Dalal Chemistry Class 10. We covered all the Dalal Chemistry Class 10 MCQs in this post for free so that you can practice well for the exam.
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Dalal Chemistry Class 10 Objective for Students
……… is made by mixing iron with carbon and metals like chromium, nickel, and manganese:
(a) Ship.
(b) Stainless Steel.
(c) Rust.
(d) Ozone.
Option b – Stainless Steel
Temporary hardness in water is due to which one of the following of Calcium and Magnesium? ( Dalal Chemistry Class 10 MCQ )
(a) Hydrogencarbonates.
(b) Carbonates.
(c) Chlorides.
(d) Sulphates.
Option a – Hydrogencarbonates
Which of the following characteristics is of an exothermic reaction?
(a) Release of heat.
(b) Absorption of heat.
(c) Doesn’t involve any change in temperature.
(d) None of the options is correct.
Option a – Release of heat
What is an endothermic reaction? ( Dalal Chemistry Class 10 MCQ )
(a) Reaction in which heat is released.
(b) Reaction in which heat is absorbed.
(c) Reaction in which neither heat is released nor absorbed.
(d) None of the above.
Option b – Reaction in which heat is absorbed
Which of the following is an ore of Aluminium?
(a) Galena.
(b) Cryolite.
(c) Cinnabar.
(d) Epsom Salt.
Option b – Cryolite
What is the nature of the pH of Milk? ( Dalal Chemistry Class 10 MCQ )
(a) Slightly Acidic.
(b) Slightly Basic.
(c) Highly Acidic.
(d) Highly Basic.
Option a – Slightly Acidic
Which among the following is not an example of an emulsion?
(a) Chocolate Milk.
(b) Butter.
(c) Whipped Cream.
(d) Curd.
Option d – Curd
In which industry is Potassium Nitrate used commercially? ( Dalal Chemistry Class 10 MCQ )
(a) Glass Manufacturing.
(b) Electroplating.
(c) Fire Cracker Manufacturing.
(d) Leather Industry.
Option c – Fire Cracker Manufacturing
Which of the following is not an example of an Allotrope?
(a) Diamond.
(b) Graphite.
(c) Ozone.
(d) Steel.
Option d – Steel
The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its ……… ( Dalal Chemistry Class 10 MCQ )
(a) Crystallisation.
(b) Melting point.
(c) Evaporation.
(d) Galvanisation.
Option b – Melting point
The raw materials used for the manufacture of cement are:
(a) Lime, silica, and sulfur dioxide
(b) Lime, silica, and carbon dioxide
(c) Lime, silica, and alumina
(d) Lime, silica, and boric acid
Option c – Lime, silica, and alumina
Which one of the following statements about water is not true? ( Dalal Chemistry Class 10 MCQ )
(a) Hydrogen bonds are present in liquid water.
(b) Water has a high boiling point.
(c) Water has a high heat of fusion.
(d) Water is a non-polar molecule.
Option d – Water is a non-polar molecule
Which one of the following is used as a binder in paints?
(a) Titanium dioxide
(b) Novolac
(c) Phthalocyanine
(d) Silicones
Option b – Novolac
Tooth enamel is made up of which one of the following calcium compounds? ( Dalal Chemistry Class 10 MCQ )
(a) Calcium carbonate
(b) Calcium sulfate
(c) Calcium hydroxide
(d) Calcium phosphate
Option d – Calcium phosphate
A powerful eye irritant in the smoke is:
(a) Ozone
(b) Sulphur dioxide
(c) Carbon dioxide
(d) Peroxyacetyl nitrate
Option d – Peroxyacetyl nitrate
Which one of the following gemstones contains beryllium metal? ( Dalal Chemistry Class 10 MCQ )
(a) Topaz
(b) Emerald
(c) Ruby
(d) Blue sapphire
Option b – Emerald
Which one of the following statements is correct?
(a) Both boiling and evaporation are surface phenomena.
(b) Boiling is a surface phenomenon, but evaporation is a bulk phenomenon.
(c) Both boiling and evaporation are bulk phenomena.
(d) Boiling is a bulk phenomenon, but evaporation is a surface phenomenon.
Option d – Boiling is a bulk phenomenon, but evaporation is a surface phenomenon
Which one of the following statements about diamond and graphite is not correct?
(a) Diamond has a tetrahedral structure, whereas graphite has a hexagonal planar structure.
(b) Both the physical and chemical properties of diamond and graphite are different.
(c) Graphite is soft but diamond is hard.
(d) Graphite is a good conductor of electricity while diamond is not.
Option d – Graphite is a good conductor of electricity while diamond is not
Which one of the following is not true for the form of carbon known as diamond?
(a) It is harder than graphite.
(b) It contains the same percentage of carbon as graphite.
(c) It is a better electric conductor than graphite.
(d) It has different carbon-to-carbon distances in all directions.
