List of top Chemistry Questions asked in TS EAMCET

IUPAC names of benzene derivatives are respectively:

Increase in concentration of 'X' in blood of pregnant women who smoke may induce premature delivery. What is 'X'?

Correct statements regarding halides of group 14 elements:
I. Stability of dihalides: SiX$_2$ > GeX$_2$ > SnX$_2$ > PbX$_2$
II. SnF$_4$, PbF$_4$ are ionic
III. PbI$_4$ does not exist

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

Among alkaline earth metals, metal with least melting point is:

Identify correctly matched sets:
I. NaHCO$_3$ - fire extinguisher
II. Na$_2$CO$_3$ - water softening
III. NaOH - purification of bauxite

Which of the following is used as stabilizer for H$_2$O$_2$?

Given $K_p$ for $2AO_2 + O_2 \rightleftharpoons 2AO_3$ is $4 \times 10^{10}$. Find $K_p'$ for $3AO_3 \rightleftharpoons 3AO_2 + \frac{3}{2} O_2$.

Identify the correct statements:
I. Energy of an isolated system is constant
II. In a closed system, exchange of both energy and matter is possible
III. Enthalpy is extensive

At 27$^\circ$C, 100 mL of 0.05 M Cu$^{2+}$ solution is added to 1 L of 0.1 M KI. Find [KI] in resultant solution.

Isotherms ($p$-$V$ lines) of one mole of an ideal gas at $T_1$ and $T_2$ have slope ratio 1:2. If $T_1=1000$ K, find $T_2$.

Identify the pairs in which both molecules do not possess same type of hybridization:
I. H$_2$O, SO$_2$
II. PCl$_3$, NH$_3$
III. SO$_2$, SO$_3$
IV. BCl$_3$, NCl$_3$

Which of the following statements are correct?
I. The increasing order of covalent character of NaCl, RbCl, MgCl$_2$ is RbCl < NaCl <\ MgCl$_2$
II. The high boiling point of water is due to intramolecular hydrogen bonding
III. H$_2$O has more dipole moment among NH$_3$, H$_2$O, and HF

Ionization enthalpies of the elements X, Y, Z having successive atomic numbers respectively are 2080, 496, 737 kJ mol$^{-1}$. X, Y, Z are:

Among Li, Na, O, S, the elements having the most negative electron gain enthalpy and least negative electron gain enthalpy respectively are:

Observe the elements from H (Z=1) to Ca (Z=20). How many elements have no unpaired electrons in their ground state?

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):

The amine / salt of amine which gives positive test with a mixture of chloroform and alcoholic KOH solution is

The product 'C' in the given reaction sequence is

Identify the product 'P' in the given reaction sequence

Toluene \( \xrightarrow{(1) \text{CrO}_2\text{Cl}_2 / \text{CS}_2} \xrightarrow{(2) \text{H}_3\text{O}^+} \text{X} \xrightarrow[\text{Conc. NaOH}]{50\%} \text{Y} + \text{Z} \)
The correct statements about X, Y, and Z are
A. Y is a secondary alcohol
B. Y is the reduction product of X
C. Z on heating with soda lime gives benzene
D. Y does not give \( \text{H}_2 \) gas with Na metal

The major product in Reimer-Tiemann reaction is X. The reactants are Y and Z. X, Y and Z are respectively.

The number of chlorine (Cl) atoms in the structure of DDT molecule is

The incorrect statement about chloramphenicol is

A carbohydrate (A), when treated with dilute HCl in alcoholic solution gives two isomers (B) and (C). B on reaction with bromine water gives a monocarboxylic acid 'Z' and 'C' is a ketohexose. What is A?