List of top Science Questions

Assertion (A) : A rainbow is an artificial spectrum of white light appearing in the sky after a rain shower.
Reason (R) : The water droplets act like small prisms.

Assertion (A) : A hormone called abscisic acid inhibits growth in plants.
Reason (R) : The role of auxins is opposite to that of abscisic acid in plants.

When an object is placed beyond 2F of a convex lens, the nature of the image formed is :

When a narrow beam of white light passes through a glass prism it splits into its component colours. This phenomenon is called :

A material used for making heating elements of electrical heating devices should have :

The organism in which an outgrowth on the parent body develops into a new individual is :

In a cross between pure tall pea plants (TT) and pure dwarf pea plants (tt) the offsprings of F$_1$ generation were all tall. When F$_1$ generation was self-crossed, the gene combinations of the offsprings of F$_2$ generation will be :

Which one of the following metals is malleable and a poor conductor of electricity ?

2 g of yellow sulphur powder is burnt in a china dish and the fumes are collected in a test tube. Water is added in the test tube and the solution is tested separately with blue and red litmus paper. The correct option is :

Which one of the following molecules is produced initially when glucose breaks down in the cytoplasm of a cell in aerobic as well as anaerobic respiration ?

As compared to daytime, the amount of carbon dioxide released by the plants during night is more because :

Consider the following substances : (i) Acidified K$_2$Cr$_2$O$_7$
(ii) Alkaline KMnO$_4$
(iii) Oxygen
(iv) Hydrogen
Out of these, the commonly used oxidising agents are :

Measure of mass of water vapour for a given mass of dry air (in g/kg) is referred to as

Arrange the coal types from lowest to highest rank?
(A) Brown coal
(B) Sub bituminous
(C) Hard coal
(D) Soft coal
Choose the correct answer from the options given below:

Identify the correct classification of resources based on supply.

Which macro-nuutrient intake during training session is advisable to be concentrated upon with highest percentage in daily diet.

Which of the following statements are correct with regard to daily energy requirements?
A. Proteins are major source of energy
B. For every kg. of body weight 1.3 calories of energy is required every 24 hrs.
C. 25% of fat is required in the diet.
D. Approximately 60% of energy shall come from carbohydrate
E. The consumption of excess fat, prior to exercise increase the performance.
Choose the correct answer from the options given below :

Name the component which protect and regulates various body processes.

Glycogen-storage can be used by an individual during____.

Newton's first law of motion is also known as -

If a gear 'A' having 50 teeth and running at a speed of 200 rpm is driving to another gear 'B' having 125 rpm. How many number of teeth are there in gear 'B'?

A 6-hour storm with hourly intersities of 7, 18, 25, 12, 10 and 3mm per hour produced a run off 33 mm. Then the Φ index is

What is the effective atomic number (EAN) of [Cd(NH₃)₄]²⁺ ?

The correct statements are:
A. Energy payback time (EPBT) should be less than life of PV System
B. Life cycle conversion efficiency (LCCE) should be less than one
C. Energy production factor (CEPF) on life time basis should be more than one
D. Carbon emission is more if electrical power is generated by PV in comparision to the electrical power generated by conventional power plant
Choose the correct answer from the options given below:

The Gondwana coals formed during-