A device used for the measurement of radioactivity is
1. mass spectrometer
2.cyclotron
3.nuclear reactor
4.G.M.counter
Posted Date:-2021-06-30 06:26:14
A particle which is similar to electron is
1.positron
2.beta particle
3.photon
4.mason
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An electrically charged atom or group of atoms is called
1. An ion
2.A meson
3.A electron
4.None of the above
Posted Date:-2021-06-30 06:26:14
ATP stands for -
1. Adenosine triphosphate
2.Alanine triphosphate
3.Adrenalin triphosphate
4. Asparagine triphosphate
Posted Date:-2021-06-30 06:26:14
Blue litmus paper is converted into red in solution of _______
1.Acid
2.Base
3.Alkali
4.Salt
Posted Date:-2021-06-30 06:26:14
Choose the pure substance from the list below.
1.Sugar
2.Lemonade
3.Air
4.Sea water
Posted Date:-2021-06-30 06:26:14
Curdling of milk is an example of
1.Inversion
2.Denaturation
3.Hydrolysis
4.Coagulation
Posted Date:-2021-06-30 06:26:14
Cutting and peeling of onion brings tears to the eyes because of the presence of _____ ?
1.Amino acid
2.Sulfur
3.Carbon
4.Fat
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Formation of cation occurs by
1. gain of electron
2.loss of electron
3.gain of proton
4.loss of proton
Posted Date:-2021-06-30 06:26:14
Gammaxene D.D.T. & Bleaching powder are important compounds of
1.Nitrogen
2.Phosphorus
3.Chlorine
4.Sulphur
Posted Date:-2021-06-30 06:26:14
Gold and silver are extracted from their respective ores by _______
1.Smelting
2.Roasting
3.Leaching
4.Hydro metallurgy
Posted Date:-2021-06-30 06:26:14
In nuclear reactor the speed of neutrons is slowed down by
1.heavy water
2. ordinary water
3. Zinc rods
4.molten caustic soda
Posted Date:-2021-06-30 06:26:14
In photography the compound of nitrogen used is
1.Potassium nitrate
2.Silver nitrate
3.Ammonium carbonate
4.Ammonium bicarbonate
Posted Date:-2021-06-30 06:26:14
Is SiCl4 polar or nonpolar?
1.Polar
2.non polar
3.Both A & B
4.None of the above
Posted Date:-2021-06-30 06:26:14
Milk is an example of a
1.Emulsion
2.Solution
3.Gel
4.Suspension
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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
Posted Date:-2021-06-30 06:26:14
Natural radioactivity was discovered by
1.Rutherford
2.Becquerel
3.Curie
4.Schmidt
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Of the following elements which one has the same oxidation state in all of its compounds?
1.Hydrogen
2.Fluroine
3.Carbon
4.oxygen
Posted Date:-2021-06-30 06:26:14
Permanent hardness of water is due to the presence of ?
1.Calcium sulphate
2.Calcium bicarbonate
3.Sodium bicarbonate
4. Magnesium bicarbonate
Posted Date:-2021-06-30 06:26:14
Species containing same number of electrons are called
1.Isotopes
2.Isobars
3.Isoelectronic
4.Isotones
Posted Date:-2021-06-30 06:26:14
Systematic name for (CuI)s ?
1.Copper Iodide
2.Cobalt Fluoride
3.Ferrous Oxide
4.All of the above
Posted Date:-2021-06-30 06:26:14
TEL minimise the knocking effect when mixed with petrol it acts as_______
1.Positive catalyst
2.Negative catalyst
3.Auto catalyst
4.Induced catalyst
Posted Date:-2021-06-30 06:26:14
The charge on positron is equal to the charge on
1.proton
2.electron
3.alpha- particle
4.neutron
Posted Date:-2021-06-30 06:26:14
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
Posted Date:-2021-06-30 06:26:14
The maximum number of electrons that can be accommodated in a shell depends on the formula
1.1n2
2.n2
3.3n2
4.2n2
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The monomer of polythene is
1.ethylene
2.ethyl alcohol
3.vinyl chloride
4.ethanol
Posted Date:-2021-06-30 06:26:14
Van der Waals equation explains the behaviour of _____
1.Ideal gases
2.Real gases
3.Mixture of gases
4.Diatomic gases
Posted Date:-2021-06-30 06:26:14
What does one mole of H2O correspond to
1.16 gms
2. 18 gms
3.20 gms
4.22 gms
Posted Date:-2021-06-30 06:26:14
What is the gram formula mass of Li2SO4?
1.101.2487
2.109.9446
3.111.2687
4.106.5871
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What is the primary component of natural gas?
1.Nitrogen
2.Ethane
3.Propane
4.Methane
Posted Date:-2021-06-30 06:26:14
Which bond has the greatest ionic character?
1.H-F
2.H-Cl
3.H-N
4.H-O
Posted Date:-2021-06-30 06:26:14
Which compound contains both ionic and covalent bonds?
1.NaNO3
2.CaSO4
3.NH4Cl
4.All of the above
Posted Date:-2021-06-30 06:26:14
Which compound forms a colored aqueous solution?
1.CrCl3
2.KBr
3.CaCl2
4.NaOH
Posted Date:-2021-06-30 06:26:14
Which element has similar properties to Beryllium?
1.Manganese
2.Calcium
3.Both A & B
4.Helium
Posted Date:-2021-06-30 06:26:14
Which gas is known as Fuel of Future ?
1.Methane
2.Oxygen
3.Neon
4.Hydrogen
Posted Date:-2021-06-30 06:26:14
Which metal pollute the air of a big city?
1.Chromium
2.Lead
3.Copper
4.Zinc
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Which of the following acts both as oxidising and reducing agent?
1.nitric acid
2.ammonia
3.nitrous acid
4. nitrogen peroxide
Posted Date:-2021-06-30 06:26:14
Which of the following does not contain the material particles
1.alpha - rays
2.beta - rays
3.gamma - rays
4.anode rays
Posted Date:-2021-06-30 06:26:14
Which of the following is a radioactive element
1.Sulphur
2.Polonium
3.Tellurium
4.Selenium
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Which of the following is a regenerated fibre?
1.Terylene
2.Rayon
3.Nylon
4.Silk
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Which of the following is called the King of Chemicals ?
1.Nitric acid
2.Hydrochloric acid
3.Silver nitrate
4.Sulphuric acid
Posted Date:-2021-06-30 06:26:14
Which of the following is not a compound?
1.Brass
2.Quick lime
3.Marble
4.Soda ash
Posted Date:-2021-06-30 06:26:14
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
Posted Date:-2021-06-30 06:26:14
Which of the following is the strongest base?
1.LiCH3
2.LiF
3.LiOH
4.LiNH2
Posted Date:-2021-06-30 06:26:14
Which of the following processes is used to remove reducible oxides from the metal?
1.liquation
2.cupellation
3.poling
4.electro refining
Posted Date:-2021-06-30 06:26:14
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
Posted Date:-2021-06-30 06:26:14
Which one of the following is an element?
1.Topaz
2.Rruby
3.Diamond
4.Sapphire
Posted Date:-2021-06-30 06:26:14
Which one of the following is not radioactive
1.Astanine
2.Francium
3.Tritium
4.Zirconium
Posted Date:-2021-06-30 06:26:14
Which sample of matter is a mixture?
1.KBr (S)
2. NaCl (L)
3.K (S)
4.NaCl (Aq)
Posted Date:-2021-06-30 06:26:14