Recent questions

Which of the following is the harmful effect of cutting forest?
A)-Lack of rainfall
B)-Climate change
C)-Both A and B
D)-None of these

Which of the following electromagnetic wave play an important role in maintaining the earths warmth or average temperature through the greenhouse effect?
A)-Visible rays
B)-Infrared waves
C)-Gamma rays
D)-Ultraviolet rays

In each of the following questions, select the pair in which the numbers are similarly related as in the given pair.

The total volume of gases evolved at STP at cathode during the entire electrolysis is:
A)-58.49 ml
B)-48.23 ml
C)-60.35 ml
D)-35.58 ml

The main product of photosynthesis is:
A)-Glucose
B)-Oxygen
C)-Carbon dioxide
D)-Carbon monoxide

The secondary structure of protein is mainly governed by
A)-hydrogen bonds
B)-covalent bonds
C)-hydorphobic bonds
D)-disulphide bonds

The noble gases which form clathrate compounds:

Microwaves are heat waves which is used to heat up food in ovens.

The ultra high frequency band of radiowaves in electromagnetic waves is used as in
A)-Television waves
B)-Cellular phone communication
C)-Commercial FM radio
D)-Both (b) and (c)

Column I gives three physical quantities. Select the appropriate units for these from choices given in column II. Some of the physical quantities may have more than one choice.

The reciprocal of impedance is called
A)-reactance
B)-admittance
C)-inductance
D)-susceptance

A saturated solution is a metastable solution whose concentration:
A)-Is equal to the solubility of the substance in solvent
B)-Is less than the solubility
C)-Exceeds the solubility
D)-Continuously changes

To form a saturated solution of salt one must:
A)-cool slowly
B)-cool rapidly
C)-add some salt to cold solution
D)-use a clear vessel

The formula of chromic acid is:
A)-(HCrO_3)
B)-(HCrO_4)
C)-(H_2CrO_3)
D)-(H_2CrO_4)

An optical fiber uses the principle of
A)-diffraction of light
B)-absorption of light
C)-high transmission coefficient of the fiber material
D)-total internal reflection

In the presence of crystals of solute, a supersaturated solution is_____
A)-not stable
B)-stable
C)-cannot be made
D)-none of above

The formula of the deep red liquid formed on heating potassium dichromate with (KCl) in conc. (H_2SO_4) is:
A)-(CrCl_3)
B)-(CrO_2Cl_2)
C)-(CrO_3)
D)-(Cr_2(SO_4)_3)

Metal alloys are impure substances of metals so when hammered, they:
A)-form ions
B)-convert into thin sheets
C)-show ductility
D)-break into pieces

Most lustrous substance is: | Chemistry Questions
A)-diamond
B)-gold
C)-silver
D)-iodine

Refer the above reaction sequence.