Questions asked by Jaspreet Kaur
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How does Taenia solium perform self fertilization during sexual reproduction even when protandrous condition exists?

What is the total number of #AlF_3# molecules in a sample of #AlF_3# containing #3.01 * 10^(23)# fluoride ions ?

5.85 g of NaCl is dissolved in 1 L of pure water . How do you calculate the number of ions in 1mL of this solution?

Ratio of Cp and Cv of a gas 'X' is 1.4. Calculate the number of atoms of the gas present in 11.2 liters of it at NTP?

Alveoli are lined by squamous epithelial cell layer. Epithelial cells are essentially avascular. Thus, how does the blood in the body get oxygenated via alveoli?

What causes ringworm ? What's it's span in the host body ?

Why viroids and virusoids do not cause diseases in animals ?

The degree of dissociation of #"Ca"("NO"_3)_2# in a dilute aqueous solution containing 14g of the salt per 200 g of water at #100^@"C"# is 70% .If the vapour pressure of water is 760 mmHg , what will be the vapour pressure of the solution ?

A sample of drinking water severely contaminated with chloroform , CHCl3 ,is supposed to be carcinogenic in nature . The level of combination was 15 ppm (by mass) .What is the molality of chloroform in the water sample ?

Equimolal solutions of #"KCl"# and compound #"X"# in #"H"_2"O"# show depressions of freezing pts. in a #4:1# ratio . Assuming #"KCl"# to be ionized completely , the compound #"X"# must ?

For the reactions,
H2(g)+Cl2(g)>2HCl(g)+xKJ
H2(g)+Cl2(g)>2HCl(l)+yKJ
Which one of the following statement is correct?
A)x>y B)x<y C)x=y D)more data required

9.2g of dinitrogen tetroxide is taken in a closed 1L vessel and heated till the following equilibrium is reached. At equilibrium, #50%# of the #"N"_2"O"_4(g)# is dissociated. What is the equilibrium constant (in mol/liter) ?

A vessel at 1000K contains #"CO"_2# with a pressure of 0.5atm. Some of the #"CO"_2# is converted into #"CO"# on the addition of graphite. If the total pressure at equilibrium is 0.8atm, the value of #K_p# is?

In the Haber process, #"30 L"# of #"H"_2# and #"30 L"# of #"N"_2# were used for a reaction which yielded only #50%# of the expected product. What will be the composition of gaseous mixture under these condition in the end?

When an important predator starfish 'Piasater' was experimentally removed from an enclosed idertidal area of communities of the American Pacific coast, it resulted in extinction of +10 species of invertebrates with in a year? why?

Weight of 50 atoms of an element is 3000 a.m.u. Calculate the number of atoms in 240 grams of element?

In the preparation of CaO from CaCO3 using the equilibrium,
CaCO3(s) <> CaO(s) + CO2(g)
Log Kp = 7.282 8500/T
For complete decomposition of CaCO3, the temperature in Celsius is ?
A) 1167
B) 894
C) 8500
D) 850

CsBr crystallises in a bodycentred cubic (bcc) lattice. The unit cell lengt is 436.6pm. Given that the atomic mass of Cs= 133u and that of Br=80u. What will be the density of CsBr?
a) 0.425g/cm^3
b) 8.25g/cm^3
c) 42.5g/cm^3
d) 4.25g/cm^3

What will be the pH of the solution that results from the addition of 20mL of 0.01M Ca(OH)2 to 30mL of 0.01M HCl?

A copper rod is suspended in a nonhomogeneous magnetic field region. How will it align itself in equilibrium?

A railway track running NS has 2 parallel rails 1m apart. If the horizontal component of magnetic field at that place is 0.3*10^4 and angle of dip is 60°, then what'll be the value of induced emf b/w the rails when a train passes at a speed of 90km/ h?

A 15g ball is shot from a spring gun whose spring has force constant of 600N/m. The spring is compressed by 5cm. What is the greatest possible horizontal range of the ball for this compression is (take g=10m/s^2)?

How to calculate oxidation number of Iron in ferriferrocyanide Fe4[Fe(CN)6]3 ?

How should the diameter of the wire used be chosen so to minimize the heat dissipated in windings ? Check the details in question.

How many litres of liquid CCl4 ( d=1.5 g/cc) must be measured out to contain 10^25 CCl4 molecules?