Which of these is a property of acids?
(A) Bitter taste
(B) Turns red litmus blue
(C) Sour taste
(D) Slippery feel
Answer: (C)
Which of the following is not an element?
(A) Sulfur
(B) Phosphorus
(C) Chlorine
(D) Steel
Answer: (D)
Which acid is secreted in the stomach for digestion?
(A) Hydrochloric acid
(B) Sulfuric acid
(C) Nitric acid
(D) Acetic acid
Answer: (A)
Which of the following is used in making fertilizers?
(A) Potassium nitrate
(B) Ammonium nitrate
(C) Urea
(D) All of the above
Answer: (D)
Which process separates components based on boiling points?
(A) Filtration
(B) Distillation
(C) Sedimentation
(D) Crystallization
Answer: (B)
Which of these is not a chemical change?
(A) Boiling of water
(B) Rusting of iron
(C) Digestion of food
(D) Burning of wood
Answer: (A)
Which of these is a non-biodegradable substance?
(A) Plastic
(B) Paper
(C) Wood
(D) Food
Answer: (A)
Which is a chemical method to soften hard water?
(A) Boiling
(B) Adding sodium carbonate
(C) Filtering
(D) Cooling
Answer: (B)
Which gas is released when acid reacts with a metal?
(A) Oxygen
(B) Nitrogen
(C) Hydrogen
(D) Carbon dioxide
Answer: (C)
Which ion is responsible for basicity in bases?
(A) H⁺
(B) OH⁻
(C) Na⁺
(D) Cl⁻
Answer: (B)
Which element is liquid at room temperature and pressure?
(A) Lead
(B) Mercury
(C) Iron
(D) Tin
Answer: (B)
Which one is a synthetic polymer?
(A) Starch
(B) Cellulose
(C) Nylon
(D) Protein
Answer: (C)
The main gas in biogas is –
(A) Carbon dioxide
(B) Methane
(C) Hydrogen
(D) Oxygen
Answer: (B)
Which of these is the softest metal?
(A) Iron
(B) Lead
(C) Lithium
(D) Gold
Answer: (C)
Which of the following causes permanent hardness in water?
(A) Ca(HCO₃)₂
(B) MgCl₂
(C) CaCO₃
(D) CO₂
Answer: (B)
Which is the common name of sodium bicarbonate?
(A) Washing soda
(B) Baking soda
(C) Caustic soda
(D) Bleaching powder
Answer: (B)
Which of these is used in the preparation of aqua regia?
(A) H₂SO₄ and HNO₃
(B) HCl and H₂SO₄
(C) HCl and HNO₃
(D) HNO₃ and H₂O₂
Answer: (C)
Which type of bond is found in NaCl?
(A) Covalent
(B) Hydrogen
(C) Ionic
(D) Metallic
Answer: (C)
Which group contains halogens?
(A) Group 14
(B) Group 15
(C) Group 16
(D) Group 17
Answer: (D)
Which compound gives a silver mirror with Tollen’s reagent?
(A) Acetone
(B) Acetic acid
(C) Formaldehyde
(D) Ethanol
Answer: (C)
Which is not a noble gas?
(A) Argon
(B) Xenon
(C) Nitrogen
(D) Neon
Answer: (C)
Which is the most abundant metal in the earth’s crust?
(A) Iron
(B) Calcium
(C) Aluminum
(D) Magnesium
Answer: (C)
What is the IUPAC name of acetylene?
(A) Ethyne
(B) Ethene
(C) Ethanol
(D) Ethanal
Answer: (A)
Which of the following compounds is ionic?
(A) NaCl
(B) CH₄
(C) CCl₄
(D) CO₂
Answer: (A)
Which among the following is acidic in nature?
(A) Soap
(B) Vinegar
(C) Toothpaste
(D) Baking soda
Answer: (B)
Which of the following is an example of an element?
(A) Brass
(B) Bronze
(C) Oxygen
(D) Air
Answer: (C)
Which organic functional group is present in CH₃CHO?
(A) Alcohol
(B) Aldehyde
(C) Acid
(D) Ketone
Answer: (B)
Which of these is responsible for the depletion of ozone layer?
(A) CFCs
(B) CO₂
(C) NO
(D) SO₂
Answer: (A)
Which of these gases is colorless and odorless?
(A) Chlorine
(B) Ammonia
(C) Hydrogen
(D) Sulfur dioxide
Answer: (C)
Which of the following compounds is insoluble in water?
(A) NaCl
(B) AgCl
(C) KNO₃
(D) HCl
Answer: (B)
Which chemical compound is known as laughing gas?
(A) NO₂
(B) N₂O
(C) CO
(D) CH₄
Answer: (B)
Which organic compound has the formula C₂H₆O?
(A) Ethanol
(B) Dimethyl ether
(C) Both A and B
(D) Acetone
Answer: (C)
Which of the following is a non-renewable energy resource?
(A) Wind
(B) Solar
(C) Coal
(D) Biomass
Answer: (C)
Which compound is used as antifreeze in automobile engines?
(A) Methanol
(B) Ethanol
(C) Ethylene glycol
(D) Glycerol
Answer: (C)
Which of these gases is heavier than air?
(A) Hydrogen
(B) Helium
(C) Methane
(D) Carbon dioxide
Answer: (D)
Which of these forms an acidic oxide?
(A) Na₂O
(B) CO₂
(C) MgO
(D) CaO
Answer: (B)
Which of these is not a characteristic of bases?
(A) Turn red litmus blue
(B) Bitter taste
(C) Release H⁺ ions
(D) Slippery feel
Answer: (C)
Which compound has a fishy smell?
(A) Amine
(B) Ester
(C) Ether
(D) Carboxylic acid
Answer: (A)
Which of the following is a mixture?
(A) Water
(B) Glucose
(C) Air
(D) Carbon dioxide
Answer: (C)
Which among the following is used as rocket fuel?
(A) Diesel
(B) Kerosene
(C) Liquid hydrogen and oxygen
(D) CNG
Answer: (C)
Which of these is a fossil fuel?
(A) Wood
(B) Peat
(C) Coal
(D) All of the above
Answer: (C)
The rusting of iron is –
(A) A physical change
(B) A chemical change
(C) Both
(D) Neither
Answer: (B)
Which substance is commonly used as a preservative?
(A) Vinegar
(B) Salt
(C) Sugar
(D) All of the above
Answer: (D)
Which of the following gives effervescence with acids?
(A) Sodium chloride
(B) Calcium carbonate
(C) Potassium nitrate
(D) Sodium sulfate
Answer: (B)
Which part of soap dissolves in water?
(A) Hydrocarbon tail
(B) Ionic head
(C) Methyl group
(D) Alkyl group
Answer: (B)
Which of these is used to disinfect drinking water?
(A) Alum
(B) Bleaching powder
(C) KMnO₄
(D) All of the above
Answer: (D)
Which of these undergoes polymerization?
(A) Ethene
(B) Methane
(C) Ethanol
(D) Acetic acid
Answer: (A)
Which of the following is responsible for acid rain?
(A) CO
(B) NO₂
(C) NH₃
(D) CH₄
Answer: (B)
Which type of bond is present in H₂ molecule?
(A) Ionic
(B) Covalent
(C) Coordinate
(D) Metallic
Answer: (B)
Which of the following is a macronutrient for plants?
(A) Boron
(B) Zinc
(C) Nitrogen
(D) Molybdenum
Answer: (C)