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Inorganic Chemistry

Description: This test is based on certain topics from inorganic chemistry.
Number of Questions: 25
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Tags: Ions atoms flame test alloys mettallugy etc Alkali Metals Alkali Metals (Group-1) Alkaline Earth Metals
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Vitamins help our body to grow and develop normally. The bioavailable form of vitamin C is

  1. sodium acetate

  2. sodium aluminate

  3. sodium ascorbate

  4. sodium benzoate


Correct Option: C
Explanation:

Sodium ascorbate is a more bioavailable form of vitamin C that is an alternative to taking ascorbic acid as a supplement. The molecular formula of this chemical compound is C6H7NaO6. As the sodium salt of ascorbic acid (vitamin C), it is known as a mineral ascorbate.

The sodium salt used for manganese testing is

  1. sodium bis(trimethylsilyl)amide

  2. sodium bismuthate

  3. sodium bisulphate

  4. sodium bisulphite


Correct Option: B
Explanation:

Sodium bismuthate is a slightly hygroscopic chemical compound with the chemical formula of NaBiO3. It is an oxidizer. It is not soluble in cold water. It also decomposes when placed in acids. It is one of the few sodium compounds that do not dissolve in water. Sodium bismuthate is commercially used in manganese testing.

The sodium salt used in instant noodles is

  1. disodium guanylate

  2. disodium hydrogen phosphite

  3. disodium inosinate

  4. disodium octaborate tetrahydrate


Correct Option: C
Explanation:

Disodium inosinate (E631) is the disodium salt of inosinic acid with the chemical formula C10H11N4Na2O8P. It is used as a food additive and often found in instant noodles, potato chips, and variety of other snacks.

Hyperphosphatemia is a disease with high levels of inorganic phosphate in the blood.The calcium salt used to lower blood phosphate level is

  1. calcium acetate

  2. calcium arsenate

  3. calcium bisulphite

  4. calcium benzoate


Correct Option: A
Explanation:

The chemical compound calcium acetate is the calcium salt of acetic acid. It has the formula Ca(C2H3O2)2. In kidney disease, blood levels of phosphate may rise (called hyperphosphatemia) leading to bone problems. Calcium acetate binds phosphate in the diet to lower blood phosphate levels. Calcium acetate is used as a food additive, as a stabilizer, buffer and sequestrant, mainly in candy products. 

A dough conditioner strengthens the texture or otherwise improves it in some way. Among the following ----------------------- is used as a dough conditioner.

  1. calcium iodate

  2. calcium lactate

  3. calcium inosinate

  4. calcium nitrate


Correct Option: A
Explanation:

Calcium iodate is a compound of calcium and iodate anion. Its formula is Ca(IO3)2. It is used as a dough conditioner. Calcium iodate is an oxidant added to lotions and ointments as an antiseptic and deodorant. It may be formed by the anodic oxidation of calcium iodide.

Animal cell membrane is a flexible lipid bilayer. Among the following, -------------- is a vital component in the structure of cell membranes in the human body.

  1. calcium 2-aminoethylphosphate

  2. calcium-alpha-ketoglutarate

  3. calcium β-hydroxy-β-methylbutyrate

  4. dodecacalcium hepta-aluminate


Correct Option: A
Explanation:

Calcium 2-aminoethylphosphate (Ca-AEP or Ca-2AEP) is a vital component in the structure of cell membranes in the human body. It is the calcium salt of phosphorylethanolamine. Ca-AEP has been shown to help maintain cell membrane integrity and improve cellular functions.

Sorel cement is unsuitable for construction applications. Among the following -------------------- can form Sorel cement.

  1. magnesium aluminide

  2. magnesium chloride

  3. magnesium hydride

  4. magnesium fluoride


Correct Option: B
Explanation:

Magnesium chloride is used for a variety of other applications besides the production of magnesium: the manufacture of textiles, paper, fireproofing agents, cements and refrigeration brine, and dust and erosion control. Mixed with hydrated magnesium oxide, magnesium chloride forms a hard material called Sorel cement.

Apples turn brown quickly. Which of the following calcium salts is used to keep apples fresh?

  1. Calcium ascorbate

  2. Calcium borate

  3. Calcium bromate

  4. Calcium chlorate


Correct Option: A
Explanation:

Calcium ascorbate is a compound with the molecular formula CaC12H14O12. It is the calcium salt of ascorbic acid, one of the mineral ascorbates. As a food additive, it has the E number E302. Among its many uses is to keep apples fresh, so they do not turn brown quickly.

