Prepare for NEET Chemistry Some Basic Concepts in Chemistry with MCQs & PYQs on NEET.GUIDE. Get free practice, previous year questions, and expert solutions to strengthen your fundamentals.
NEET Questions / Chemistry / Some Basic Concepts in Chemistry
A mixture of two volatile liquids A and B shows a negative deviation from Raoult's law. Which of the following statements is INCORRECT regarding this mixture?
The enthalpy of mixing is negative.
The volume of mixing is negative.
The boiling point of the mixture is lower than that predicted by Raoult's law.
The intermolecular forces between A and B are stronger than the A-A and B-B interactions.
If two elements A and B combine in different ratios to form two compounds, and , then according to the Law of Multiple Proportions:
The ratio of masses of B which combine with a fixed mass of A is a simple whole number ratio.
The ratio of masses of A which combine with a fixed mass of B is a simple whole number ratio.
The ratio of masses of A which combine with a fixed mass of A is a simple whole number ratio.
The ratio of masses of B which combine with a fixed mass of B is a simple whole number ratio.
Iron filings are added to a solution of copper sulfate. Which observation indicates a metal displacement reaction has occurred?
Gas bubbles are produced.
The temperature of the solution decreases.
The blue solution fades and a reddish-brown solid deposits.
The solution becomes more intensely blue.
A student places a piece of metal X into a solution of . No reaction is observed. The student then places a piece of metal X into a solution of . A reaction occurs, and a reddish-brown solid forms. Where would metal X most likely be placed in the reactivity series?
Above Zn
Below Cu
Between Zn and Cu
Above both Zn and Cu
A closed vessel contains equal numbers of and molecules at same . Which of the following is not true?
The average kinetic energy of molecules is equal to the average kinetic energy of molecules.
The partial pressure of is equal to the partial pressure of .
The average speed of molecules is equal to the average speed of molecules.
The RMS speed of molecules is less than the RMS speed of molecules.
25 mL of 0.50 solution is added to 50 mL of 0.20 M in acidic solution. Which of the following statements is true?
0.010 mole of oxygen is liberated
0.005 mole of are left
0.030 g atom of oxygen gas is evolved
0.0025 mole does not react with
25 mL of 0.50 solution is added to 50 mL of 0.20 M in acidic solution. Which of the following statements is true?
0.010 mole of oxygen is liberated
0.005 mole of are left
0.030 g atom of oxygen gas is evolved
0.0025 mole does not react with
The equivalent weight of is half of its molecular weight when it is converted to :
In which case the number of molecules of water maximum
18 ml of water
0.18 g of water
0.00224 L of water vapour at 1 atm and 273 K
mol of water
