Q.1:- A bond formed by sharing of electrons between atoms of the elements is called ?
- Ionic Bond
- Covalent Bond
- Co-ordinate Bond
- None of the above
Q.2:- A radioactive substance has a half-life of four months. Three-fourth of the substance would decay in ?
- 3 months
- 4 months
- 8 months
- 12 months
Q.3:- Formation of cation occurs by ?
- Gain of electron
- Loss of electron
- Gain of proton
- Loss of proton
Q.4:- What is neuron ? [SSC Exam 2013]
- The anti-particle of neutron
- Basic unit of nervous system
- Basic unit of energy
- Particle released during radioactivity
Q.5:- “Yellow Cake” an item of smuggling across border is ? [IAS Exams 1995]
- A crude from of Heroin
- A crude form of cocaine
- Uranium Oxide
- Unrefined gold
Q.6:- A base is a substance which ?
- Donates electrons
- Accepts proton
- Gives OH– ions in water
- All of the above
Q.7:- The mass of 6.02 x 1023 molecules of CO is ?
- 28g
- 14g
- 0g
- 56g
Q.8:- Source of Vitamin C is ?
- Nitric Acid
- Ascorbic Acid
- Oxalic Acid
- Maleic Acid
Q.9:- An intensive property in thermodynamics means a property which depends ?
- On the amount of the substance only
- On the nature of the substance only
- Both on the amount as well as nature of the substance
- Neither on the amount nor on the nature
Q.10:- An example of an autocatalytic reaction is ?
- Hydrogenation of Oil
- Decomposition of Nitroglycerine
- Oxidation of Na2AsO3 in presence of Na2SO3
- Thermal decomposition of KClO3 in presence of MnO2
Q.11:- When ammonium chloride is dissolved in water, the solution becomes cold. The change is ?
- Endothermic
- Exothermic
- Supercooling
- None of these
Q.12:- Which one is known as father of periodic table ?
- Lavoisier
- Rutherford
- Mendeleev
- Bohr
Q.13:- Octane number of fuel can be increased by ?
- Isomerisation
- Alkylation
- Reforming
- All of the above
Q.14:- The standard state in chemical energetics implies ?
- 1 atm pressure at 273 K
- 1 atm pressure at 298 K
- 1 Bar pressure at 298 K
- 1 Bar pressure at specified temperature
Q.15:- In modern periodic table, the number of period is ?
- 2
- 6
- 7
- 8
Q.16:- When a gas is subjected to adiabatic expansion, it gets cooled due to ?
- No change in entropy
- Loss in kinetic energy
- Decrease in velocity
- Energy spent in doing work
Q.17:- The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all ?
- Inert Gas
- Light Metals
- Halogens
- Rare Earth Metals
Q.18:- Which of the following is the smallest cation ? [Raj. PMT Exam 1998]
- Na+
- Mg2+
- Li+
- Be++
Q.19:- Transition metals are often paramagnetic owing to ?
- High M.P. and B.P.
- The presence of vacant orbitals
- The presence of unpaired electrons
- Malleability and ductility
Q.20:- Faraday constant ?
- Depends on equivalent
- Is a numerical constant
- Depends on the number of electrons
- Depends upon the current passed
Q.21:- The number of mole of solute per kilogram solvent is called ?
- Molarity
- Molality
- Normality
- None of the above
Q.22:- Use of electrolysis is ?
- Electroplating
- Electro-Refining
- Both (A) and (B)
- None of the above
Q.23:- Alum purifies muddy water by ?
- Absorption
- Dialysis
- Emulsifying properties
- Coagulation
Q.24:- Cod liver is an example of ?
- Oil emulsion
- Oil in water emulsion
- Water in oil emulsion
- Water in water emulsion
Q.25:- Reverse of swelling of gel is known as ?
- Syneresis
- Thixotropy
- Sorption
- None of the above