List of top Science Questions

Explain the following by giving examples:

Importance of pH in daily life
Exothermic chemical reactions
Explain the production of a magnetic field due to current in a conductor by making a diagram.
A common unisexual male flower doesn’t have:
Draw a ray diagram in order to obtain a virtual image of an object by a concave mirror. Write down any one use of this mirror.
The principle of organic evolution was propounded by:
On burning, fossil fuel gives:
Which of the following pair is used in the reaction of photosynthesis?
Insulin is secreted by:
On going down a group, the size of an atom increases because:
The pH value of pure water remains:
The chemical formula of Plaster of Paris is:
The IUPAC name of \( \text{CH}_3\text{CH}_2\text{OH} \) is:
The functional group in Aldehyde is:
Which of the following is a combustion reaction?
Which of the following is a producer?
Power of a lens is -2.5 D. The focal length and nature of the lens is:
Speed of light in medium (1) and medium (2) are \( v_1 \) and \( v_2 \) respectively, then the refractive index of medium (1) with respect to medium (2) is:
Which of the following statements is false?
Write an essay on Sexual Reproduction in Flowering Plants
In which of the following mirrors, the field of view is maximum?
If electric power and resistance are expressed as \( P \) and \( R \) respectively, then electric current is expressed as:
What is the total resistance of two resistors, \( R \) and \( 2R \), when they are connected in parallel?
The number of turns is increased by \( n \) times in a current-carrying circular coil. Then the magnetic field at the center of the coil is:
In order to save the environment, describe the five types of ‘R’.
Give an account of post-fertilization changes in an angiospermic plant.