C$_6$H$_6$)=5.1 K kg mol$^{-1}$)
The reaction/s which represent the production of diborane on an industrial scale is/are:
I. 4BF$_3$ + 3LiAlH$_4$ → 2B$_2$H$_6$ + 3LiF + 3AlF$_3$
II. 2NaBH$_4$ + I$_2$ → B$_2$H$_6$ + 2NaI + H$_2$
III. 2BF$_3$ + 6NaH → B$_2$H$_6$ + 6NaF
X and Y in reaction sequence:
What are X, Y, Z respectively in the following reaction sequence?
CH$_3$CH=CHCH$_3$ $\xrightarrow{X}$ CH$_3$COOH $\xrightarrow{Y}$ CH$_3$CO-Cl $\xrightarrow{Z, C6H5NH2}$ C$_6$H$_5$NHCOCH$_3$
Identify the correct statements from the following
I. In Leclanché cell, Mn$^{2+}$ is oxidized to Mn$^{3+}$
II. Electrolysis of aqueous CuCl$_2$ solution using Pt electrodes liberate Cl$_2$ (g) at anode
III. Lead storage battery is a secondary battery
Consider the following statements
Statement-I: Oxides of sulphur and nitrogen are air pollutants
Statement-II: Photochemical smog is a reducing smog
The correct answer is
According to Bohr's theory of hydrogen atom, the approximate angular momentum of electron in H atom in the ground state is ($h = 6.62 \times 10^{-34}$ Js):
Among alkaline earth metals, metal with least melting point is:
An alcohol X (C$_4$H$_{10}$O) reacts with Conc.HCl/ZnCl$_2$ to give corresponding chloride. X on dehydration forms Y, which reacts with Baeyer's reagent to give Z. What is Z?
An isomer of C$_8$H$_{18}$ is X. This has five primary, one tertiary and one quaternary carbon. What is X?
At T(K) 10 L of an ideal gas was expanded to 12 L against a pressure of 2 atm irreversibly. What is the work done by the gas?
X and Y in reactions:
Identify the chain isomers from the following
Change in oxidation state of sulphur during oxidation of thiosulphate ion in neutral/alkaline solution by KMnO$_4$ is:
Identify the incorrect match
Which of the following compounds are correctly matched with their uses?
The catalyst used in the preparation of high density polythene is
The hormone 'X' increases glucose levels in blood. Low levels of other hormone 'Y' causes lethargyness. What are X, Y respectively?
X and Y in reactions:
The sequence of reagents required to convert benzoic acid to n-propyl benzene is
Observe the following set of reactions
2-Methylpropene $\xrightarrow{\text{HBr}, (\text{CH}_3\text{COO})_2}$ Y
2-Methylpropene $\xrightarrow{\text{HBr}}$ X
Correct statement regarding X and Y is