List of practice Questions

The correct order of increasing chemical reactivity of the following metals is:
Ammonia evolved from \(0.75\,\text{g}\) of the soil sample in the Kjeldahl’s method for nitrogen estimation neutralises \(10\,\text{mL}\) of \(1\,\text{M}\) \(H_2SO_4\). Find the percentage of nitrogen present in the soil.
The main constituent of vinegar is:
Which of the following pair is/are correctly matched?

Isotopes : Atoms with same atomic number but different atomic mass
Isobars : Atoms with same number of neutrons but different atomic number
Isotones : Atoms with same mass number but different atomic number
Select the correct answer using the code given below:
The early attempt to classify elements as metals and non-metals was made by:
The long form of the periodic table consists of:
The octet rule is not valid for which one of the following molecules?
The rusting of an iron nail:
Which one of the following salts when dissolved in water makes the solution basic?
Which of the following is a false statement?
The phenomenon that best supports the theory that matter has a wave nature is:
G. P. Thomson experimentally confirmed the existence of matter waves by the phenomenon of:
Which of the following is not a synthetic fibre?
Which one is a sublime substance?
The process of change of liquid state into gaseous state at constant temperature is known as:
Which one among the following statements about atoms is not correct?
Which of the following temperatures is the highest?
Direction of conventional current is from:
Among the following statements:

A discharge lamp uses a discharge tube which is filled with a gas at a very low pressure.
Always white light is emitted independent of gas taken in the lamp.
Among identical spheres A and B having charges as \(-5\,\text{C}\) and \(-16\,\text{C}\):
For an object at infinity, a concave mirror produces an image at its focus which is:
According to the laws of reflection:
The acceleration due to gravity:
Buoyant force on an object due to fluid always acts:
A wooden cube floating in water supports a mass \(m = 0.2\,\text{kg}\) on its top. When the mass is removed, the cube rises by \(2\,\text{cm}\). The side of the cube is (density of water \(= 10^3\,\text{kg/m}^3\)):