List of top Chemistry Questions asked in TS EAMCET

The molecular weight of a gas is 32. If 0.5 moles of the gas occupy 22.4 liters at standard temperature and pressure (STP), what is the density of the gas?

Match the following: 

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

 

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) \( \text{Be(OH)}_2 \text{ is basic in nature} \)
The minimum concentration (ppm) of dissolved oxygen in water that is required for the growth of fish is

Observe the following reactions (unbalanced): 

\( P_2O_3 + H_2O \rightarrow X \)

\( P_4O_{10} + H_2O \rightarrow Y \)

The number of \( P=O \) bonds present in \( X, Y \) are respectively:

12 g of an element reacts with 32 g of oxygen. What is the equivalent weight of the element?
The set of complex ions having the same number of unpaired electrons is
The correct order of reducing power of alkali metals in aqueous solution is
Match the following:
Siderite
The hybridisation of the central atom of \( BF_3 \), \( SnCl_2 \), \( HgCl_2 \), respectively is?
The set containing the elements with positive electron gain enthalpies is?
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?
Assertion (A): Aldehydes are more reactive than ketones towards nucleophilic addition reactions.
Reason (R): In aldehydes, the carbonyl carbon is less electrophilic compared to ketones.
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 \( Y \).
Identify the set of molecules which act as bleaching agents only by oxidation

The products of the following reactions \( X \) and \( Y \) respectively are Reaction: 

Which of the following is used in liquid detergents?
Identify the correct statements from the following:
Identify the pair of elements in which the number of s-electrons to p-electrons ratio is 2:3:
Phenatole can be prepared from which of the following reactants?
In which of the following ions the spin-only magnetic moment is lowest?

Match the following:
 


The correct answer is:
 

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\(^{-1}\))?

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?