Q.1:- Which of the following electromagnetic wave has the longest wave length ?
- Infrared Rays
- Gamma Rays
- Light Rays
- Ultra Violet Rays
Q.2:- Whose experiment proved that the speed of light was always the same ?
- James Clark Maxwell
- Michelson and Morley
- Miller and Stanley
- Werner Heisenberg
Q.3:- The Alpha particles carries two positive charges. Its mass is very nearly equal to that of ?
- Two protons
- An atom of Helium
- Sum of masses of two positron and two neutrons
- Two positron as each positron carries a single positive charge
Q.4:- An aqueous solution of Copper Sulphate is acidic in nature because the salt undergoes ?
- Dialysis
- Electrolysis
- Hydrolysis
- Photolysis
Q.5:- The purpose of smelting an ore to ?
- Reduce it
- Oxide it
- Obtain an alloy
- Separate volatile impurities
Q.6:- The formation of colloid from suspension is ?
- Peptisation
- Condensation
- Sedimentation
- None of these
Q.7:- Milk is an example of ?
- Oil in water emulsion
- Water in oil emulsion
- Fat in oil emulsion
- Fat in water emulsion
Q.8:- A colloid always has ?
- Two phases
- True solution
- Three phases
- Solute particles in water
Q.9:- The atomic orbital is ?
- The circular path of the electron
- Elliptical shaped orbit
- Three dimensional field around nucleus
- The region in which there is maximum probability of finding electron
Q.10:- The three basic components of an atom are ?
- Protons, Neutrons and Ions
- Protons, Neutrons and Electrons
- Protium, Deuterium and Tritium
- Protons, Neutrons and Ions
Q.11:- In a given atom, no two electrons can have the same value for all the four quantum number. This is called ?
- Hund’s Rule
- Pauli’s exclusion principle
- Uncertainty principle
- Aufbau’s principle
Q.12:- The concept of dual nature of radiation was proposed by ?
- Max Planck
- De-Broglie
- Heisenberg
- Pauling
Q.13:- The total number of orbitals in principal shell is ?
- n2
- n
- 2n2
- 3n2
Q.14:- The activity or radioisotope change with ?
- Temperature
- Pressure
- Chemical Environment
- None of these
Q.15:- Species containing same number of electrons are called ?
- Isotopes
- Isobars
- Isoelectronic
- Isotones
Q.16:- Wavelength of which of the following colours of the visible spectrum of light are maximally absorbed by green plants ?
- Green and Yellow
- Red and Blue
- Green and Red
- Blue and Yellow
Q.17:- The photoelectric effect is described as the ejection of electrons from the surface of a metal when ?
- It is heated
- It is placed in strong electric field
- Electrons of suitable velocity impinge on it
- Light of suitable wavelength falls on it
Q.18:- Meson was discovered by ?
- Powell
- Seaburg
- Anderson
- Yukawa
Q.19:- Which one is not the isotopes of Hydrogen ?
- Protium
- Eritium
- Deuterium
- Tritium
Q.20:- A redox reaction is ?
- Proton transfer reaction
- Ion combination reaction
- A reaction is solution
- Electron transfer reaction
Q.21:- Starch Iodide paper is used to test for the presence of ?
- Iodine
- Iodide Iron
- Oxidising Agent
- Reducing Agent
Q.22:- An acid is a substance which ?
- Donates a proton
- Accepts an electron
- Give H+ in water
- All
Q.23:- Uric acid is present in ?
- Soda Water
- Rancid Butter
- Sour Milk
- Urine of Mammals
Q.24:- A gas expands isothermally and reversibly. The work done by the gas is ?
- Zero
- Maximum
- Minimum
- Cannot be determined
Q.25:- The biocatalysts are ?
- Enzymes
- Minerals
- Plants
- All Proteins