The focal length of a converging lens is measured for violet, green, red and yellow colours. Arrange the focal length for different colours in increasing order.
(A) fv
(B) fg
(C) fr
(D) fy
Choose the correct answer from the options given below:

Match List-I with List-II:

List-I (Name of the Particle)	List-II (Charge and Mass)
(A) Proton	(I) +2e; 4u
(B) Neutron	(II) +e; 1u
(C) Deuteron	(III) 0; 1u
(D) \( \alpha \) particle	(IV) +e; 2u

The colour of the third band of a colour coded carbon resistor of resistance \(2.3 \times 10^2 \Omega\) would be

In a common emitter transistor amplifier current gain is 9 and resistance gain is 20. The voltage gain will be :

The ratio of the Nuclear density of the gold isotope \(^{197}_{79}\text{Au}\) and the silver isotope \(^{107}_{47}\text{Ag}\) is :

The following that is not transported by Electromagnetic waves is :

The magnetic susceptibility of material is \( \chi = -1 \) and relative magnetic permeability is zero. Then the type of material is

Observe the figure and answer the following:


Stabilisation by natural selection means:

Read the Passage carefully and answer the Questions
Kinetic studies not only help us to determine the rate of a chemical reaction but also describe the conditions by which the reaction rates can be altered.
The factors such as concentration, temperature, pressure and catalyst affect the rate of a reaction.
The speed of a reaction or the rate of a reaction can be defined as the change in concentration of a reactant or product in unit time.
Rate \(=k[A]^x[B]^y\)
Here \(k\) is the rate constant
\(z+y\) gives the overall order of a reaction, whereas \(z\) and \(y\) represent the order with respect to the reactants \(A\) and \(B\), respectively.
The order of a reaction which does not exist is:

Which one of the following has a large reservoir of erythrocytes ?

Read the following paragraph carefully and answer the given questions.
Certain types of leukocytes (WBC) of our body like polymorpho-nuclear leukocytes (PMNL-neutrophils) and monocytes and natural killer (type of lymphocytes) in the blood as well as macrophages in tissues can phagocytose and destroy microbes. For determining the cause of allergy, the patient is exposed to or injected with very small doses of possible allergens, and the reactions studied. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Heroin, commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal.
Which of the following drugs are commonly used to quickly reduce the symptoms of allergy?

Arrange the following electromagnetic waves in the increasing order of their wavelength.
(A) X-rays
(B) Radio waves
(C) Gamma rays
(D) Microwaves
Choose the correct answer from the options given below:

Reduction of nitrobenzene gives