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Chemistry Study Material बिभाग ‘ख’

Chemistry Study Material बिभाग ‘ख’ Shared By Shridab Khan

Chemistry Study Material बिभाग ‘ख’ on mahasarkar.co.in. This is the page where we are deal with Chemistry Study Material For Maharashtra Recruitment Exam. Every questions come from various source i.e. Matter and its Nature; Kinetic Theory of Matter; Chemical Reactions and the chemical Equations; Structure of the Atom; Periodic Table of Elements; Chemical Bonding; Oxidation and Reduction; Oxygen ans Air; Hydrogen and Water; Carbon and its Compounds; Nitrogen and its Compound;Acids; Bases and Salts; Occurrence of Metals; Petroleum and Natural Gas; Iron and steel; Environmental Chemistry and Pollution;Food Chemistry; Biochemistry and Life Processes; Polymers and platics; Electrochemistry; Dyes; Biotechnology; International Symbols for Units; Carbohydrates; Proteins and Nucleic Acids; Nucleoproteins and Nucleic Acids; Fats; Important Laws Governing Gases; Liquids and Solutions; Bioterrorism; Important Topics and Concepts Etc. यह पेज ओह सब स्टूडेंट के लिए है, जो नौकरी की तलाश में हैं और भारती परिक्षा दिने के लिए इच्छुक हैं।

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Chemistry Study Material बिभाग ‘ख’

  1. The natural substance from which energy can be harnessed, and is essentially made up of only one element is
  • Petroleum
  • Coal
  • Water (in dams)
  • Air (in winds mills)

Ans:- (b) Coal

  1. The substance that can conduct electricity in its molten state is
  • Polythene
  • Glucose
  • Common salt
  • Urea

Ans:- (c) Common salt

  1. Antidote for lead poisoning is
  • Nickel
  • Cis platin
  • White of egg
  • EDTA

Ans:- (d) EDTA

  1. Dolomite is an ore of
  • Mg
  • Zn
  • Fe
  • Pb

Ans:- (a) Mg

  1. The substance that is not polymeric in nature is
  • Nylon
  • Cellulose
  • Starch
  • Glucose

Ans:- (d) Glucose

  1. The process that involves a chemical change is
  • Dissolution of common salt in water
  • Refining of petroleum by fractional distillation
  • Combustion of petrol in motor cars
  • Mixing of petrol and ethyl alcohol

Ans:- (c) Combustion of petrol in motor cars

  1. Dissolved oxygen should not be less than _________ mg/1 of water.
  • 4
  • 3
  • 5
  • 2

Ans:- (a) 4

  1. The compound obtained by heating a caustic soda solution with linseed oil can be used as a
    (a) Fuel

(b) Fertilizer

(c) Soap

(d) Plastic

Ans:- (c) Soap

  1. The gases used in the manufacture of ammonia are
  • Nitrogen and oxygen
  • Oxygen and nitric oxide
  • Nitrogen and methane
  • Nitrogen and hydrogen

Ans:- (d) Nitrogen and hydrogen

  1. The purest form of water is
  • Rain Water
  • Heavy water
  • Tap water
  • Distilled water

Ans:- (a) Rain Water

  1. Chloromycetain is an
  • Antiseptic
  • Antidepressant
  • Analgesic
  • Antibacterial

Ans:- (d) Antibacterial

  1. Oxidation is a process which involves
    (a) The loss of electrons

(b) The gain of hydrogen

(c) The gain of electrons

(d) No change in electrons

Ans:- (a) The loss of electrons

  1. For respiration, deep-sea diverse use a mixture of
  • Oxygen and carbon dioxide
  • Hydrogen and oxygen
  • Oxygen and Nitrogen
  • Oxygen and helium

Ans:- (c) Oxygen and Nitrogen

  1. In the process of dialysis, used on patients with affected kidneys, the phenomenon involved is
  • Diffusion
  • Absorption
  • Osmosis
  • Electrophoresis

Ans:- (c) Osmosis

  1. Gunpowder consists of a mixture of
  • Sand and TNT
  • Sulphur, sand and charcoal
  • Nitre, Sulphur and charcoal
  • TNT and charcoal

Ans:- (c) Nitre, Sulphur and charcoal

  1. The reagent that bleaches the colour of a fabric is
  • Sodium chloride
  • Sulphur dioxide
  • Carbon dioxide
  • Sulphur trioxide

Ans:- (b) Sulphur dioxide

  1. The process in which a solid substance, on being heated, changes directly into gaseous form is known as
  • Dissociation
  • Dissolution
  • Sublimation
  • Evaporation

Ans:- (c) Sublimation

  1. Silver halides are used in photographic plates because they are
  • Oxidised in air
  • Colourless
  • Easily soluble in hypo solution
  • Readily reduced by light

Ans:- (d) Readily reduced by light

  1. It is not advisable to sleep under a tree at night because trees release
  • Carbon dioxide
  • Oxygen
  • Carbon monoxide
  • Sulphur dioxide

Ans:- (a) Carbon dioxide

  1. The pure crystalline form of silica used in scientific apparatus for passing ultraviolet light is called
  • Ethylene
  • Ethane
  • Carbon dioxide
  • Acetylene

