Comprehensive collection of questions from General Science asked in recent state service examinations. Each question is verified with official answer keys and step-by-step bilingual solutions.
Which colloidal system is represented by 'fog'?
If 100 grams of sugar is mixed with half a litre of water to prepare an unsaturated solution, which physical quantity will NOT change?
Examples of corrosion are-
In hydrolysis, energy is produced in the form of-
The process of converting solid camphor directly into camphor vapour is called-
Pasteurization is a process in which-
Why does water boil at a temperature below $100^\circ\text{C}$ at high altitudes?
Consider the following statements: 1. In the process of osmosis, the solvent moves from concentrated solution towards dilute solution. 2. In reverse osmosis, external pressure is applied on the dilute solution. Which of the statements given above is/are correct?
Assertion (A): Chemical reactions become faster at higher temperatures. Reason (R): Molecular motion becomes more rapid at higher temperatures. Code:
Which of the following processes is NOT useful for the purification of solid impurities?
Which of the following is/are example/examples of chemical change? 1. Crystallization of sodium chloride 2. Melting of ice 3. Souring/curdling of milk Select the correct answer using the code given below:
Which one of the following statements is NOT correct?
Pasteurization is related to-
Direct transition of a solid into gas is called -
Consider the following statements: Assertion (A): A mixture of salt and ice achieves a temperature below $0^\circ\text{C}$. Reason (R): Salt increases the freezing point of ice. Select the correct answer from the code given below:
An atom of an element has two protons, two neutrons and two electrons. What is the mass number of that element?
Which of the following pairs is a particle-antiparticle pair?
The positively charged part of the center of an atom is called -
Which of the following is NOT a constituent particle of an atom?
Which of the following statements is correct regarding atomic structure?
The number of electrons and neutrons in an element is 18 and 20 respectively. Its mass number is-
Atoms which have the same number of protons but different number of neutrons are called-
Which one of the following is NOT a subatomic particle?
The same kind of atoms are found in which of the following?
Which of the following particles is chargeless (neutral)?