A device used for the measurement of radioactivity is
1. mass spectrometer
2.cyclotron
3.nuclear reactor
4.G.M.counter
A particle which is similar to electron is
1.positron
2.beta particle
3.photon
4.mason
An electrically charged atom or group of atoms is called
1. An ion
2.A meson
3.A electron
4.None of the above
ATP stands for -
1. Adenosine triphosphate
2.Alanine triphosphate
3.Adrenalin triphosphate
4. Asparagine triphosphate
Blue litmus paper is converted into red in solution of _______
1.Acid
2.Base
3.Alkali
4.Salt
Choose the pure substance from the list below.
1.Sugar
2.Lemonade
3.Air
4.Sea water
Curdling of milk is an example of
1.Inversion
2.Denaturation
3.Hydrolysis
4.Coagulation
Cutting and peeling of onion brings tears to the eyes because of the presence of _____ ?
1.Amino acid
2.Sulfur
3.Carbon
4.Fat
Formation of cation occurs by
1. gain of electron
2.loss of electron
3.gain of proton
4.loss of proton
Gammaxene D.D.T. & Bleaching powder are important compounds of
1.Nitrogen
2.Phosphorus
3.Chlorine
4.Sulphur
Gold and silver are extracted from their respective ores by _______
1.Smelting
2.Roasting
3.Leaching
4.Hydro metallurgy
In nuclear reactor the speed of neutrons is slowed down by
1.heavy water
2. ordinary water
3. Zinc rods
4.molten caustic soda
In photography the compound of nitrogen used is
1.Potassium nitrate
2.Silver nitrate
3.Ammonium carbonate
4.Ammonium bicarbonate
Is SiCl4 polar or nonpolar?
1.Polar
2.non polar
3.Both A & B
4.None of the above
Milk is an example of a
1.Emulsion
2.Solution
3.Gel
4.Suspension
Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of ________
1.Moseleys work on X-ray spectra
2.Braggs work on X-ray diffraction
3.Mullikens oil drop experiment
4.Discovery of X-ray by Roentgen
Natural radioactivity was discovered by
1.Rutherford
2.Becquerel
3.Curie
4.Schmidt
Of the following elements which one has the same oxidation state in all of its compounds?
1.Hydrogen
2.Fluroine
3.Carbon
4.oxygen
Permanent hardness of water is due to the presence of ?
1.Calcium sulphate
2.Calcium bicarbonate
3.Sodium bicarbonate
4. Magnesium bicarbonate
Species containing same number of electrons are called
1.Isotopes
2.Isobars
3.Isoelectronic
4.Isotones
Systematic name for (CuI)s ?
1.Copper Iodide
2.Cobalt Fluoride
3.Ferrous Oxide
4.All of the above
TEL minimise the knocking effect when mixed with petrol it acts as_______
1.Positive catalyst
2.Negative catalyst
3.Auto catalyst
4.Induced catalyst
The charge on positron is equal to the charge on
1.proton
2.electron
3.alpha- particle
4.neutron
The magnetic moment (spin only) of [NiCl4]2?is
1.1.41 BM
2.1.82 BM
3.5.46 BM
4.2.82 BM
The maximum number of electrons that can be accommodated in a shell depends on the formula
1.1n2
2.n2
3.3n2
4.2n2
The monomer of polythene is
1.ethylene
2.ethyl alcohol
3.vinyl chloride
4.ethanol
Van der Waals equation explains the behaviour of _____
1.Ideal gases
2.Real gases
3.Mixture of gases
4.Diatomic gases
What does one mole of H2O correspond to
1.16 gms
2. 18 gms
3.20 gms
4.22 gms
What is the gram formula mass of Li2SO4?
1.101.2487
2.109.9446
3.111.2687
4.106.5871
What is the primary component of natural gas?
1.Nitrogen
2.Ethane
3.Propane
4.Methane
What is the primary component of natural gas?
1.Nitrogen
2.Ethane
3.Propane
4.Methane
Which bond has the greatest ionic character?
1.H-F
2.H-Cl
3.H-N
4.H-O
Which compound contains both ionic and covalent bonds?
1.NaNO3
2.CaSO4
3.NH4Cl
4.All of the above
Which compound forms a colored aqueous solution?
1.CrCl3
2.KBr
3.CaCl2
4.NaOH
Which element has similar properties to Beryllium?
1.Manganese
2.Calcium
3.Both A & B
4.Helium
Which gas is known as Fuel of Future ?
1.Methane
2.Oxygen
3.Neon
4.Hydrogen
Which metal pollute the air of a big city?
1.Chromium
2.Lead
3.Copper
4.Zinc
Which of the following acts both as oxidising and reducing agent?
1.nitric acid
2.ammonia
3.nitrous acid
4. nitrogen peroxide
Which of the following does not contain the material particles
1.alpha - rays
2.beta - rays
3.gamma - rays
4.anode rays
Which of the following is a radioactive element
1.Sulphur
2.Polonium
3.Tellurium
4.Selenium
Which of the following is a regenerated fibre?
1.Terylene
2.Rayon
3.Nylon
4.Silk
Which of the following is called the King of Chemicals ?
1.Nitric acid
2.Hydrochloric acid
3.Silver nitrate
4.Sulphuric acid
Which of the following is not a compound?
1.Brass
2.Quick lime
3.Marble
4.Soda ash
Which of the following is not a property of water?
1.Low density
2.Low specific heat
3. Low heat of vaporisation
4. All of the above
Which of the following is the strongest base?
1.LiCH3
2.LiF
3.LiOH
4.LiNH2
Which of the following processes is used to remove reducible oxides from the metal?
1.liquation
2.cupellation
3.poling
4.electro refining
Which of the following statement(s) is/are CORRECT? I. Acids are sour in taste and generate H+ ions. II. Acids are sour in taste and generate OH– ions. III. Bases are bitter intaste and generate OH– ions.
1.Only I and III
2.Only I and II
3.Only II and III
4.All I II and III
Which one of the following is an element?
1.Topaz
2.Rruby
3.Diamond
4.Sapphire
Which one of the following is not radioactive
1.Astanine
2.Francium
3.Tritium
4.Zirconium
Which sample of matter is a mixture?
1.KBr (S)
2. NaCl (L)
3.K (S)
4.NaCl (Aq)