In ruby laser, the stimulated emission is due to transition from

A direct current I flows along the length of an infinitely long straight thin walled pipe, then the magnetic field is

convex lens made of glass has focal length 0.15m in air. If the refractive index of glass is 3/2, and that of water is 4/3 the focal length of lens when immersed in water is

Two sources are said to be coherent if they produce waves

Three resistors 1 Ω, 2 Ω, 3Ω resistor a 3 V battery is connected. The current through 3 Ω resistor is -

In a common emitter amplifier the input signal is applied across

Adding detergents to water helps in removing dirty greasy stains. This is because
1. It increases greasy stains. This is because
2. It decreases the oil-water surface tension
3. It increases the viscosity of the solution
4. Dirt is held suspended surrounded by detergent molecules

Choose the correct statement (a) for a cricket ball that is spinning clockwise through air
S1 : Statemlines of air are symmetric around the ball.
S2 : The velocity of air above the ball relative to it is larger than that below the ball.
S3 : The velocity of air above the ball relative to it is smaller than that below the ball.
S4 : There is a net upward force on the ball.

Ferromagnetic materials used in a transformer must have

According to Newton’s corpuscular theory, the speed of light is

10^-6 M NaOH is diluted 100 times. The pH of the diluted base is

In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under STP condition. The current to be passed is

The one which decreases with dilution is

Vapour pressure of pure ‘A’ is 70 mm of Hg at 25^oC. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. if the vapour pressure of the solution is 84 mm of Hg at 25^oC, the vapour pressure of pure ‘B’ at 25^oC is

A 6% solution of urea is isotonic with

In countries nearer to polar region, the roads are sprinkled with CaCl₂. This is

A compound of ‘A’ and ‘B’ crystallises in a cubic lattice in which ‘A’ atoms occupy the lattice points at the corners of the cube. The ‘B’ atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is

In electrophilic aromatic substitution reaction, the nitro group is meta directing because it

The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with

The carbon bond length in benzene is

The respiratory quotient during cellular respiration would depend on

Which of the following is not a green - house gas ?

Both husband and wife have normal vision though their fathers were colorblind and mothers did not have any gene for colorblindness. The probability of their daughters becoming colorblind is

An animal, which has both exoskeleton and endoskeleton structures is a

Identify the group, which includes animals all of which give birth to young ones directly?

Compare the statement A and B.
Statement A Blood sugar level falls rapidly after hepatectomy.
Statement B The glycogen of the liver is the principal source of blood sugar.
Select the correct description.

What is/are true about heart wood?
(A) It does not help in water conduction.
(B) It is also called laburnum.
(C) It is dark in colour but very soft.
(D) It has tracheary elements which are filled with tannin, resin, etc.

Compare the statements A and B.
Statement A Auxins promote apical dominance by suppressing the activity of lateral buds.
Statement B In moriculature, periodic pruning of shoot tips is done to make mulberry plants bushy.
Select the correct description.

Bryophytes resemble algae is the following aspects

Stoma opens, when

Which scientist identified *Mycobacterium tuberculosis* as the causative agent of tuberculosis? 

Father of antiseptic surgery is

Which process developed by Louis Pasteur uses controlled heating to reduce harmful microorganisms in beverages?

Which combination represents the WHO-recommended multidrug therapy for leprosy?

Mycobacterium tuberculosis is also known as

Who developed the first practical electron microscope?

Which of the following organisms is NOT acid-fast?

In bacteria, the electron transport chain responsible for aerobic respiration is primarily located in which structure?

Which bacterial structure can help prevent phagocytosis by host immune cells?

What term describes spherical bacteria arranged in chains?

Coma shaped bacteria are known as

Which of the following is most resistant to sterilization ?

Which method is commonly used for high-level disinfection of heat-sensitive flexible endoscopes?

Which of the following is a classical transport medium used for stool specimens suspected of containing *Vibrio cholerae*?

Which of the following is an enriched culture medium?

Which of the following factor does not affect microbial growth ?

Agar concentration required to prepare nutrient agar is :

HIV is a

MRSA is mediated due to