Description : The combination of two or more ele- ments. is called?
Last Answer : Compounds
Description : The number of naturally occurring ele- ments?
Last Answer : 92
Description : The scientist who gave symbols for ele- ments on the basis of their names?
Last Answer : John .J. Berzelius
Description : The scientist who proved that the ele- ments are made up of atoms?
Last Answer : John Dalton
Description : Which carat of gold is used to make orna- ments?
Last Answer : 22 carat
Description : Which of the following state-ments is correct about the President of India? (1) Addresses first session of Parliament after each General Election (2) Addresses first session of Parliament at the beginning of each year (3) Addresses every session of Parliament (4) Never addresses Parliament
Last Answer : (1) Addresses first session of Parliament after each General Election Explanation: Article 87 of the constitution provides two instances when the President specially addresses both Houses of Parliament. The ... houses at beginning of the first session of each year (usually the budget session).
Description : Agricultural income tax is a source of revenue to (1) Central Government (2) State Government (3) Local Administration (4) Centre and State Govern ments
Last Answer : State Government
Description : An electron is moving with a velocity of `10^(7) m s^(-1)`. Find its energy in electron volts. (Mass of electron `=9.1xx10^(-31) kg` and charge of ele
Last Answer : An electron is moving with a velocity of `10^(7) m s^(-1)`. Find its energy in electron volts. (Mass ... ` and charge of electron `=1.6xx10^(-19) C`)
Description : Second most chemically reactive ele- ment?
Last Answer : Chlorine
Description : Assertion `:-` When filtrate pass through descending limb of loop of Henle it becomes concentrate. Reason` :-` Descending limb allows transport of ele
Last Answer : Assertion `:-` When filtrate pass through descending limb of loop of Henle it becomes concentrate. Reason ... D. If both Assertion & Reason are false.
Description : (A) Inductive and electromeric effects require polar nature in the molecule. (R) Polar nature in inductive effect is a must but not necessarily in ele
Last Answer : (A) Inductive and electromeric effects require polar nature in the molecule. (R) Polar nature in inductive ... (A) is incorrect but (R) is correct.
Description : In the extraction of aluminium metal , one of the process is summarised as follows : Which of the following entrie correctly summarises reagents , ele
Last Answer : In the extraction of aluminium metal , one of the process is summarised as follows : Which of the following ... ), Na_(3)AlF_(6) , "Cathode"):}`
Description : Out of two equilibrium curves, first one lies above the diagonal and the second lies below the diagonal in the x-y plot. It means that separation by distillation is (A) Not possible in the second ... (C) More readily done in the second case compared to first one (D) None of these
Last Answer : (C) More readily done in the second case compared to first one
Description : An absorber separated two chemicals. How do you make one chemical go through one specific pipeline and another chemical go through another one to get to their intended destinations after separation?
Last Answer : For what I'm working on there is going to be two chemicals in one absorber tower but both are going to have to go separate ways, and I was wondering how do you control which pipes the chemicals take and how do they get in there! I hope somebody can answer my question!
Description : Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is ... reflux in case of distillation operation requires infinite number of plates for a binary system separation
Last Answer : (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion
Description : __________ is an ore concentrating metallurgical process involving a chemical change. (A) Electromagnetic separation (B) Froth floatation (C) Roasting (D) None of these
Last Answer : (C) Roasting
Description : How can separation of chiral chemicals affect the chemical and/or pharmaceutical industries?
Last Answer : This enantiomers (left or right [R] oriented) versions of the same compound can have very different properties; this development has been significant particularly in the pharmaceutical industry. For example ... By chiral separation, the most of the side effects of Seldane were avoided in Allegra.
Description : Pick out the wrong statement. (A) Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water (B) Apatite is the principal material present in ... fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound fo
Last Answer : (C) Urea is more hygroscopic than ammonium nitrate
Description : Separation of materials into products based on the difference of theirsizes is called (A) Sizing (B) Sorting (C) Classification (D) Flocculation
Last Answer : (A) Sizing
Description : Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called (A) Classification (B) Sedimentation (C) Clarification (D) Decantation
Last Answer : (B) Sedimentation
Last Answer : Green plants convert solar energy into chemical energy in the process of photosynthesis and first bind ATP, NADPH in organic compounds.