The magnesium compound used in libraries for preserving books is

  1. magnesium hydroxide

  2. magnesium nitride

  3. magnesium iodide

  4. magnesium oxide


Correct Option: D
Explanation:

Magnesium oxide is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium. It has an empirical formula of MgO. It is relatively poor dessicant, but because it neutralizes sulphur oxide acids created by oxidation of Kraft-processed papers, it is used by many libraries for preserving books.

A flocculant is a soluble material that is added to a glaze to increase the viscosity and increase the time it takes for the glaze to settle. Among the following ------------------ is used as a flocculant, in water and sewage treatment.

  1. calcium gluconate

  2. calcium hexaboride

  3. calcium hydride

  4. calcium hydroxide


Correct Option: D
Explanation:

Calcium hydroxide, traditionally called slaked lime, is an inorganic compound with the chemical formula Ca(OH)2. It is a colourless crystal or white powder and is obtained when calcium oxide is mixed with water. One significant application of calcium hydroxide is as a flocculant, in water and sewage treatment.

Pesticides are used for controlling & destroying a particular target pest. Among the following sodium salts which one is used as a pesticide?

  1. Sodium azide

  2. Sodium arsenite

  3. Sodium amide

  4. Sodium chlorite


Correct Option: B
Explanation:

Sodium arsenite is a compound with formula NaAsO2. It is the sodium salt of arsenous acid. It is a crystalline solid consisting of sodium cations, Na+ and catena-arsenite anions, [AsO2]nn, which are infinite -O-As(=O)- chains, similar in structure to selenium dioxide, SeO2. It is a pesticide.

Saline laxatives are oral laxatives that help to encourage bowel movements. The magnesium salt used medicinally as a saline laxative is

  1. magnesium benzoate

  2. magnesium carbonate

  3. magnesium citrate

  4. magnesium nitrate


Correct Option: C
Explanation:

Magnesium citrate, a magnesium salt of citric acid, is a chemical agent used medicinally as a saline laxative and to completely empty the bowel prior to a major surgery or colonoscopy.

A drying agent removes water from an organic compound that is in solution. Among the following magnesium compounds ------------------- is used as a drying agent.

  1. trimagnesium citrate

  2. monomagnesium phosphate

  3. magnesium gluconate

  4. magnesium sulphate


Correct Option: D
Explanation:

Magnesium sulphate is a chemical compound containing magnesium, sulphur and oxygen. It is often encountered as the heptahydrate epsomite (MgSO4·7H2O), commonly called Epsom salt. Anhydrous magnesium sulphate is used as a drying agent.

Antioxidants are molecules which can safely interact with free radicals and terminate the chain reaction before vital molecules are damaged. Which among the following calcium salts acts as an antioxidant structurally related to vitamin C?

  1. Calcium formate

  2. Calcium erythorbate

  3. Calcium diglutamate

  4. Calcium citrate malate


Correct Option: B
Explanation:

Calcium erythorbate is a food additive. Chemically, it is the calcium salt of erythorbic acid. As an antioxidant structurally related to vitamin C, it helps to improve flavour stability and prevents the formation of carcinogenic nitrosamines.

---------------------- salt of magnesium boosts cognitive abilities of rats.

  1. Magnesium L-threonate

  2. Magnesium salicylate

  3. Magnesium stearate

  4. Magnesium trisilicate


Correct Option: A
Explanation:

Magnesium L-threonate is a magnesium salt of L-threonic acid having the formula Mg(C4H7O5)2. Researchers have found that magnesium L-threonate administered to rats significantly boosts their cognitive abilities, and suggest that the same effect may occur in humans, although this remains to be tested.

Neuroses is a mental and emotional disorder that affects only part of the personality.The calcium compound found in neuroses medication is

  1. calcium bromide

  2. calcium carbide

  3. calcium chloride

  4. calcium cyanamide


Correct Option: A
Explanation:

Calcium bromide is the calcium salt of hydrobromic acid with the chemical formula of CaBr2. In its solid state, it is a white powder. CaBr2 can be found in drilling fluids, neuroses medication, freezing mixtures, food preservatives, photography and fire retardants.

Among the following ------------------- is used to preserve sparkling drinks & soft drinks.

