Which of the following has tetrahedral geometry?
(A) CO₂
(B) CH₄
(C) NH₃
(D) H₂O
Answer: (B)

Which gas is liberated during the reaction of acid with metal carbonate?
(A) Hydrogen
(B) Oxygen
(C) Carbon dioxide
(D) Nitrogen
Answer: (C)

Which of the following compounds is least reactive?
(A) Alkane
(B) Alkene
(C) Alkyne
(D) Alcohol
Answer: (A)

Which oxide is used to remove acidity in soils?
(A) SO₂
(B) CO₂
(C) CaO
(D) SiO₂
Answer: (C)

Which among the following is a biodegradable polymer?
(A) Polythene
(B) PVC
(C) PHBV
(D) Nylon
Answer: (C)

Which acid is found in grapes and tamarind?
(A) Oxalic acid
(B) Citric acid
(C) Tartaric acid
(D) Lactic acid
Answer: (C)

Which of the following is used in the manufacture of rayon?
(A) Cellulose
(B) Protein
(C) Lipid
(D) Glycogen
Answer: (A)

Which compound contains a carboxylic acid group?
(A) CH₄
(B) CH₃OH
(C) CH₃COOH
(D) CH₃CHO
Answer: (C)

What is the oxidation number of sulfur in H₂SO₄?
(A) +4
(B) +6
(C) –2
(D) 0
Answer: (B)

Which of the following is used as a refrigerant?
(A) Ammonia
(B) Propane
(C) Freon
(D) All of the above
Answer: (D)

Which functional group is present in ketones?
(A) –OH
(B) –CHO
(C) –CO–
(D) –COOH
Answer: (C)

Which substance is used to remove permanent hardness of water?
(A) NaCl
(B) Na₂CO₃
(C) NaHCO₃
(D) NaOH
Answer: (B)

The chemical formula of quick lime is –
(A) Ca(OH)₂
(B) CaCO₃
(C) CaO
(D) CaSO₄
Answer: (C)

Which gas gives dense white fumes with HCl gas?
(A) NH₃
(B) SO₂
(C) NO₂
(D) CO₂
Answer: (A)

Which of the following compounds is responsible for acid rain?
(A) CO
(B) CH₄
(C) SO₂
(D) O₃
Answer: (C)

The main constituent of vinegar is –
(A) Citric acid
(B) Acetic acid
(C) Formic acid
(D) Oxalic acid
Answer: (B)

Which salt is commonly used for de-icing roads in winter?
(A) NaCl
(B) KCl
(C) CaCl₂
(D) NaHCO₃
Answer: (A)

Which of the following is not a metal?
(A) Sodium
(B) Potassium
(C) Bromine
(D) Calcium
Answer: (C)

Which vitamin is essential for blood clotting?
(A) Vitamin A
(B) Vitamin C
(C) Vitamin K
(D) Vitamin D
Answer: (C)

The valency of carbon is –
(A) 2
(B) 3
(C) 4
(D) 1
Answer: (C)

What is the chemical name of bleaching powder?
(A) Calcium hypochlorite
(B) Calcium oxide
(C) Calcium chloride
(D) Sodium hypochlorite
Answer: (A)

Which metal is used to make aircraft bodies?
(A) Iron
(B) Copper
(C) Aluminum
(D) Zinc
Answer: (C)

Which of the following is not an alloy?
(A) Brass
(B) Steel
(C) Bronze
(D) Quartz
Answer: (D)

Which of the following is an oxidizing agent?
(A) H₂
(B) Cl₂
(C) NH₃
(D) CH₄
Answer: (B)

Which of these is an example of a chemical property?
(A) Melting point
(B) Density
(C) Reactivity with acid
(D) Boiling point
Answer: (C)

Which of the following is a polyatomic ion?
(A) OH⁻
(B) Na⁺
(C) Cl⁻
(D) K⁺
Answer: (A)

Which chemical is used in rain photography?
(A) AgBr
(B) AgNO₃
(C) AgCl
(D) Ag₂S
Answer: (C)

The number of bonds in N₂ molecule is –
(A) 1
(B) 2
(C) 3
(D) 4
Answer: (C)

Which among the following elements shows variable valency?
(A) Sodium
(B) Chlorine
(C) Iron
(D) Calcium
Answer: (C)

Which of the following has the highest melting point?
(A) Iron
(B) Platinum
(C) Tungsten
(D) Gold
Answer: (C)

Which of the following is a noble gas?
(A) Hydrogen
(B) Oxygen
(C) Fluorine
(D) Xenon
Answer: (D)

The unit of pressure in SI system is –
(A) atm
(B) mmHg
(C) Pascal
(D) Torr
Answer: (C)

Which of the following is used to make biodegradable plastic?
(A) Polythene
(B) Polyhydroxyalkanoate
(C) PVC
(D) Nylon
Answer: (B)

The pH of orange juice is –
(A) Around 2
(B) Around 5
(C) Around 7
(D) Around 9
Answer: (B)

Which metal is used in thermometers and barometers?
(A) Lead
(B) Mercury
(C) Zinc
(D) Tin
Answer: (B)

Which of the following is not an organic compound?
(A) Methane
(B) Ethanol
(C) Benzene
(D) NaCl
Answer: (D)

Which property of noble gases makes them inert?
(A) High electronegativity
(B) Full valence shell
(C) Low boiling point
(D) High ionization energy
Answer: (B)

Which substance is used as antifreeze in car engines?
(A) Glycerol
(B) Water
(C) Ethylene glycol
(D) Propanol
Answer: (C)

Which of the following contains double bonds?
(A) Methane
(B) Ethane
(C) Ethene
(D) Ethyne
Answer: (C)

Which is the chemical formula of slaked lime?
(A) CaCO₃
(B) CaO
(C) Ca(OH)₂
(D) CaCl₂
Answer: (C)

Which of these has a pungent smell?
(A) CO₂
(B) H₂
(C) NH₃
(D) O₂
Answer: (C)

Which of these elements has highest ionization energy?
(A) Fluorine
(B) Neon
(C) Helium
(D) Lithium
Answer: (C)

Which group of elements has high reactivity and forms salts?
(A) Alkaline earth metals
(B) Transition metals
(C) Halogens
(D) Noble gases
Answer: (C)

Which of the following is used to prepare soft drinks?
(A) CO₂
(B) O₂
(C) N₂
(D) NH₃
Answer: (A)

What is the oxidation state of oxygen in peroxides?
(A) –2
(B) –1
(C) 0
(D) +1
Answer: (B)

Which of the following is a reducing sugar?
(A) Sucrose
(B) Glucose
(C) Cellulose
(D) Starch
Answer: (B)

Which of the following gases is non-polar?
(A) HCl
(B) H₂O
(C) CO₂
(D) NH₃
Answer: (C)

The common name of sodium hydroxide is –
(A) Baking soda
(B) Caustic soda
(C) Washing soda
(D) Soda ash
Answer: (B)

Which of the following compounds is an ester?
(A) CH₃COOH
(B) CH₃OH
(C) CH₃COOCH₃
(D) CH₄
Answer: (C)

The purest form of water is –
(A) Rain water
(B) Tap water
(C) Distilled water
(D) Mineral water
Answer: (C)