List of practice Questions

250 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m then the load is lifted to 3m, the efficiency of pulley system will be : -
Which of the following electromagnetic radiations have the longest wavelength ?
A black body has maximum wavelength 1 m at 2000 K. Its corresponding wavelength at 3000 K will be
Soil conservation is
Theory of inheritance of acquired characters was given by
Polyribosomes are aggregation of
\(K_1\) and \(K_2\) are equilibrium constant for reactions (i) and (ii) 
(i) \(N_2 ( g ) + O_2 ( g ) \leftrightharpoons 2 NO ( g)\)
(ii) \(NO ( g ) \leftrightharpoons \frac{1}{2} N_2 ( g ) + \frac{ 1}{ 2} O_2 ( g )\).Then,
A batsman hits back a ball straight in the direction of the bowler without changing its initial speed of $12 ms^{-1}$. If the mass of the ball is 0.15 kg, the imparted to the ball is
Histamine secreting cells are found in
Arteries carry oxygenated blood except
The average binding energy of a nucleon inside an atomic nucleus is about
The age of most ancient geological formation is estimated by
Out of diffuse porous and ring porous woods, which is correct?
The de Broglie wave corresponding to a particle of mass m and velocity v has a wavelength associated with it
If the amplitude of sound is doubled and the frequency reduced to one fourth, the intensity of sound at the same point will be
Generative cell was destroyed by laser but a normal pollen tube was still formed because
The size of chlorophyll molecule is
Plasmamembrane is made of
The compound which reacts fastest with Lucas reagent is (at room temperature)
The maximum number of electrons in a subshell is given by the expression
Egg is liberated from ovary in
Lymph differs from blood in possessing
Haversian canals occur in
Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes
In C4 plants, Calvin cycle operates in