  1. potassium acetate

  2. potassium aluminate

  3. potassium ascorbate

  4. potassium benzoate


Correct Option: D
Explanation:

Potassium benzoate, the potassium salt of benzoic acid, is a food preservative that inhibits the growth of mold, yeast and some bacteria. It works best in low-pH products, below 4.5, where it exists as benzoic acid. Acidic foods and beverages such as fruit juice (citric acid), sparkling drinks (carbonic acid), soft drinks (phosphoric acid), and pickles (vinegar) may be preserved with potassium benzoate.

Nessler's reagent gives yellow or brown colour or precipitate when added to solutions containing ammonia or ammonium ions. Among the following which one is mainly used as nessler's reagent ?

  1. Potassium tetrachloroplatinate(II)

  2. Potassium tetraiodomercurate(II)

  3. Potassium peroxochromate

  4. Potassium tetraphenylborate


Correct Option: B
Explanation:

Potassium tetraiodomercurate(II) is an inorganic compound containing potassium cations and the tetraiodomercurate(II) complex anion. It is mainly used as nessler's reagent, a 0.09 mol/L solution of potassium tetraiodomercurate(II) (K2[HgI4]) in 2.5 mol/L potassium hydroxide, used to detect ammonia.

Nitrification is the process by which ammonia is converted into nitrites and then nitrates. The magnesium salt acting as a nitrification inhibitor in soil is

  1. potassium bromide

  2. potassium bifluoride

  3. potassium azide

  4. potassium amide


Correct Option: C
Explanation:

Potassium azide is a chemical compound having formula KN3. It is the potassium salt of hydrazoic acid and crystallises in a tetragonal structure. 

The potassium salt used for the determination of potassium by gravimetry is

  1. potassium hydrogenoxalate

  2. potassium hexafluorophosphate

  3. potassium hexafluoronickelate

  4. potassium hexachloroplatinate


Correct Option: D
Explanation:

Potassium hexachloroplatinate, an inorganic compound, is an example of a comparatively insoluble potassium salt.The precipitation of this compound from solutions of hexachloroplatinic acid is used for the determination of potassium by gravimetry.

Aldosterone is a hormone released by the adrenal glands. The potassium salt acting as an aldosterone antagonist is

  1. potassium chlorate

  2. potassium carbonate

  3. potassium canrenoate

  4. potassium bromate


Correct Option: C
Explanation:

Potassium canrenoate is an aldosterone antagonist. Like spironolactone, it is a pro drug, which is metabolised to canrenone in the body.

Which of the following is a byproduct of wine making?

  1. Potassium bitartrate

  2. Potassium hydrogen sulphite

  3. Potassium bisulphate

  4. Potassium bicarbonate


Correct Option: A
Explanation:

Potassium bitartrate, also known as potassium hydrogen tartrate, has formula KC4H5O6. It is a byproduct of winemaking. In cooking, it is known as cream of tartar. It is a potassium acid salt of tartaric acid, a carboxylic acid (the other being potassium tartrate).

Which of the following is involved with sodium in maintaining the body's acid-base balance?

  1. Potassium fulminate

  2. Potassium formate

  3. potassium gluconate

  4. Potassium iodate


Correct Option: C
Explanation:

Potassium gluconate is a mineral supplement and sequestrant. Potassium gluconate is a loosely bound salt of potassium and gluconic acid. Potassium is essential to life. It is involved with sodium in maintaining the body's acid-base balance and promoting physiological and metabolic processes.

Among the following --------------------- is used for frequency doubling diode pumped solid-state lasers.

  1. potassium titanyl phosphate

  2. potassium thiocyanate

  3. potassium hydrogenacetylenedicarboxylate

  4. deuterated potassium dihydrogen phosphate


Correct Option: A
Explanation:

Potassium titanyl phosphate (KTiOPO4) or KTP is a non-linear optical material which is commonly used for frequency doubling diode pumped solid-state lasers such as Nd:YAG and other neodymium-doped lasers. The material has a relatively high optical damage threshold (~15 J/cm²), a great optical non linearity and excellent thermal stability in theory.

A carcinogen is a cancer causing agent. Among the following --------------- is a carcinogen.

  1. potassium chromate

  2. potassium citrate

  3. potassium cyanate

  4. potassium ferrate


Correct Option: A
Explanation:

Potassium chromate (K2CrO4) is a yellow chemical indicator used for identifying concentrations of chloride ions in a salt solution with silver nitrate. It is a carcinogen and can cause cancer on inhalation.

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