How many atoms are present in end centred cubic unit cell?
We know that in end-centred cubic unit cell, 8 atoms are located on 8 corners of the cube and 1... View Article
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Select the aliphatic saturated hydrocarbon from the given list of hydrocarbons.
C5H12 is the molecular formula of Pentane which is a saturated hydrocarbon.
In Mendeleev’s periodic table, the groups were divided into how many subgroups?
The periodic table is composed of seven horizontal rows or periods and is numbered between 1 and 7. Elements are arranged in... View Article
An oxide that combines with water to give an acid is termed:
An oxide that combines with water to give an acid is termed acidic oxide.
In an electrolytic cell the signs of the cathode and anode are
In an electrolytic cell, the anode is positive and cathode is negative.
On what basis the laws of chemical combinations can be explained?
Dalton’s atomic theory could explain the laws of chemical combinations.
Biological catalysts (enzymes) belong to which of the following class of molecules?
Enzymes are nitrogenous organic compounds generally made of proteins.
In a solid, heat is transferred mainly by the process of :
In a solid, heat is transferred mainly by the process of conduction.
What are the molecules which concentrate and accumulate on the surface called?
The molecules which come and adhere on surface are called adsorbate.
Oxides of which elements dissolve in moisture and produce sulphuric acid?
Oxides of sulphur dissolve in moisture and produce sulphuric acid.
Name the layer that covers the lungs just like the human body is covered by the skin.
Pleura membrane surrounds the lungs and protects it from friction.
At what temperature the density of water is maximum? State its value.
At 40C, the density of water is maximum. Its value is 1000 kg m-3
What is the speed of the sound in a perfectly rigid rod?
Speed of the sound in a perfectly rigid rod would be infinite. For a perfectly rigid rod, the bulk modulus of... View Article
One of the uses of a cathode ray tube is: a. They are used in mobile phones and WiFi b. They are used to break DNA molecules c. They are used to check the waveforms of electric signals d. They are used in dental practices.
It is used for checking the waveforms of an electrical signal.
How many whole numbers are there between 32 and53?
What are whole numbers? The whole numbers are a collection of positive integers and zero and excluding fractions and negative integers. It... View Article
How many hours difference is there between the GMT and IST?
The difference between GMT and IST is 5 hours and 30 minutes
Angiosperms that bear parallel venation in leaves and fibrous roots are called:
Monocots bear parallel venation in leaves and fibrous roots.
Mendeleev predicted the existence of which element/elements in the periodic table?
Mendeleev predicted the existence of gallium and germanium.
A man in the lift weighs more, when the lift is a. accelerating upward b. moving up with constant velocity c. accelerating downward d. moving down with constant velocity
A person weighs more in a lift that is accelerating upward.
How many petals or its multiples are found in pentamerous flowers?
Pentamerous flowers have five or multiples of five petals.
