When forces are acting on a particle of mass *m* such that and are mutually perpendicular, then the particle remains stationary. If the force is now removed then the acceleration of the particle is

If a lift is moving down with acceleration *a*. A man in the lift drops a ball inside the lift. What is the acceleration of the ball by the man in the lift and a man standing stationary on the ground?

What is the minimum velocity with which a car driver can traverse a flat curve of radius 150 m and coefficient of friction 0.6 to avoid skidding?

A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m which applying the force and the ball goes upto 2 m height further, find the magnitude of the force. Consider g = 10 m/s2

The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol–1. The energy required to excite the electron in the atom from n=1 to n=2 is

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately

The de Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 metres per second is approximately

In a multielectron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?

(i) n=1,l=0,m=0

(ii) n=2,l=0,m=0

(iii) n=2,l=1,m=1

(iv) n=3,l=2,m=1

(v) n=3,l=2,m=0

According to Bohr’s theory, the angular momentum of an electron in 5th orbit is

Uncertainty in position of a minute particle of mass 25 g in space is 10–5 m. What is the uncertainty in velocity?

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following interorbit jumps of the electron for Bohr orbits in an atom of hydrogen?

In a hydrogen atom, if energy of an electron in ground state is 13.6 eV, then that in the 2nd excited state is

Number of sigma bonds in is

In which of the following species the interatomic bond angle is 109° 28'?

What is the Significance of mitosis

Explain Mitosis or Equational Division

What is Cell Division.

Explain Cell Cycle .

Explain the Inhibition of Enzyme Action

Explain Factors Affecting Enzyme Activity :

Explain The Activation Energy?

Explain The Mechanism of Enzyme Action :

What is ENZYMES

What is PRIMARY AND SECONDARY METABOLITES:

What is NUCLEIC ACIDS

What is NUCLEOTIDES

Comparison of various Polysccharides

Explain te Function of Proteins.

Explain the Structure of Proteins

What is PROTEINS.

What is the Function of LIPID.

What is LIPID.

What is the Function of Glycogen

What is the location of Glycogen.

What is function of starch.

What is location of Starch

What is Function of cellulose.

What is location of cellulose

WHat is CARBOHYDRATES

What is BioMolecules ,macromolecules. micromolecules.

If n arithmetic means are inserted between 20 and 80 such that the ratio of first mean to the last mean is 1:3, then find the value of n?

If the fifth term of G.P is 81 and second term is 24.Find the common ratio.

The metal extracted by leaching with a cyanide is

For an aqueous solution, freezing point is - 0.186°C. Elevation of the boiling point of the same solution is *(K _{f} = *1.86° mo1

^{-1}kg and K

_{b}= 0.512° mol

^{-1}kg)

Aluminium is extracted by the electrolysis of alumina / bauxite / molten cryolite / alumina mixed with molten cryolite

In a mixture of *A *and *B, *components show negative deviation when :

is emitted in a radioactive reaction when

Heat required to raise the temperature of 1 mole of a substance by 1° is called?

Solubility of Ca(OH)_{2} is s mol L^{-1.} What is the solubility product (K_{sp}) under the same condition?

Explain the Structure and Function Centrosome and Centrioles.