List of practice Questions

During smelting an additional substance is added which combines with impurities to form a fusible product. It is known as

During non-cyclic photophosphorylation, electrons are continuously lost from the reaction centre of $PS II$. Which source is used to replace these electrons?

During pachytene stage of meiosis, the chromosomes appear

During isolation of genetic material, the chemical used to precipitate out the purified $DNA$ is

During microsporogenesis, meiosis occurs in

During $N_2$ fixation, reduction of one molecule of nitrogen into $2$ molecules of $NH_3$ consumes__ molecules of $ATP$.

During binary fission in Amoeba which of the following organelles is duplicated?

During electrolysis of NaOH

During interference of light, energy is:

During acetylation of glucose it needs $x$ moles of acetic anhydride. The value of $x$ would be

During addition polymerisation of ethene molecules, the initiator like benzoyl peroxide, acetyl peroxide, tert-butyl peroxide, etc. are added. Their function is to

During an artificial transmutation the nucleus emits

Due to Frankel defect, the density of ionic solids

Duplication of DNA occurs during which stage of the cell cycle?

Droplets of a liquid are generally more spherical in shape than large drops of the same liquid because

Dry bleach is done by

Dry powder fire extinguisher contains

Doppler shift in frequency does not depend upon

Double convex lenses are to be manufactured from a glass of refractive index $1.55$, with both faces of same radius of curvature. What is the radius of curvature required if the focal length is to be $20\, cm$?

Dow's reaction involves

Dodo, passenger pigeon and Steller's sea cow became extinct in the last $500$ years due to

Domain of $cos^{-1}\, [x]$ is

Domestic cooking gas consists of mostly

Domestic waste mostly constitutes

Diuresis is the condition in which