bulbul11sharma

When a beam of white rays is dispersed by a prism which colour will be refracted to a larger extent?

Which of the following works as the basis of conservation of liner ____

What is the name of the force with which earth pulls everything towards itself?

At which stage does the embryo start to obtain nutrients through placental exchange?

A. Copulation            B. Fertilization 

C. Implantation         D.Ovulation

The data in the table below indicate the presence of specific reproductive hormones in blood samples

taken from three individuals. An X in the hormone column indicates a positive lab test for the

appropriate levels necessary for normal reproductive functioning in that individual.

Which processes could occur in individual 3?

A. Production of eggs and embryonic development 

B. Production of sperm only 

C. Production of sperm and production of eggs 

D. Production of eggs only

4.

What cell is represented by C?

A.oocyte  B.lymphocyte  C.chondrocyte  D.spermatocyte  5.

What hormone is A?

A.oocyte  B.oogenesis  C.spermatogenesis  D.testosterone 

Which element is excreted through human sweat?

Which chemical was used earlier for giving anesthesia to patients?

Which heavy metal causes Itai Itai disease?

What is the other name of thiamine?

What do you mean by photoelectric effect?

What do you mean by a buffer solution?

What kind of thermometer is used to determine the depression of freezing point?

Give the name of the radioactive isotope of hydrogen?

What is molarity?

The absence of cobalt in minute quantities in human body causes what?

What are isobars?

A. a muon (a subatomic paticle mass of 1.884 x 10^-25 g)traveling at 305 m/s in nm.

B. an electron (me=9.10939 x 10^-28 g) moving at 4.20 x 10^6 m/sin an electron microscope in nm.

C. an 79 kg athlete running a 4-minute mile in nm.

D. Earth (mass=5.8 x 10^27 g) moving through space at 2.9 x 10^4m/s in nm.

What is the definition of electromagnetic energy?

The vinegar is a solution of

(A) 5% acetic acid in water

(B) 10% acetic acid in water

(C) 15% acetic acid in water

(D) 50% acetic acid in water

How is alkanol formed ? 

What do contractile vacuoles do?

Solutions were prepared to contain 100 grams of each of the following compounds in 1000 g of H2O. Which compound would give the lowest freezing point?
 A. CO2                      C. KBr
 B. C6H12O6               D. MgCl2

For the reaction,
 N2O4(g) ⇄ nitrogen dioxide (g)
   At 25oC, the equilibrium concentrations of nitrogen dioxide and N2O4 are 0.0204 M and 0.0898 M, respectively. What is the Kc of the reaction at the said temperature? 

Predict the direction of the reaction that will be favored by the system below when the equilibrium is 
disturbed by the factors given.
nitrogen monoxide (g) + carbon monoxide (g) + heat ⇄ nitrogen gas + carbon dioxide (g) 

 Write:

A if forward (left to right)
B if reverse (right to left)
C no effect
 
 Write only the CAPITAL letter of your choice. 
11. The amount of nitrogen gas is doubled.
12. The system is cooled.
13. The total pressure is decreased.
14. Inhibitors are added.
15. Some carbon monoxide are removed in the reaction mixture.

4 Fe (s) + 3 O2 (g) → 2 Fe2O3 (s)

How many moles of iron will react if 12 moles of oxygen gas reacts?

At 30 oC, pure benzene has a vapor pressure of 121.8 mmHg. Dissolving 15.0 g of a non-volatile solute, R , in 250 g of benzene produced a solution having a vapor pressure of 120.2 mmHg. Determine the approximate MW of solute R

Order   the   molecules   by   decreasing   strength   of   intermolecular   forces.   (Starting   with   the   strongest). HF  H 2 NBr 3 

Suppose T is dominant to t. T confers tall plant height. In a cross between a parent of unknown genotype and a Tt individual, 50% of the progeny are tall. What is the genotype of the unknown parent?

a. TT

b. Tt

c. impossible to tell

d. tt

For the formation of carbon dioxide from graphite and oxygen gas

C(s)+O2(g)→CO2(g)

ΔrH°=-393.51 kJ mol-1 and ΔrS°=+3.07 J mol-1 K-1.

Is this process

Spontaneous at all temperatures

Spontaneous at low temperatures but not spontaneous at high temperatures

Not spontaneous at low temperatures but spontaneous at high temperatures

Not spontaneous at any temperature

4.40 g of CO₂ (g) and 1.40 g of CO (g) occupy a 3.00 L flask at 300.0 ^oK. The total pressure of this gas mixture is 1.23 atm. What are the partial pressures of each gas?