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Home
Questions & Answer
Science Questions & Answers
Chemistry Questions & Answers
Chemistry Questions & Answers
(Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)
Which of the following is halide ore
A
Dolomite
B
Rock salt
C
Bauxite
D
Galena
The major component of gas is
A
Ethane
B
Methane
C
Butane
D
Propane
Graphene is used for manufacturing bendable smart phones. What is the other field for which it can be used
A
Medical Radiation therapy
B
Super lenses
C
Quantum computers
D
Ultimate water purifier
Choose the correct equztion of aerobic respiration
A
C6H12O6 + 6O2 -> 6CO + 6H2O
B
C6H5O10 + 6CO2 -> 6CO + 5H2O2+2CO2
C
C6H12O6 + 6CO2 -> 6CO + 6H2O
D
C6H12O6 + 6O2 -> 6CO2 + 6H2O
Wood charcoal is used in gas masks because :
A
It is poisonous
B
It liquifies gas
C
It is porous
D
It adsorbs gases
A protein solution on warming with concentrated nitric acid may turn yellow called
A
Xanthoproteic test
B
Biuret test
C
Millions test
D
Hopkins cole test
The same group elements are characterized by :
A
Ionization potential
B
Electronegativity
C
Ionization
D
No. of electrons in the outermost shell
Acetyl salicyclic acid is known as :
A
Oil of wintergreen
B
Salol
C
Aspirin
D
Picric acid
The no.of milligrams of potassium hydroxide required to saponify one gram of a fat or oil :
A
Esterification
B
Saponification
C
Hydrogenation
D
Cleansing action
High boiling point of water is due to :
A
Weak dissocation of water molecules
B
High dissocaiation of water molecules
C
Hydrogen bonding amongst water molecule
D
Vander Waals forces of attraction amongst the modecule
Which of the following gives the correct increasing order of acidic strength
A
Water < Acetic acid < Hydrochloric acid
B
Water < Hydrochloric acid < Acetic acid
C
Acetic acid < Water < Hydrochloric acid
D
Hydrochloric acid < Water < Acetic acid
Gunmetal contains
A
Cu = 60 PERC, Sn = 40 PERC
B
Cu = 80 PERC, Sn = 20 PERC
C
Cu = 70 PERC, Sn = 30 PERC
D
Cu = 90 PERC, Sn = 10 PERC
Drinking alcohol is very harmful and it ruins the health ‘Drinking alcohol’ stands for
A
Drinking methyl alcohol
B
Drinking ethyl alcohol
C
Drinking propyl alcohol
D
Drinking isopropyl alcohol
Which of the following elements does not lose an electron easily
A
Mg
B
Na
C
K
D
Ca
Depletion of ozone is mainly due to
A
Chlorofluorocarbon
B
Carbon monoxide
C
Methane
D
Pesticides
Which one of the following is the process involved in photosynthesis?
A
Potential energy is released to form free energy
B
Free energy is converted into potential energy and stored
C
Food is oxidized to release carbon dioxide and water
D
Oxygen is taken, and carbon dioxide and water vapour are given out
Wliich one of the insect repellant is used to destroy mosquitoes in your house water storage?
A
TNP
B
BHC
C
DEET
D
TNT
The newly added element with atomic number 112 in the periodic table is
A
Bohrium
B
Meitnerium
C
Roentgenium
D
Copernicium
Pick the correct answer. Graphite can be converted into diamond by applying.
A
Applying pressure alone
B
Temperature 100°C and no pressure
C
Temperature 300°C and 1 atmospheric pressure (atm)
D
Temperature 3000oC and pressure 1,00,000 atm
Due to improper/indiscriminate disposal of old and used computers or their parts, which of the following are released into the environment as e-waste? 1. Beryllium 2. Cadmium 3. Chromium 4. Heptachlor 5. Mercury 6. Lead 7. Plutonium
A
1, 2, 3, 4, 5, 6 and 7
B
2, 4, 5 and 7 only
C
1, 2, 3, 5 and 6 only
D
1, 3, 4, 6 and 7 only
Acid rain is caused by the pollution of environment by
A
Ozone and carbon dioxide
B
Nitrous oxide and sulphur dioxide
C
Carbon monoxide and carbon dioxide
D
Carbon dioxide and nitrogen
Photochemical smog is a resultant of the reaction among
A
High concentration of N02, O3 and CO in the evening
B
CO, C02 and N02 at low temperature
C
CO, 02 and peroxyacetyl nitrate in the presence of sunlight
D
N02, 03 and peroxyacetyl nitrate in the presence of sunlight
What is Dry Ice
A
Solid H2O
B
Ice at minus 50 degrees C
C
NaCl Crystal
D
Solid carbon dioxide
Alcohol contains :
A
Hydrogen, chlorine, oxygen
B
Carbon, hydrogen, oxygen
C
Oxygen, carbon, nitrogen
D
Nitrogen, hydrogen, oxygen
Which of the following is a non-metallic mineral
A
Gypsum
B
Manganese
C
Magnesium
D
Bauxite
Which of the following produces highest amount of energy upon oxidation
A
Protein
B
Fat
C
An Alkane
D
Glucose
Eutrophication result in reduction of :
A
Dissolved nitrate
B
Parasitic protozoa
C
Dissolved oxygen
D
Mineral salt
Which of the following is a zinc diffusion process
A
Sherardizing
B
Parkerising
C
Anoding
D
Zincation
Which one is an organic acid
A
Nitric
B
Phosphoric
C
Citric
D
Sulphuric
The rock having calcium carbonate as main mineral constituent, is called
A
Sandy rock
B
Siliceous rock
C
Argillaceous rock
D
Calcareous rock
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