PCB QUIZ for NEET

A SPIROMETER CAN'T BE USED TO MEASURES

A tank is filled with water to a height of 12 cm. The apparent depth of a needle lying at the bottom of needle lying at the the tank is measured by a microscope to be 9 cm. What is the refractive index of water?

In half wave rectification, if the input frequency is 60 Hz, then the output frequency would be

A plano-convex lens of unknown material and unknown focal length is given. With the help of a spherometer we can measure the

Statement-I : Hot water is less viscous than of cold water. Statement-II: Surface tension of soap bubble is more than that of a drop of water.

During microsporogenesis , which phase of mitosis is crutial for formation of microspore tetrad ?

Question = Number of total meosis required for formation of 63 seeds =

Number of chiral carbon 8n = 1 - chloro - 3 - methyl cyclo hexane

In octahedral complex central metal ion is Fe{+3} . In presence of strong field ligand it shows paramagnetic character due to presence of :

Biology = What is wrong for true breeding .?

A. 2 identical spheres are placed 1m apart. A point object placed at midpoint along line joining their centres will be in unstable equilibrium B. If 0 of potential energy is at ♾️ then total energy of orbiting satellite is negative of potential energy

X = Couple do not use device in natural methods for conception Y = In natural method , couple mainly avoid the sexual intercourse from day 10 to 17 of menstrual cycle

The organisms which cause diseases in plants and animals are called :-

What is not true for genetic code?

: Which enzyme catalyzes the reaction of ATP formation during chemiosmosis?

Pyq based - What is false about - " Alstonia " ?

The endomembrane system of a eukaryotic cell does not include: 1. Endoplasmic reticulum 2. Lysosome 3. Vacuole 4. Peroxisome

Heat is being supplied at a constant rate to a sphere of ice which is melting at the rate of 0.1 gram / sec Now it melts completely in 100 sec . The rate of rise of temperature will be =

X = PH₃ acts as a lewis base Y = Covalancy of F is 03 in FCl₃

Initially a solid is completely immersed in water at 1°C and the coefficient of its volumetric expansion is equal in magnitude with the coefficient of volumetric expansion of water. When the temperature is increased to 3.5°C- [ Fb- buoyancy force ]