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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)
Glass is attacked by which of the following
A
Hydrogen fluoride
B
Hydrogen bromide
C
Hydrogen iodide
D
Hydrogen chloride
If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be
A
20°C
B
0°C
C
40°C
D
80°C
Taj Mahal is threatened due to the effect of
A
Hydrogen
B
Oxygen
C
Sulphur dioxide
D
Chlorine
Neutrons are present in all atoms except
A
Hydrogen
B
Nitrogen
C
Carbon
D
Helium
Which of the following liquids has maximum density
A
Ether
B
Alcohol
C
Mercury
D
Water
Which one is a gas
A
All of the above
B
Iodine
C
Chlorine
D
Bromine
A three-carbon chain with a double bond is called propene and if it has a triple bond, it would be called
A
Propanal
B
Propin
C
Propyne
D
Propanone
Starting with the same initial, conditions, an ideal gas expands from volume V to V2 in three different f ways. The work done by the gas is Wu if the process is purely isothermal; W2, if purely isobaric and Wj, if purely adiabatic. Then I
A
W1 > W2 > W2
B
W1 > W2 > W3
C
W2 > W3 > Wl
D
W2 > W1 > W3
Methane gas
A
ProduceS Very strong acid
B
Is a radioactive pollutant
C
Is harmful to the ozone layer
D
Is a greenhouse gas
Low-carbon steel (mild steel) has
A
A is true, R is false
B
A moving-coil instrument has a resistance of 10 ?. and gives a full-scale deflection when carrying a current of 50 mA. What external resistance should be connected so that the instrument can be used to measure current up to 50 A
C
Hyderabad University
D
1212
In how many vertical columns (groups) are the elements in the modern Periodic Table arranged
A
18
B
17
C
16
D
15
The treatment of the ore with suitable reagents which can selectively dissolve the ore but not the impurities, is known as
A
Amalgamation
B
Smelting
C
Roasting
D
Leaching
Ozone at the higher levels of the atmosphere is a product of
A
Ultraviolet radiation acting on oxygen molecules
B
Ultraviolet radiation acting on nitrogen molecules
C
Infrared radiation acting on nitrogen molecules
D
Infrared radiation acting on oxygen molecules
Sucrose is a
A
Polysaccharides
B
Disaccharides
C
Monosaccharides
D
Hexose
Which one of the acids is not a mineral acid
A
HCI
B
H2SO4
C
CH3 COOH
D
HNO3
An ingredient of anticoagulant solution used for storage of whole blood
A
Ascorbic acid
B
Anhydrous benzoic acid
C
Anhydrous Tartaric acid
D
Anhydrous citric acid
Epsom Salt is
A
Calcium sulphate
B
Ferrous Sulphate
C
Copper Sulphate
D
Magnesium Sulphate
2 Acetoxy benzoic acid is
A
Benzocaine
B
Aspirin
C
PABA
D
Paraben
Potassium permanganate is an example for
A
Oxidising agent
B
Reducing agent
C
Alkalising agent
D
Acidifying agent
Calamine IP is
A
Zinc oxde with ferric oxide
B
Calcium oxide with ferric oxide
C
Magnesium silicate with ferric oxide
D
Aluminium silicate with ferric oxide
The ozone layer restricts:
A
Ultraviolet radiation
B
Infrared radiation
C
X-rays and gamma rays
D
Visible Light
The refrigerant commonly used in domestic refrigerator is:
A
Neon
B
None of the above
C
Ammonia
D
Alcohol
Who discovered the element of oxygen
A
Cavendish
B
Dalton
C
Priestley
D
Alfred Nobel
The most important stimulus in tea leaves is :
A
None of the above
B
Phenylalanine
C
Brucine
D
Caffeine
In quick setting cement, the compound added is
A
Calcium sulphate
B
Gypsum
C
Aluminium silicate
D
Aluminium sulphate
Marie Curie won a Nobel Prize for her study of what
A
Aurum
B
Plutonium
C
Radium
D
Uranium
Thermal pollution is the rise in the temperature of a natural water body caused by human influence. Elevated water temperature
A
May increase or decrease oxygen level
B
Does not affect oxygen level
C
Decreases oxygen level
D
Increases oxygen level
Basalt is
A
An igneous rock and mostly contains quartz
B
An igneous rock and mostly contains felspar and pyroxene
C
A metamorphic rock and mostly contains quartz
D
A metamorphic rock and mostly contains felspar and pyroxene
“Atoms can neither be created nor destroyed.” This principle was given by __?
A
Niels Bohr
B
Rutherford
C
Dalton
D
Avogadro
2,4-D, which is sold as a weed killer of the broad-leaved weeds is a synthetic version of __:
A
None of them
B
Xylitol
C
Cytokinin Hormone
D
Auxin Hormone
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