Option c – It is a better electric conductor than graphite
Two reactants in a flask at room temperature are producing bubbles of a gas that turn limewater milky. The reactants could be:
(a) Zinc and hydrochloric acid
(b) Magnesium carbonate and hydrochloric acid
(c) Methane and oxygen
(d) Copper and dilute hydrochloric acid
Option b – Magnesium carbonate and hydrochloric acid
The reaction between which of the following two reactants will produce hydrogen gas?
(a) Magnesium and hydrochloric acid
(b) Copper and dilute nitric acid
(c) Calcium carbonate and hydrochloric acid
(d) Zinc and nitric acid
Option a – Magnesium and hydrochloric acid
Which of the following characteristics is common to hydrogen, nitrogen, oxygen, and carbon dioxide?
(a) They are all diatomic
(b) They are all gases at room temperature.
(c) They are all colored
(d) They all have the same reactivity.
Option b – They are all gases at room temperature
Which one of the following is not a characteristic of a compound?
(a) Composition is variable
(b) All particles of the compound are of only one type
(c) Particles of the compound have two or more elements
(d) Its constituents cannot be separated by simple physical methods.
Option a – Composition is variable
Which one of the following elements will be an isobar of calcium if the atomic number of calcium is 20 and its mass number is 40?
(a) Element with 20 protons and 18 neutrons
(b) Element with 18 protons and 19 neutrons
(c) Element with 20 protons and 19 neutrons
(d) Element with 18 protons and 22 neutrons
Option d – Element with 18 protons and 22 neutrons
Which one of the following elements is used as a timekeeper in atomic clocks?
(a) Potassium
(b) Caesium
(c) Calcium
(d) Magnesium
Option b – Caesium
Which one of the following gases dissolves in water to give an acidic solution?
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen
(d) Hydrogen
Option a – Carbon dioxide
Why is argon gas used along with tungsten wire in an electric bulb?
(a) To increase the life of the bulb
(b) To reduce the consumption of electricity
(c) To make the emitted light colored
(d) To reduce the cost of the bulb
Option a – To increase the life of the bulb
Which one of the following is a heterogeneous mixture?
(a) Hydrochloric acid
(b) Vinegar
(c) Milk
(d) Soda water
Option c – Milk
Bright light is found to emit from a photographer’s flashgun. This brightness is due to the presence of which one of the following noble gases?
(a) Argon
(b) Xenon
(c) Neon
(d) Helium
Option b – Xenon
The stench due to leakage from an LPG cylinder is because of:
(a) Methane
(b) Propane
(c) Butane
(d) Ethyl mercaptan
Option d – Ethyl mercaptan
Which one of the following organic acids is abundant in grapes, tamarind, and banana?
(a) Acetic acid
(b) Citric acid
(c) Lactic acid
(d) Tartaric acid
Option d – Tartaric acid
Bronze is an alloy of copper and:
(a) Nickel
(b) Iron
(c) Tin
(d) Aluminium
Option c – Tin
Liquid water is denser than ice due to:
(a) Higher surface tension
(b) Hydrogen bonding
(c) Van der Waals forces
(d) Covalent bonding
Option b – Hydrogen bonding
Which one of the following is the chemical name of heavy water?
(a) Hydrogen oxide
(b) Deuterium dioxide
(c) Deuterium oxide
(d) Heavy hydrogen oxide
Option c – Deuterium oxide
The mass number of an element is NOT changed when it emits:
(a) Alpha and Beta radiations only
(b) Alpha and Gamma radiations only
(c) Beta and Gamma radiations only
(d) Alpha, Beta, and Gamma radiations
Option c – Beta and Gamma radiations only
Which pair of the following is of Copper alloys?
(a) Brass and invar
(b) Bronze and Nichrome
(c) Brass and Bronze
(d) None of these
Option c – Brass and Bronze
Which of the following is also used as a lubricant?
(a) Cuprite
(b) Graphite
(c) Haematite
(d) Cryolite
Option b – Graphite
The material used for safety from nuclear radiation is:
(a) Copper
(b) Platinum
(c) Iron
(d) Lead
Option d – Lead
Which one of the following is a natural polymer?
(a) Bakelite
(b) Silk
(c) Kevlar
(d) Lexan
Option b – Silk
Urea is:
(a) A nitrogen-containing organic compound
(b) A nitrogen-containing inorganic compound
(c) A plant hormone
(d) An Endergonic compound
Option a – A nitrogen-containing organic compound
Tincture of iodine is an antiseptic for fresh wounds. It is a dilute solution of elemental iodine, which does not contain:
(a) Water.
(b) Acetone.
(c) Alcohol.
(d) Potassium iodide.
Option b – Acetone
Carborundum is used as an abrasive because it:
(a) Has high thermal conductivity.
(b) Has a low coefficient of expansion.
(c) Has high chemical stability.
(d) Is extremely hard.
