Welcome to your CHSL 2021 ALL Chemistry Questions
When do electrons move for the flow of charges in a conducting metallic wire?
Which enzyme is responsible for the oxidation reaction that occurs in some foods, mostly fruits and vegetables, that turns the food brown?
Titanium dioxide, which is used as a white pigment in products such as toothpaste, is derived from which mineral?
Which of the following is a soft metal that ignites in air and reacts violently with water and has atomic number 37 in the periodic table?
Lemon juice contains ________ which when mixed with baking soda reacts to form carbon dioxide and sodium citrate causing the liquid to fizz and bubble.
What do you call a base that dissolves in water?
Who published the book 'Method de nomenclature (System of Chemical Nomenclature)' along with Claude Berthollet and others that determined the modern method of naming substances?
Which of the following metals having atomic number 3 is a soft, silvery metal with very low density that reacts vigorously with water and corrodes quickly in air?
Which metal sulphate, composed of potassium, aluminium, and sulphate ions in the ratio 1 : 1 : 2, plays a role as a flame retardant, a mordant and an astringent?
Which chemical compound, with the chemical formula CH3CH2Cl, is used as a blowing agent in foamed plastics?
Where is sodium located on the periodic table?
In which year did Dmitri Mendeleev and Lothar Meyer individually come up with their own periodic law and proposed that on arranging elements in the increasing order of their atomic weights, similarities appear in physical and chemical properties at regular intervals?
Identify the chemical structure for potassium hydroxide.
What is the common name of CHCl3?
Which group was given the name ‘paraffin’ earlier?
Muriatic acid is another name of which compound used in the production of chlorides, fertilisers, and dyes, in electroplating, and in the photographic, textile and rubber industries?
Who observed that in a mixture of non-reactive gases, the total gas pressure is equal to the sum of the partial pressures of the individual gases?
What happens when an acid or a base is mixed with water?
The NBFID bill was passed in Rajya Sabha on 25 March 2021, by which NBFID will be set up as a corporate body with an authorised share capital of ________ lakh crore rupees.
Why are the outermost electrons lost easily down the group?
The systematic name of which compound is nitrogen trihydride that is widely used in many industrial processes, and as a fertiliser and refrigerant?
Isopentane, also called ________, is a branched-chain saturated hydrocarbon with the chemical formula C₅H₁₂.
Identify the word that means vertical columns of Periodic Table.
The name of which element is derived from an Anglo-Saxon word and its symbol comes from the Latin word ‘Aurum’?
Who showed that heating silver cyanide (an inorganic compound) with ammonium chloride (another inorganic compound) produced urea without the aid of any living organism or part of a living organism, in 1828?
Which functional group compound is obtained by the reaction of an oxoacid with a hydroxyl compound, such as alcohol or phenol?
Which of the following is a white, crystalline organic acid often used as an acidulant in grape and lime-flavoured drinks, gelatine desserts, jams, jellies, and hard sour confectionery?
By what method do dry ice, mothballs, iodine crystals and compounds containing zinc turn from solid to gaseous state without becoming a liquid?
Who synthesised acetic acid for the first time?
Which cycle shows the movement of water?
Which element’s symbol is derived from the Greek name hydrargyrum, meaning ‘liquid silver’ – indicating its shiny surface?
Aqua regia is an acidic, corrosive and oxidative mixture consisting of ________ volume/volumes of concentrated hydrochloric acid and one volume of concentrated nitric acid, often used to dissolve gold and platinum.
Which chemical compound is composed of magnesium, sulphur and oxygen and is commonly used in detox bath to relax muscles and relieve pain in the shoulders, neck, back and scalp?
When did Ernest Rutherford publish the results of the gold-foil experiment, which showed that scattering is caused by a rigid, dense core at the centre of the atom - the nucleus?
What is the position of non-metals in the periodic table?
Which of the following is an organic compound with the formula C6H4Cl2 that is used as a fumigant insecticide to control cloth moths?
Which element of Group 13 of the periodic table liquefies just above room temperature?
By what metabolic process in the kitchen can you make food like curd, paneer and sauerkraut?
Identify the method that is NOT used to purify organic compounds.
Why does the effective nuclear charge experienced by valence electrons decrease down the group?
Who found out the relationship between the current I flowing in a metallic wire and the potential difference across its terminals?
What is the common name of C6H6?
According to Mendeleev's periodic table, which unknown element of group III had an atomic mass of 68 that was later replaced by gallium?
Which compound has the chemical formula CHCl3 whose melting point is 209 K?
Identify the group of the periodic table to which cobalt belongs.
In the electronic configuration of an atom, What does ‘n’ signify in the formula 2n2?
Identify the INCORRECT pair with respect to the substances and their specific heat capacity (J kg-1K-1) at room temperature and atmospheric pressure.
Which element replaced eka aluminium according to the Mendeleev’s periodic table?
In the format of the IUPAC name of the organic compound, the term ‘Root’ is used to represent:
Identify the group of the periodic table to which iron belongs.
Identify the structural formula for ethene.
Which inorganic compound is used to manufacture soap, rayon, paper, explosives, dyes, and petroleum products?
Identify the word that means horizontal rows in periodic table.
Which group is on the second column from the right in the periodic table and contains fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and tennessine (Ts)?
Find the correct chemical formula of nitromethane
Which French chemist summarised his experiment in 1806, and proved that the mass ratio of elements in a chemical compound is always the same, regardless of the source of the compound?
Who recognised the elements carbon, hydrogen and oxygen and opposed the phlogiston theory by discovering the role of oxygen in combustion and respiration?
Which of the following groupsconsists of elements that are non-reactive, monoatomic elements with extremely low boiling points?
Which of the following artificial colouring agents is used in dietary supplements, sauces, soups and broths, bakery, dairy fats and oils, seafood, condiments, breath fresheners, desserts, convenience foods and beverages?
The particles of which metal on heating to the boiling point of 357°C go from liquid state to gas state?
Identify the chemical name for Ge.
What test is used where the elements present in the compound are converted from covalent form into the ionic form by fusing the compound with sodium metal?
In which state of matter is the kinetic energy of molecules greater than the forces of attraction between them, such that they are so far apart and move independently of each other?
Who was awarded the Society's Royal Medal for his atomic theory in 1826?