Ans:- (d) Acetylene

  1. The purity of primary gold is
  • 32 carat
  • 24 quartz
  • 24 carat
  • 22 carat

Ans:- (c) 24 carat

  1. Serpasil is
  • Tranquilizer
  • Not a natural product
  • Produced by micro-organisms
  • A mordant dye

Ans:- (a) Tranquilizer

  1. The compound used as an anti-malarial drug is
  • Chloroquine
  • Penicillin
  • Hydroquinone
  • Aspirin

Ans:- (a) Chloroquine

  1. The first metal to be used by man was
  • Aluminium
  • Copper
  • Silver
  • Iron

Ans:- (b) Copper

  1. The most malleable metal is
  • Platinum
  • Silver
  • Iron
  • Gold

Ans:- (d) Gold

  1. Artificially, gasoline is prepared by an industrial process known as
  • Sabatier and Sendren’s process
  • Friedel-Crafts reaction
  • Fischer- Tropsch process
  • Haber’s process

Ans:- (c) Fischer- Tropsch process

  1. River water is harder than rain water because it cause
  • Is always flowing
  • Is exposed to the atmosphere
  • Contains salts of calcium and magnesium
  • Contains sodium chloride

Ans:- (c) Contains salts of calcium and magnesium

  1. The pH of human blood is around
  • 3
  • 5
  • 12
  • 6

Ans:- (b) 7.5

  1. Persons in asbestos factories are affected by air pollution. The most affected part of their body is the
  • Eye
  • Throat
  • Lungs
  • Skin
  • Ans:- (c) Lungs
  1. Dialysis is used for patients having
  • Kidney trouble
  • Liver diseases
  • Lung trouble
  • Heart diseases

Ans:- (a) Kidney trouble

  1. The Central Drug Research Institute (CDRI, India) is located in
  • Allahabad
  • Delhi
  • Lucknow
  • Bangalore

Ans:- (c) Lucknow

  1. The nature of saliva is
  • Neutral
  • Acidic
  • Basic
  • Amphoteric

Ans:- (b) Acidic

  1. The bacteria responsible for ‘nitrogen fixation’ is found in the roots of
  • Grass
  • Citrus plants
  • Leguminous plants
  • Neem tree

Ans:- (c) Leguminous plants

  1. A solution with pH=2 is more acidic than a solution of pH=6 by a factor of
  • Silver nitrate solution
  • Ninhydrin solution
  • Iodine fuming
  • Universal gray powder

Ans:- (b) Ninhydrin solution

  1. The maximum concentration of alcohol that does not impair faculties of the human body is
  • 3%
  • 9%
  • 3%
  • 10%

Ans:- (b) 0.9%

  1. Anaemia occurs due to the lack of
  • Iodine
  • Calcium
  • Potassium
  • Iron

Ans:- (d) Iron

  1. The best way of sterling a hypodermic syringe for injecting medicine is by
  • Keeping it in alcohol for some time
  • Cleaning it with an alcohol-water mixture
  • Boiling it in water
  • Boiling it in water in a pressure cooker

Ans:- (a) Keeping it in alcohol for some time

  1. Of the following substances, the one that cannot be used as an insecticide is
  • DDT
  • Malathion
  • Gammexane
  • Bleaching powder

Ans:- (d) Bleaching powder

  1. For rural electrification and domestic cooking, the most appropriate and economical would be
  • Biogas
  • Nuclear energy
  • Electricity
  • Wind mills

Ans:- (a) Biogas

  1. Of the following commonly used materials, the one that is not an alloy is
  • Steel
  • Brass
  • Bronze
  • Copper

Ans:- (d) Copper

  1. Of the following substances, the one that can be used as an explosive is
  • DDT
  • Ozone
  • TNT
  • Paracetamol

Ans:- (c) TNT

  1. The ‘IC’ chips used in computers are made of
  • Chromium
  • Iron oxide
  • Silica
  • Silicon

Ans:- (d) Silicon

  1. In hospitals, the oxygen tubes for respiration contain oxygen and
  • Nitrogen
  • Helium
  • Argon
  • Carbon dioxide

Ans:- (b) Helium

  1. Acety1 salicylic acid is commonly used as
  • Tear gas
  • A fertilizer
  • A pain killer
  • A sedative

Ans:- (c) A pain killer

  1. Aluminium in the earth’s crust, is found as
  • Cryolite
  • Bauxite
  • Gypsum
  • Native metal

Ans:- (b) Bauxite

  1. Radiocarbon dating is used to estimate the ages of
  • Babies
  • Fossils
  • Rocks
  • Ancient buildings

Ans:- (b) Fossils

  1. The gas in atmospheric air that helps in burning is
  • Nitrogen
  • Helium
  • Oxygen
  • Hydrogen

Ans:- (c) Oxygen

  1. Normally, the substances that fight against diseases in human system are known as
  • Deoxyribonucleic acids
  • Antigens
  • Enzymes
  • Antibodies

Ans:- (c) Antibodies

  1. The substance that is least prone to catch and spread fire is
  • Nylon
  • Terycot
  • Cotton
  • Polyester

Ans:- (c) Cotton

  1. The most abundant source of iron is
  • Milk
  • Green vegetables
  • Eggs
  • Beans

Ans:- (b) Green vegetables


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