Option d – Is extremely hard
‘Plum Pudding Model’ for an atom was proposed by:
(a) Antoine Lavoisier.
(b) Robert Boyle.
(c) Ernest Rutherford.
(d) J. J. Thomson.
Option d – J. J. Thomson
The paste of a white material in water is used to maintain a fractured bone fixed in place. The white material used is called:
(a) Bleaching powder.
(b) Plaster of Paris.
(c) Powder of zinc oxide.
(d) Lime powder.
Option b – Plaster of Paris
Which one of the following types of glasses is used for making optical instruments?
(a) Pyrex glass.
(b) Soft glass.
(c) Hard glass.
(d) Flint glass.
Option c – Hard glass
An emulsion consists of:
(a) One liquid and one solid.
(b) One liquid and one gas.
(c) Two liquids.
(d) Two solids.
Option c – Two liquids
The joule-Thomson process is extremely useful and economical for attaining low temperatures. The process can be categorized as:
(a) Isobaric process.
(b) Isoenthalpic process.
(c) Adiabatic process.
(d) Isochoric process.
Option c – Adiabatic process
The foul smell of urine of a healthy man having healthy food, when spilled on the floor, is mainly due to the bacterial decomposition of:
(a) Urea into sulfur dioxide.
(b) Sugar into carbon dioxide.
(c) Lipids into methane.
(d) Urea into ammonia.
Option d – Urea into ammonia
Which one of the following polymers does not contain glucose units?
(a) Glycogen.
(b) Starch.
(c) Cellulose.
(d) Rubber.
Option d – Rubber
The proposition ‘equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure is known as:
(a) Avogadro’s hypothesis.
(b) Gay-Lussac’s hypothesis.
(c) Planck’s hypothesis.
(d) Kirchhoff’s theory.
Option a – Avogadro’s hypothesis
Which one of the following is a chemical change?
(a) Cutting of hair.
(b) Graying of hair naturally.
(c) Swelling of resin in water.
(d) Cutting of fruit.
Option b – Graying of hair naturally
Which one among the following chemicals is used as washing soda?
(a) Calcium carbonate.
(b) Calcium bicarbonate.
(c) Sodium carbonate.
(d) Sodium bicarbonate.
Option c – Sodium carbonate
Why is potassium permanganate used for purifying drinking water?
(a) It kills germs.
(b) It dissolves the impurities.
(c) It is a reducing agent.
(d) It is an oxidizing agent.
Option d – It is an oxidizing agent
The desirable range of pH for drinking water is:
(a) 6.5 to 8.5.
(b) 5.0 to 6.5.
(c) 6.5 to 7.0.
(d) 7.0 to 8.5.
Option c – 6.5 to 7.0
Which gas is known as ‘noble gas’?
(a) Hydrogen.
(b) Oxygen.
(c) Helium.
(d) Carbon dioxide.
Option c – Helium
Which among the following is called ‘Laughing Gas’ popularly?
(a) Nitric oxide.
(b) Nitrous oxide.
(c) Nitrogen penta oxide.
(d) Nitrogen.
Option b – Nitrous oxide
The compound C6H12O4 contains:
(a) 22 atoms per mole.
(b) Twice the mass percent of H as compared to the mass percent of C.
(c) Six times the mass percent of C as compared to the mass percent of H.
(d) Thrice the mass percent of H as compared to the mass percent of O.
Losing eyesight after consuming spurious liquor (bhejal) is due to its adulteration by:
(a) Methanol.
(b) Acetaldehyde.
(c) Drug.
(d) Acidic moiety.
Option a – Methanol
Fuse wires of appropriate thickness improve their efficiency to prevent damage. These wires are made up of:
(a) Pure zinc.
(b) Pure lead.
(c) Alloy of lead and tin.
(d) Alloy of lead and zinc.
Option c – Alloy of lead and tin
Which of the following is/are used as a disinfectant for water?
(a) Ozone.
(b) Chlorine dioxide.
(c) Chloramine.
(d) All of these.
Option d – All of these
Pungency in chilies is due to the presence of:
(a) Lycopene.
(b) Capsaicin.
(c) Carotene.
(d) Anthocyanin.
Option b – Capsaicin
Which among the following leaked during the Bhopal gas tragedy in 1984?
(a) Methyl isocyanide.
(b) Methyl isocyanate.
(c) Methyl isochloride.
(d) Methyl isochlorate.
Option b – Methyl isocyanate
In the manufacture of Vanaspati ghee from vegetable oils, which among the following gases is used?
(a) Nitrogen.
(b) Carbon dioxide.
(c) Hydrogen.
(d) Neon.
Option c – Hydrogen
Soap and detergents help remove dirt from clothes. They do so because of having two parts:
(a) Hydrophilic, neutrophilic.
(b) Both are hydrophobic.
(c) Hydrophilic and hydrophobic.
(d) Neutrophilic, hydrophobic.
Option c – Hydrophilic and hydrophobic
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