Dry ice is

(A) Methane hydrate
(B) Liquid Nitrogen
(C) Solid Carbondioxide
(D) Frozen Water

Answer: (C) Solid Carbondioxide

Q. What is the chemical formula of dry ice?
(A) CO
(B) CO₂
(C) C₂O₂
(D) CO₃

Answer: (B) CO₂

Q. Which acid is present in the milk?
(A) Lactic acid
(B) Oxalic acid
(C) Malic acid
(D) Citric acid

Answer: (A) Lactic acid