List of top Chemistry Questions asked in TS EAMCET

 A few sols are given below:
As2S3 sol, starch sol, Al2O3 ·
xH2O sol, TiO2 sol, gold sol, congo red sol, blood, methylene blue sol, CdS sol
The number of positively charged sols in the above list is:

Identify the correct graph for a first-order reaction (A → P) Given:
- \( x \)-axis = time (\( t \))
- \( a \) = Initial concentration of A
- \( (a-x) \) = Concentration of A at time \( t \)
At 300 K, aqueous KCl and aqueous K$_2$SO$_4$ solutions were electrolyzed separately using Pt electrodes. The gases liberated at cathodes in these two electrolytic processes are respectively:
Two statements are given below Statement I: Liquid A and liquid B form a non-ideal solution with positive deviation. \hspace{0.5cm} The interactions between A and B are weaker than A–A and B–B interactions. Statement II: For an ideal solution, \(\Delta_{\text{mix}} H = 2 \text{ kJ mol}^{-1} \); \(\Delta_{\text{mix}} V = 0\).
A crystal is formed by X (cations) and Y (anions). Atoms of Y form ccp and atoms of X occupy half of octahedral voids and half of tetrahedral voids. What is the molecular formula of the crystal?
Two statements are given below Statement I: The resonance structure with more number of covalent bonds is less stable. Statement II: The position of nuclei does not change in resonance structures.
From the following, identify the set that contains all meta directing groups:
IUPAC name of neohexyl alcohol is

Observe the following formula 

 The groups/atoms in the plane of the paper are

The minimum concentration (ppm) of dissolved oxygen in water that is required for the growth of fish is
Which of the following is used in liquid detergents?
Phenatole can be prepared from which of the following reactants?
The number of molecules with electrophilic centres in the following is CH\(_3\)CH\(_2\)Br, CH\(_3\)COCH\(_3\), CH\(_3\)CH\(_2\)CN, (CH\(_3\))\(_2\)Cd

Dry air contains 79\% \(\text{N}_2\) and 21\% \(\text{O}_2\). At temperature T(K), the Henry's law constants for \(\text{N}_2\) and \(\text{O}_2\) are \(8.57\times 10^4 \,\text{atm}\) and \(4.56\times 10^4 \,\text{atm}\), respectively. If this air is in contact with water at 1 atm, what is the ratio of the mole fractions \(\frac{X_{\text{N}_2}}{X_{\text{O}_2}}\) of \(\text{N}_2\) and \(\text{O}_2\) dissolved in water?

At 300 K, 0.06 kg of an organic solute is dissolved in 1 kg of water. The vapour pressure of the solution is 3.768 kPa. If the vapour pressure of pure water at that temperature is 3.78 kPa, what is the molar mass of the solute (in g mol\(^{-1}\))?
12 g of an element reacts with 32 g of oxygen. What is the equivalent weight of the element?
Observe the following two statements: I. For an isolated system, \( \Delta U = 0 \); \( q = 0 \) II. For a closed system, \( \Delta U = 0 \); \( q \neq 0 \) The correct answer is

Match the following:
 


The correct answer is:
 

An organic compound containing phosphorus on oxidation with \( Na_2O_2 \) gives a compound \( X \). When \( X \) is boiled with \( HNO_3 \) and treated with a reagent, it gives a yellow precipitate \( Y \). Identify \( X \) and \( Y \).
A halogen compound X (C\(_4\)H\(_9\)Br) on hydrolysis gave alcohol Y. The alcohol Y undergoes dehydration with 20\% H\(_3\)PO\(_4\) at 358 K. What is X?

In the following reaction sequence, what are X and Y respectively? 

 

The correct order of reducing power of alkali metals in aqueous solution is
The set containing the elements with positive electron gain enthalpies is?
Which of the following statements are not correct? i) \( \text{BeO has rock-salt structure} \)
ii) \( \text{BeSO}_4 \text{ is readily soluble in water} \)
iii) \( \text{The maximum coordination number of beryllium is four} \)
iv) \( \text{Be(OH)}_2 \text{ is basic in nature} \)
In which of the following ions the spin-only magnetic moment is lowest?