Questions asked by Kashish

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• In which of the following options is magnetic quantum number (m) = zero for all the three orbitals in a given option? A) 2s, 2px, 3dxy B) 3s, 2pz, 3dz^2 C) 2s, 2pz, 3dx^2 - y^2 D) 3s, 3px, 3dyz
  
• In which option is the highest velocity of electron?
  
• A projectile is thrown up with the initial speed u, making an angle theta (theta > 45 deg) with the horizontal. What is the time, just after which, it will be moving perpendicular to its initial direction of motion?
  
• Four balls A, B, C and D are projected with the same speed making angles of 20 deg, 30 deg, 45 deg and 80 deg with the horizontal. Which ball will strike the ground at nearest point?
  
• If a point moves in straight line in such a manner that its acceleration is proportional to its speed (a ∝ v) , what is the relation between distance covered and speed?
  
• A particle starts to move in a circle of radius 1 m with an angular acceleration 1 rad/s^2. If the mass of the particle is 2 kg and it started from rest and moved on a horizontal surface, what is the total force acting on it at t=2 seconds?
  
• Are all combination reactions also redox reactions?
  
• Oxidation numbers of A, B and C are +2, +5 and -2 respectively. What could be the possible formula?
  
• Why is the hybridisation of N in borazine sp2 ?
  
• Why is work done by gravitational force of sun during motion of a planet from perihelion to aphelion negative?
  
• Why does the pulmonary vein not have valves?
  
• Consider two insulated chambers (A,B) of same volume connected by a closed knob, S. One mole of perfect gas is confined in chamber A. What is the change in entropy of gas when knob S is opened? ( R= 8.31 )
  
• In what order do electrons get removed for the formation of an ion?
  
• What is the formula of pressure according to kinetic theory in terms of mass density ?
  
• Are the seeds of sunflower exalbuminous or albuminous?
  
• What is the difference between apomixis, agamospermy and apospory?
  
• How does polyteny occur?
  
• Why does a Drosophila have only 4 linkage groups when 8 chromosomes are present?
  
• Ice crystallises in a hexagonal lattice having the volume of unit cell as 132 × 10–24 cm3. If density is 0.92 g cm–3 at a given temperature, then what is the number of H2O molecules per unit cell?
  
• Is it possible to have a retroperitoneal uterus?
  
• How to differentiate equation x^2 = y^3 with respect to t?
  
• How is the number of electric field lines emerging out of a conductor equal to flux?
  
• What do the following statements mean? [related to evolution]
  
• Why is there no option to report answers in Socratic?
  
• How is PCR used to detect HIV virus?
  
• Electrons with de-Broglie wavelength λ fall on the target in an X-ray tube. What is the cut-off wavelength λo of the emitted X-rays?
  
• What is the order of reactivity towards electrophilic aromatic substitution of fluorobenzene, chlorobenzene and iodobenzene?
  
• What is the order of increasing acidic strength of the following compounds?
  
• What is the correct IUPAC name of this compound?
  
• A particle moves in x-y plane according to rule x = a sin ωt and y = a cosωt. What kind of path does the particle follow ?
  
• How does the size of metal atom and the oxidation state of the metal ion affect the CFSE ?
  
• How many isomers does [Co(en)NH3Cl2]Cl have?
  
• A point moves in X−Y plane according to X=a sin(wt) and Y=a (1−cos(wt)). What path will the particle follow?
  
• What is the formula for speed of pendulum at any point?