Q.1:- Which of the following is a mixture ?
- Distilled water
- Gasoline
- Liquefied Petroleum Gas
- Both (B) & (C)
Q.2:- The discovery of Neutron became very late because ?
- It is present in nucleus
- It is a fundamental particle
- It does not move
- It does not carry any charge
Q.3:- Atoms having the same number of protons but different number of neutrons are called ? [SSC Exams 2015]
- Isotopes
- Anions
- Higgs-Boson
- Cations
Q.4:- Nuclear particles responsible for holding all nucleons together are ?
- Electrons
- Neutrons
- Positron
- Mesons
Q.5:- The atoms of the elements having same atomic number but different mass number are called ?
- Isobar
- Iso-Electronic
- Isotopes
- Isotones
Q.6:- A device used for the measurement of radioactivity is ?
- Mass Spectrometer
- Cyclotron
- Nuclear Reactor
- M. Counter
Q.7:- The heaviest naturally occurring elements is ? [SSC Exams 2013]
- Thorium
- Uranium
- Mercury
- Polonium
Q.8:- Doubled bond occurs in ?
- CH4
- C2H6
- C2H4
- C2H2
Q.9:- Which has covalent bond ?
- Na2S
- AlCl3
- NaH
- MgCl2
Q.10:- The conversion of Fe++ to Fe+++ is ? [NDA Exam 2004]
- Oxidation
- Reduction
- Ionisation
- Nuclear Reaction
Q.11:- Oxidation state of C in Oxalic Acid (H2C2O4) is ?
- +4
- +2
- +3
- +1
Q.12:- pH value of alkaline solutions is ?
- <7
- 7
- >7
- None of the above
Q.13:- Absolute zero is the temperature where all gases are expected to have ?
- Difference volumes
- Same volume
- Zero volume
- None of these
Q.14:- An ideal gas is one which obeys ?
- Gas laws
- Boyle’s laws
- Charle’s laws
- Avogadro’s law
Q.15:- Substance which alter the velocity of reaction themselves remaining chemically and quantitatively unchanged after reaction are known as ?
- Indicators
- Catalysts
- Adsorbates
- Surfactants
Q.16:- Which of the following is closed system ?
- Jet engine
- Tea placed in steel kettle
- Pressure cooker
- Rocket engine during propulsion
Q.17:- During isothermal expansion of an ideal gas, its ?
- Internal Energy Increases
- Enthalpy Decreases
- Enthalpy Remains Unaffected
- Enthalpy Reduces to Zero
Q.18:- A mixture of Carbon Monoxide and Hydrogen is ?
- Producer Gas
- Water Gas
- Natural Gas
- None of the above
Q.19:- A spontaneous change is one in which there is ? [SSC Exam 2013]
- Increase in free energy
- An increase in Internal energy
- A lowering of entropy
- A lowering of free energy
Q.20:- The calculation of electronegativities was first done by ?
- Slater
- Pauling
- Bohr
- Mulliken
Q.21:- Which of the following ions will form most water soluble hydroxide ?
- K+
- Ni++
- Zn++
- Al+++
Q.22:- Unit of molarity is known as ?
- Mol Lit-1
- Mole Kg-1
- Gram Equiv. Lit-1
- None of the above
Q.23:- A solution which contains the maximum amount of the solute that can be dissolved in a given amount of solvent a particular temperature is called ?
- Saturated Solution
- Unsaturated Solution
- Super Saturated Solution
- None of the above
Q.24:- In Electro-refining, the pure metal is deposited on ? [SSC Exams 2013]
- Cathode
- Anode
- Vessel
- Electrolyte
Q.25:- For which of the following cells, the standard cell voltage is zero ?
- Electrolytic cell
- Concentration cell
- Daniel cell
- Fuel cell